一箩筐 UVC 摄像头

之前我用 STM32 驱动过 OV7725 CMOS 图像传感器,再加上上个学期室友做的创新实践项目用到了 USB 摄像头,这些玩意就逐渐引起了我的兴趣。考虑到这些玩意价格也不贵,于是就买了几个研究了一下。

以下依次介绍某山寨 USB 摄像头、ThinkPad X200 摄像头模块、蓝色妖姬 M2200 、天敏 S603HD 和天敏 D805HD 。

请点击图像来查看全尺寸大图。


山寨 VGA 摄像头

P1110556

这是室友为创新实践项目在广埠屯花 15 块买的山寨 USB 摄像头,640×480 分辨率。

P1110558

公模 + 杂牌。

P1110557

主要的部件都集中在这个小壳子里。

P1110559

背面的照明 LED 开关和四颗螺丝。

P1110560

卸下螺丝,开壳。

P1110561

内部是一小块 PCB ,用一颗螺丝固定。一般而言摄像头都会刻意使用黑色的阻焊剂,而这个山寨摄像头则是使用的和普通 PCB 一样的绿色阻焊剂。这样做的后果待会儿揭晓。

P1110562

电路板背面。除了两个固定镜头座的螺丝以外,还有一枚主控芯片,没有存储设置用的 EEPROM 。这只山寨摄像头用了硬封的芯片,算是山寨货中质量比较好的了。USB 线缆和 LED 开关的连接还打了胶以便固定。

P1110613

主控是台湾珏创的 eSP268 ,8051 核心,最大只支持到 1280×1024 ,自身不带 JPEG 压缩但是可以传送传感器压制好的 MJPEG 流,属于非常鸡肋的东西了。但是现在很多摄像头都用它,因为很多的摄像头都很鸡肋。

这款芯片的集成度很高,在外部没有看到 LDO 或者 EEPROM 。

P1110610

回到正面,拧出镜头。一般光学尺寸为 1/3 英寸或者更小的传感器都使用这种 M12×0.5 螺纹的镜头接口(简称 M12 口),由两颗螺丝固定,塑料镜头座的螺丝孔间距一半是 20mm ,金属的一般是 22mm 。监控摄像机、USB 摄像头有不少都是 M12 口的,这也给镜头互换提供了便利。

P1110608

15 块钱的东西,可想而知镜头就非常简陋了。这是一只单片塑料非球面镜头,带有红外截止滤光片。

P1110609

非球面镜表面特写。

P1110563

卸下镜头座以后就可以看到这只非常小的 CMOS 彩色图像传感器了。作为山寨摄像头,采用 HC-49 封装的晶体并且焊得四平八稳也是不容易的。

P1110811

传感器的型号不明,估计光学尺寸 1/6 英寸。

P1110807

为了达到创新实践项目的要求,首先需要一个好欺负的镜头——这个镜头的红外截止滤光片暴露在最外面,比较好下手。接下来就是去掉它,换上 760nm 的近红外窄带滤光片,然后在红外光源下用摄像头拍摄手掌血管。

(你以为我那不靠谱室友真的会自己动手做项目么?)

P1110810

拿美工刀撬掉了红外截止滤光片。

P1110808

装上红外 LED 和处理好的镜头。

P1110809

为了尽量补偿绿色阻焊剂造成的影响,需要在背面贴上一层黑纸。

DSC_0479

通电开灯测试。手机摄像头的红外截止滤光片比较差一点,可以照到一些红外光,实际上这些 LED 是非常亮的。相机红外截止滤光片的质量则是非常的好,一点红外光都照不到。

P1110814

最后是 760nm 的窄带滤光片,使用的时候罩在镜头上。

接下来是 lsusb 和 ffmpeg 调用 Video4Linux 时的输出。

$ lsusb -vv
Bus 002 Device 019: ID 1e4e:0102
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x1e4e 
  idProduct          0x0102 
  bcdDevice            0.02
  iManufacturer           1 Etron Technology, Inc.
  iProduct                2 USB2.0 Camera
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          539
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass         14 Video
      bFunctionSubClass       3 Video Interface Collection
      bFunctionProtocol       0 
      iFunction               2 USB2.0 Camera
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      1 Video Control
      bInterfaceProtocol      0 
      iInterface              2 USB2.0 Camera
      VideoControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdUVC               1.00
        wTotalLength           77
        dwClockFrequency       30.000000MHz
        bInCollection           1
        baInterfaceNr( 0)       1
      VideoControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Camera Sensor
        bAssocTerminal          0
        iTerminal               0 
        wObjectiveFocalLengthMin      0
        wObjectiveFocalLengthMax      0
        wOcularFocalLength            0
        bControlSize                  3
        bmControls           0x0000000e
          Auto-Exposure Mode
          Auto-Exposure Priority
          Exposure Time (Absolute)
      VideoControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             2
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               4
        iTerminal               0 
      VideoControl Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      5 (PROCESSING_UNIT)
      Warning: Descriptor too short
        bUnitID                 3
        bSourceID               1
        wMaxMultiplier          0
        bControlSize            2
        bmControls     0x0000147f
          Brightness
          Contrast
          Hue
          Saturation
          Sharpness
          Gamma
          White Balance Temperature
          Power Line Frequency
          White Balance Temperature, Auto
        iProcessing             0 
        bmVideoStandards     0x1a
          NTSC - 525/60
          SECAM - 625/50
          NTSC - 625/50
      VideoControl Interface Descriptor:
        bLength                26
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 4
        guidExtensionCode         {adccb1c2-f6ab-b848-8e37-32d4f3a3feec}
        bNumControl             8
        bNrPins                 1
        baSourceID( 0)          3
        bControlSize            1
        bmControls( 0)       0x3f
        iExtension              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               4
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      VideoStreaming Interface Descriptor:
        bLength                            14
        bDescriptorType                    36
        bDescriptorSubtype                  1 (INPUT_HEADER)
        bNumFormats                         1
        wTotalLength                      223
        bEndPointAddress                  129
        bmInfo                              0
        bTerminalLink                       2
        bStillCaptureMethod                 2
        bTriggerSupport                     1
        bTriggerUsage                       1
        bControlSize                        1
        bmaControls( 0)                    27
      VideoStreaming Interface Descriptor:
        bLength                            27
        bDescriptorType                    36
        bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)
        bFormatIndex                        1
        bNumFrameDescriptors                5
        guidFormat                            {59555932-0000-1000-8000-00aa00389b71}
        bBitsPerPixel                      16
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x00
          Interlaced stream or variable: No
          Fields per frame: 2 fields
          Field 1 first: No
          Field pattern: Field 1 only
          bCopyProtect                      0
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         1
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                147456000
        dwMaxBitRate                147456000
        dwMaxVideoFrameBufferSize      614400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         2
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            352
        wHeight                           288
        dwMinBitRate                 48660480
        dwMaxBitRate                 48660480
        dwMaxVideoFrameBufferSize      202752
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         3
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            320
        wHeight                           240
        dwMinBitRate                 36864000
        dwMaxBitRate                 36864000
        dwMaxVideoFrameBufferSize      153600
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         4
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            176
        wHeight                           144
        dwMinBitRate                 12165120
        dwMaxBitRate                 12165120
        dwMaxVideoFrameBufferSize       50688
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         5
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            160
        wHeight                           120
        dwMinBitRate                  9216000
        dwMaxBitRate                  9216000
        dwMaxVideoFrameBufferSize       38400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            26
        bDescriptorType                    36
        bDescriptorSubtype                  3 (STILL_IMAGE_FRAME)
        bEndpointAddress                    0
        bNumImageSizePatterns               5
        wWidth( 0)                        640
        wHeight( 0)                       480
        wWidth( 1)                        352
        wHeight( 1)                       288
        wWidth( 2)                        320
        wHeight( 2)                       240
        wWidth( 3)                        176
        wHeight( 3)                       144
        wWidth( 4)                        160
        wHeight( 4)                       120
        bNumCompressionPatterns             5
      VideoStreaming Interface Descriptor:
        bLength                             6
        bDescriptorType                    36
        bDescriptorSubtype                 13 (COLORFORMAT)
        bColorPrimaries                     1 (BT.709,sRGB)
        bTransferCharacteristics            1 (BT.709)
        bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x00a0  1x 160 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x00d0  1x 208 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0300  1x 768 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       4
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x030c  1x 780 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       5
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x032c  1x 812 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       6
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x03d0  1x 976 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       7
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x03fc  1x 1020 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       8
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       9
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0a58  2x 600 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting      10
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0b00  2x 768 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting      11
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1334  3x 820 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting      12
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x13fc  3x 1020 bytes
        bInterval               1
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)
$ avconv -f video4linux2 -list_formats all -i /dev/video1
avconv version 0.8.4-4:0.8.4-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Nov  6 2012 16:51:33 with gcc 4.6.3
[video4linux2 @ 0x157cba0] R :   yuyv422 :     YUV 4:2:2 (YUYV) : 640x480 352x288 320x240 176x144 160x120
/dev/video1: Immediate exit requested

然后是样张。

2012-12-09-193646

先前说过绿色的阻焊剂会有问题。把电路板从遮光良好的外壳内拿出来后,当电路板后方的光强较强时,传感器会对电路板感光,形成上图这样的像。它会和正常的像叠加在一起。如果使用黑色的阻焊剂,光线大部分会被阻焊剂吸收,因此不会有这样的问题。

普通的前照式传感器背面比正面灵敏得多,而且没有滤光片阵列的衰减,因而当遮光措施不当时仅需少许漏光就容易影响成像。

2012-12-11-002930

微距样张。噪声较为明显,毕竟传感器面积小。

2012-12-11-003121

昏暗环境下的样张。

Image-27

改造后拍摄的手掌血管的照片。我的手掌比较肥,所以效果不是很好。另外这种图像也不是很好对焦,毕竟收集到的光经过了组织的散射,本来就是模糊的。

图像之所以是黑白的,并不是因为我做了处理,而是因为 CMOS 彩色图像传感器用的滤光片阵列上的三种滤光片均被设计成对近红外区域高透。这样同一个传感器既可以用于正常光照下的彩色图像捕获,也可用于低光照条件下的高亮度近红外图像获取。


ThinkPad X200 摄像头模块

P1110568

这玩意是我花了 25 块钱在淘宝上买的,有效像素两百万,由 Chicony 制造,原本是给 ThinkPad 使用的。由于便宜而且分辨率高,所以我就买了一块。铁架和贴纸都是赠品,可惜用不到。

P1110570

摄像头模块正面。和很多机内摄像头模块类似,此模块采用 3.3V 供电的 USB 接口,也就是说需要一个额外的 LDO 。模块提供了摄像指示灯。

P1110571

崭新的贴着贴纸的 FPC 插座,可惜马上就要进垃圾桶了。

P1110572

理光的 R5U877 图像处理器,这是一个性能相当强劲的货,VGA (640×480) 的传感器可以跑到 120fps ,SXGA (1024×768) / UXGA (1600×1200) / FullHD (1920×1080) 则可以跑到 30fps ,QXGA (2048×1536) 也可以跑到 15fps 。支持最大 300 万像素的 SMIA  CMOS 传感器,支持 300 万象素图像的实时 MJPEG 压缩,固件代码从 I2C EEPROM 或者 SPI NOR Flash 中读取。当然,这玩意的发热量也有点大。

P1110573

储存图像处理器固件的 Pm25LV512 闪存,容量 512Kbits (64KBytes) 。PMC 产的小容量 SPI 闪存似乎用得很多,我笔电上的 KBC 也是用它家的 Pm25LV010A 储存固件。

P1110574

图像处理器使用的 12MHz 贴片有源晶体振荡器。

P1110575

型号不明 SOT23-6 封装的小芯片 ,应该是为传感器提供模拟电源的 LDO 。

P1110576

模块背面,基本是空的。

P1110577

FPC 插座背面标明了针脚定义,这太方便了。

P1110578

下面准备拆除 FPC 插座。首先掰开两边焊死的金属固定卡子,然后将主体卸下,最后清理掉两个卡子。

P1110579

FPC 插座已经成功拆除。下面焊上 3.3V 输出的 1117 LDO 和 USB 线缆。

P1110581

全部焊好后的样子。位子比较狭小,没办法处理得比较好看了。

P1110583

上机测试,一切 OK 。

P1110584

拿热缩膜封好,完事。

lsusb 和 ffmpeg 输出:

$ lsusb -vv
Bus 002 Device 008: ID 17ef:4816 Lenovo 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x17ef Lenovo
  idProduct          0x4816 
  bcdDevice           23.45
  iManufacturer           1 Chicony Electronics Co., Ltd.
  iProduct                2 Integrated Camera
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          722
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              200mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass         14 Video
      bFunctionSubClass       3 Video Interface Collection
      bFunctionProtocol       0 
      iFunction               4 Integrated Camera
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      1 Video Control
      bInterfaceProtocol      0 
      iInterface              4 Integrated Camera
      VideoControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdUVC               1.00
        wTotalLength           78
        dwClockFrequency       30.000000MHz
        bInCollection           1
        baInterfaceNr( 0)       1
      VideoControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Camera Sensor
        bAssocTerminal          4
        iTerminal               0 
        wObjectiveFocalLengthMin      0
        wObjectiveFocalLengthMax      0
        wOcularFocalLength            0
        bControlSize                  3
        bmControls           0x00040a04
          Auto-Exposure Priority
          Zoom (Absolute)
          PanTilt (Absolute)
          Privacy
      VideoControl Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      5 (PROCESSING_UNIT)
      Warning: Descriptor too short
        bUnitID                 2
        bSourceID               1
        wMaxMultiplier          0
        bControlSize            2
        bmControls     0x0000013f
          Brightness
          Contrast
          Hue
          Saturation
          Sharpness
          Gamma
          Backlight Compensation
        iProcessing             0 
        bmVideoStandards     0x1b
          None
          NTSC - 525/60
          SECAM - 625/50
          NTSC - 625/50
      VideoControl Interface Descriptor:
        bLength                27
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 3
        guidExtensionCode         {0a3e1874-8254-1a48-b402-48b8b8c49cc8}
        bNumControl            10
        bNrPins                 1
        baSourceID( 0)          2
        bControlSize            2
        bmControls( 0)       0xff
        bmControls( 1)       0x03
        iExtension              0 
      VideoControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             4
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               3
        iTerminal               0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               8
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      VideoStreaming Interface Descriptor:
        bLength                            15
        bDescriptorType                    36
        bDescriptorSubtype                  1 (INPUT_HEADER)
        bNumFormats                         2
        wTotalLength                      533
        bEndPointAddress                  130
        bmInfo                              1
        bTerminalLink                       4
        bStillCaptureMethod                 1
        bTriggerSupport                     0
        bTriggerUsage                       0
        bControlSize                        1
        bmaControls( 0)                    27
        bmaControls( 1)                    27
      VideoStreaming Interface Descriptor:
        bLength                            27
        bDescriptorType                    36
        bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)
        bFormatIndex                        1
        bNumFrameDescriptors                8
        guidFormat                            {59555932-0000-1000-8000-00aa00389b71}
        bBitsPerPixel                      16
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x02
          Interlaced stream or variable: No
          Fields per frame: 1 fields
          Field 1 first: No
          Field pattern: Field 1 only
          bCopyProtect                      0
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         1
        bmCapabilities                   0x01
          Still image supported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                147456000
        dwMaxBitRate                147456000
        dwMaxVideoFrameBufferSize      614400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         2
        bmCapabilities                   0x01
          Still image supported
        wWidth                            352
        wHeight                           288
        dwMinBitRate                 48660480
        dwMaxBitRate                 48660480
        dwMaxVideoFrameBufferSize      202752
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         3
        bmCapabilities                   0x01
          Still image supported
        wWidth                            320
        wHeight                           240
        dwMinBitRate                 36864000
        dwMaxBitRate                 36864000
        dwMaxVideoFrameBufferSize      153600
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         4
        bmCapabilities                   0x01
          Still image supported
        wWidth                            800
        wHeight                           600
        dwMinBitRate                115200000
        dwMaxBitRate                115200000
        dwMaxVideoFrameBufferSize      960000
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  1
        dwFrameInterval( 0)            666666
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         5
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1024
        wHeight                           768
        dwMinBitRate                150994944
        dwMaxBitRate                150994944
        dwMaxVideoFrameBufferSize     1572864
        dwDefaultFrameInterval         833333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            833333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         6
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1280
        wHeight                           720
        dwMinBitRate                110592000
        dwMaxBitRate                110592000
        dwMaxVideoFrameBufferSize     1843200
        dwDefaultFrameInterval        1333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)           1333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         7
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1280
        wHeight                           800
        dwMinBitRate                122880000
        dwMaxBitRate                122880000
        dwMaxVideoFrameBufferSize     2048000
        dwDefaultFrameInterval        1333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)           1333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         8
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1600
        wHeight                          1200
        dwMinBitRate                153600000
        dwMaxBitRate                153600000
        dwMaxVideoFrameBufferSize     3840000
        dwDefaultFrameInterval        2000000
        bFrameIntervalType                  1
        dwFrameInterval( 0)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            11
        bDescriptorType                    36
        bDescriptorSubtype                  6 (FORMAT_MJPEG)
        bFormatIndex                        2
        bNumFrameDescriptors                8
        bFlags                              0
          Fixed-size samples: No
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x02
          Interlaced stream or variable: No
          Fields per frame: 2 fields
          Field 1 first: No
          Field pattern: Field 1 only
          bCopyProtect                      0
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         1
        bmCapabilities                   0x01
          Still image supported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                221184000
        dwMaxBitRate                221184000
        dwMaxVideoFrameBufferSize      921600
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         2
        bmCapabilities                   0x01
          Still image supported
        wWidth                            352
        wHeight                           288
        dwMinBitRate                 72990720
        dwMaxBitRate                 72990720
        dwMaxVideoFrameBufferSize      304128
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         3
        bmCapabilities                   0x01
          Still image supported
        wWidth                            320
        wHeight                           240
        dwMinBitRate                 55296000
        dwMaxBitRate                 55296000
        dwMaxVideoFrameBufferSize      230400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         4
        bmCapabilities                   0x01
          Still image supported
        wWidth                            800
        wHeight                           600
        dwMinBitRate                345600000
        dwMaxBitRate                345600000
        dwMaxVideoFrameBufferSize     1440000
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)            333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         5
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1024
        wHeight                           768
        dwMinBitRate                283115520
        dwMaxBitRate                283115520
        dwMaxVideoFrameBufferSize     2359296
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  1
        dwFrameInterval( 0)            666666
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         6
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1280
        wHeight                           720
        dwMinBitRate                331776000
        dwMaxBitRate                331776000
        dwMaxVideoFrameBufferSize     2764800
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  1
        dwFrameInterval( 0)            666666
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         7
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1280
        wHeight                           800
        dwMinBitRate                368640000
        dwMaxBitRate                368640000
        dwMaxVideoFrameBufferSize     3072000
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  1
        dwFrameInterval( 0)            666666
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         8
        bmCapabilities                   0x01
          Still image supported
        wWidth                           1600
        wHeight                          1200
        dwMinBitRate                691200000
        dwMaxBitRate                691200000
        dwMaxVideoFrameBufferSize     5760000
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  1
        dwFrameInterval( 0)            666666
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0bc8  2x 968 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x13ec  3x 1004 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x13fc  3x 1020 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       4
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1400  3x 1024 bytes
        bInterval               1
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)
$ avconv -f video4linux2 -list_formats all -i /dev/video1
avconv version 0.8.4-4:0.8.4-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Nov  6 2012 16:51:33 with gcc 4.6.3
[video4linux2 @ 0x1169ba0] R :   yuyv422 :     YUV 4:2:2 (YUYV) : 640x480 352x288 320x240 800x600 1024x768 1280x720 1280x800 1600x1200
[video4linux2 @ 0x1169ba0] C :     mjpeg :                MJPEG : 640x480 352x288 320x240 800x600 1024x768 1280x720 1280x800 1600x1200
/dev/video1: Immediate exit requested

样张:

Image-10-web

对于这种需要控制厚度的模块来说镜头的成像质量往往是硬伤,不仅有极大的相差(图中的色差很明显),而且镜头往往还是定焦的,对焦很不清晰。

0009

由于传感器的光学尺寸较小,暗处噪声大是不可避免的了。

0636

套上放大镜后的微距样张。ISP 的锐化开得有点高。

最后还有 UXGA @ 15fps 的视频片段。大概是因为传感器的限制,UXGA 只能跑到 15fps ,任何更低的分辨率只能跑到 30fps 。 clip1-web


蓝色妖姬 M2200

P1110620

这款摄像头可以说是国内走高端路线的小牌厂商的代表。总的来说,其外壳和 PCB 做工不算精致,但是传感器和镜头不错。

P1110622

侧面外观,带了一个快门键。

P1110624

这玩意的外壳估计占了不少价钱,结构比较复杂,一步步拆开用了比较长的时间。

P1110625

继续拆,终于快到主体部分了。

P1110626

再拆……

P1110627

摄像头的旋转带有分段的阻尼感,从这个结构中来。

P1120036

另一侧的快门键。

P1110628

主体由两颗螺丝固定。

P1110629

电路板。和大多数厂商一样,采用了黑色的 PCB 阻焊层来防止漏光。

P1110636

USB 电缆上用了热缩管和线箍,而且打了胶,算是比较负责了。

P1110639

USB 线材还算不错,带了屏蔽。不知道是不是 Isochronous Endpoint 对线材的要求比 Bulk 高。

P1110631

一只 marking 为 1650 的 3.3V LDO 。USB 电缆的焊工比较寒酸,意料之中的。

P1110632

炮筒晶振,低端摄像头的标配了。毕竟 HC-49 太占空间,贴片的又用不起。

P1110633

中星微的 VC0342 主控,可以说跟 eSP268 在同一级别。貌似 VIMICRO 收购了 Z-Star Microelectronics ,摄像头主控这个产品线是收购得来的。

P1110634

储存设定信息的 24C64 I2C EEPROM ,里面应该主要是 CMOS 各个寄存器的设定值,以及 USB VID/PID/String Descriptor 。

P1110635

PCB 正面,一个 M12 镜头和两个 LED 占了大部分的面积,另外还有个粗糙的 MIC 。

P1110638

镜头和镜头座。

P1110641

镜头是国内镜头厂商 STAR LENS 制造的,最外面看到的是红外截止滤光片。

P1110647

可以看出是非球面的(照出来比较困难)。

P1110643

侧面的快门键。

P1110648

拆下来的 MIC 。

P1110637

1/4 英寸的 CMOS 传感器。淘宝的页面上宣称是 OV7740 。

sensorcompare

和某经销商的图片比对了下,发现应该不假。OmniVision 其它的 VGA 传感器都不是这种外观。

lsusb 和 ffmpeg 输出:

$ lsusb -vv
Bus 002 Device 011: ID 0ac8:3420 Z-Star Microelectronics Corp. Venus USB2.0 Camera
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x0ac8 Z-Star Microelectronics Corp.
  idProduct          0x3420 Venus USB2.0 Camera
  bcdDevice            1.00
  iManufacturer           1 Vimicro Corp.
  iProduct                2 Venus USB2.0 Camera
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          607
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              320mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass         14 Video
      bFunctionSubClass       3 Video Interface Collection
      bFunctionProtocol       0 
      iFunction               2 Venus USB2.0 Camera
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      1 Video Control
      bInterfaceProtocol      0 
      iInterface              2 Venus USB2.0 Camera
      VideoControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdUVC               1.00
        wTotalLength           79
        dwClockFrequency       30.000000MHz
        bInCollection           1
        baInterfaceNr( 0)       1
      VideoControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Camera Sensor
        bAssocTerminal          0
        iTerminal               0 
        wObjectiveFocalLengthMin      0
        wObjectiveFocalLengthMax      0
        wOcularFocalLength            0
        bControlSize                  3
        bmControls           0x00000000
      VideoControl Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      5 (PROCESSING_UNIT)
      Warning: Descriptor too short
        bUnitID                 2
        bSourceID               1
        wMaxMultiplier          0
        bControlSize            2
        bmControls     0x0000147b
          Brightness
          Contrast
          Saturation
          Sharpness
          Gamma
          White Balance Temperature
          Power Line Frequency
          White Balance Temperature, Auto
        iProcessing             0 
        bmVideoStandards     0x 9
          None
          SECAM - 625/50
      VideoControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               2
        iTerminal               0 
      VideoControl Interface Descriptor:
        bLength                28
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 4
        guidExtensionCode         {e3deaebb-c2ec-4d42-802c-72f2eb3dfb57}
        bNumControl             8
        bNrPins                 1
        baSourceID( 0)          1
        bControlSize            3
        bmControls( 0)       0x59
        bmControls( 1)       0x80
        bmControls( 2)       0x80
        iExtension              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x000a  1x 10 bytes
        bInterval               5
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      VideoStreaming Interface Descriptor:
        bLength                            14
        bDescriptorType                    36
        bDescriptorSubtype                  1 (INPUT_HEADER)
        bNumFormats                         1
        wTotalLength                      243
        bEndPointAddress                  130
        bmInfo                              0
        bTerminalLink                       3
        bStillCaptureMethod                 2
        bTriggerSupport                     1
        bTriggerUsage                       1
        bControlSize                        1
        bmaControls( 0)                    27
      VideoStreaming Interface Descriptor:
        bLength                            27
        bDescriptorType                    36
        bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)
        bFormatIndex                        1
        bNumFrameDescriptors                5
        guidFormat                            {59555932-0000-1000-8000-00aa00389b71}
        bBitsPerPixel                      16
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x00
          Interlaced stream or variable: No
          Fields per frame: 2 fields
          Field 1 first: No
          Field pattern: Field 1 only
          bCopyProtect                      0
      VideoStreaming Interface Descriptor:
        bLength                            34
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         1
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                   768000
        dwMaxBitRate                196608000
        dwMaxVideoFrameBufferSize      614400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  2
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            666667
      VideoStreaming Interface Descriptor:
        bLength                            34
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         2
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            352
        wHeight                           288
        dwMinBitRate                   768000
        dwMaxBitRate                196608000
        dwMaxVideoFrameBufferSize      202752
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  2
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            666667
      VideoStreaming Interface Descriptor:
        bLength                            34
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         3
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            320
        wHeight                           240
        dwMinBitRate                   768000
        dwMaxBitRate                196608000
        dwMaxVideoFrameBufferSize      153600
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  2
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            666667
      VideoStreaming Interface Descriptor:
        bLength                            34
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         4
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            176
        wHeight                           144
        dwMinBitRate                   768000
        dwMaxBitRate                196608000
        dwMaxVideoFrameBufferSize       50688
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  2
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            666667
      VideoStreaming Interface Descriptor:
        bLength                            34
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         5
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            160
        wHeight                           120
        dwMinBitRate                   768000
        dwMaxBitRate                196608000
        dwMaxVideoFrameBufferSize       38400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  2
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            666667
      VideoStreaming Interface Descriptor:
        bLength                            26
        bDescriptorType                    36
        bDescriptorSubtype                  3 (STILL_IMAGE_FRAME)
        bEndpointAddress                    0
        bNumImageSizePatterns               5
        wWidth( 0)                        640
        wHeight( 0)                       480
        wWidth( 1)                        352
        wHeight( 1)                       288
        wWidth( 2)                        320
        wHeight( 2)                       240
        wWidth( 3)                        176
        wHeight( 3)                       144
        wWidth( 4)                        160
        wHeight( 4)                       120
        bNumCompressionPatterns             5
      VideoStreaming Interface Descriptor:
        bLength                             6
        bDescriptorType                    36
        bDescriptorSubtype                 13 (COLORFORMAT)
        bColorPrimaries                     1 (BT.709,sRGB)
        bTransferCharacteristics            1 (BT.709)
        bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0080  1x 128 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       4
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0b00  2x 768 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       5
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0c00  2x 1024 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       6
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1380  3x 896 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       7
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1400  3x 1024 bytes
        bInterval               1
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         2
      bInterfaceCount         2
      bFunctionClass          1 Audio
      bFunctionSubClass       2 Streaming
      bFunctionProtocol       0 
      iFunction               3 Venus USB2.0 Camera (Audio)
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      1 Control Device
      bInterfaceProtocol      0 
      iInterface              3 Venus USB2.0 Camera (Audio)
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength           39
        bInCollection           1
        baInterfaceNr( 0)       3
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Microphone
        bAssocTerminal          0
        bNrChannels             1
        wChannelConfig     0x0000
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 2
        bSourceID               1
        bControlSize            1
        bmaControls( 0)      0x00
        bmaControls( 1)      0x03
          Mute Control
          Volume Control
        iFeature                0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          1
        bSourceID               2
        iTerminal               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           3
        bDelay                  1 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                29
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             1
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            7 Discrete
        tSamFreq[ 0]         8000
        tSamFreq[ 1]        11025
        tSamFreq[ 2]        16000
        tSamFreq[ 3]        22050
        tSamFreq[ 4]        32000
        tSamFreq[ 5]        44100
        tSamFreq[ 6]        48000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0062  1x 98 bytes
        bInterval               4
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         0 Undefined
          wLockDelay              0 Undefined
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)
$ avconv -f video4linux2 -list_formats all -i /dev/video1
avconv version 0.8.4-4:0.8.4-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Nov  6 2012 16:51:33 with gcc 4.6.3
[video4linux2 @ 0x1d49ba0] R :   yuyv422 :     YUV 4:2:2 (YUYV) : 640x480 352x288 320x240 176x144 160x120
/dev/video1: Immediate exit requested

样张:

2012-12-13-145243

超微距拍耳棉。

2012-12-13-145258

超微距拍万用板上的过孔。默认锐化开得比较高。

2012-12-13-145003

有些时候颜色表现很糟糕,貌似光线一暗就这样。OV7725 也是这个风格。

Image-4

微距拍 TSOP-48 封装的引脚。

Image-6

微距拍贴片 LED 。微距下景深很浅,能看清板子的时候看不清 LED 。

Image-7

当看清楚 LED 时相隔不到 1mm 的基板就完全看不清了。

Image-9

IS902 主控板上过孔里残留的锡珠。右侧是 0603 封装的 MLCC 。

Image-30

微距纸张表面。

最后给出一段低光环境下拍摄的视频,效果还是很不错的,3W LED 下的整个寝室基本都能看清,毕竟有 6800mV/(Lux·s) 的灵敏度,在 FSI CMOS 里面不多见。用的是 150° 的广角镜头。 FOV150


天敏 S603HD

P1110683

10moons 的 S603HD 是一款百元内的 720P 摄像头。在市场里充斥着 VGA 产品并且把软件插值像素标得老高的今天,这已经很不容易了。

P1110685

这款摄像头带有摄像指示灯、快门键和硬件电源开关。

P1110686

背面。

P1110688

摄像头被设计成使用夹子固定。

P1110690

一颗很长的螺母充当了转轴。

P1110691

螺母特写。

P1110692

要取下摄像头主体,需要卸下脚贴下面的一颗螺丝。

P1110693

主体和夹子底座分离。

P1120144

底座上带有球状的结构使得摄像头能够自由转动。

P1110694

找不到明显的突破口,为了拆机,只好暴力拆下了前后的装饰板。

P1110696

后面的装饰板下面果然有螺丝,不过装饰板应该是向直边侧滑开才对。

P1110695

前面就没这么幸运了,这一面的装饰板是熔接死的。

P1110721

卸下前装饰板后,LED 的罩子就掉下来了。

P1110697

开壳。内部依然是黑色阻焊层的 PCB , 做工规整。

P1110698

摄像头的主控是松翰的 SN9C259 ,虽然不及理光的控制器强大,但是好歹比中星微、珏创之流要强。

P1110699

存储固件和设置的是一颗 PMC 的 Pm25LD512 型 SPI 闪存,容量 64KBytes 。

P1110700

线缆的处理还欠佳,在这点上比不上蓝色妖姬。

P1110702

来看看板子的正面。

P1110705

又是标着 1650 的 LDO 。

P1110706

炮筒晶体。

P1110704

线缆的焊点饱满,不错。

P1110723

相比之下话筒焊得非常糟糕。

P1110703

卸下镜头外的调整圈套筒。

P1110709

卸下 M12 镜头。

P1110711

仍然是 STAR LENS 的镜头,应该跟蓝色妖姬的一样。天敏官网上给出的信息显示,这个镜头组成为 2P2G + IR Cut ,视场角 ~65° ,光圈 F2.8 ,焦距 3.5mm 。参数给得这么详细自然要给个业界良心的评级了。

P1110712

卸下镜头座,露出传感器。

P1110713

传感器特写。官网的参数和板子上的丝印都说明这是 NovaTech 的 NT99140 。NovaTech 传感器的客户主要是行车记录仪一类的厂商,其资料并不公开,少数泄漏的资料里也没啥关键的参数,甚至连其网站都没找到。

比较有趣的是,天敏的官网曾经有一段时间把这些详细的参数拿掉了,不过后来又加回来了。

lsusb 和 ffmpeg 输出:

$ lsusb -vv
Bus 002 Device 019: ID 1b71:0056  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x1b71 
  idProduct          0x0056 
  bcdDevice            0.00
  iManufacturer           2 Sonix Technology Co., Ltd.
  iProduct                1 USB 2.0 Camera
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength         1991
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass         14 Video
      bFunctionSubClass       3 Video Interface Collection
      bFunctionProtocol       0 
      iFunction               5 HD 720P Webcam
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      1 Video Control
      bInterfaceProtocol      0 
      iInterface              5 HD 720P Webcam
      VideoControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdUVC               1.00
        wTotalLength           77
        dwClockFrequency       15.000000MHz
        bInCollection           1
        baInterfaceNr( 0)       1
      VideoControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             2
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               4
        iTerminal               0 
      VideoControl Interface Descriptor:
        bLength                26
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 4
        guidExtensionCode         {7033f028-1163-2e4a-ba2c-6890eb334016}
        bNumControl             8
        bNrPins                 1
        baSourceID( 0)          3
        bControlSize            1
        bmControls( 0)       0x0f
        iExtension              0 
      VideoControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Camera Sensor
        bAssocTerminal          0
        iTerminal               0 
        wObjectiveFocalLengthMin      0
        wObjectiveFocalLengthMax      0
        wOcularFocalLength            0
        bControlSize                  3
        bmControls           0x00000000
      VideoControl Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      5 (PROCESSING_UNIT)
      Warning: Descriptor too short
        bUnitID                 3
        bSourceID               1
        wMaxMultiplier          0
        bControlSize            2
        bmControls     0x0000073f
          Brightness
          Contrast
          Hue
          Saturation
          Sharpness
          Gamma
          Backlight Compensation
          Gain
          Power Line Frequency
        iProcessing             0 
        bmVideoStandards     0x20
          PAL - 525/60
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               6
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              5 HD 720P Webcam
      VideoStreaming Interface Descriptor:
        bLength                            15
        bDescriptorType                    36
        bDescriptorSubtype                  1 (INPUT_HEADER)
        bNumFormats                         2
        wTotalLength                     1643
        bEndPointAddress                  129
        bmInfo                              0
        bTerminalLink                       2
        bStillCaptureMethod                 2
        bTriggerSupport                     1
        bTriggerUsage                       1
        bControlSize                        1
        bmaControls( 0)                    11
        bmaControls( 1)                    11
      VideoStreaming Interface Descriptor:
        bLength                            11
        bDescriptorType                    36
        bDescriptorSubtype                  6 (FORMAT_MJPEG)
        bFormatIndex                        1
        bNumFrameDescriptors               15
        bFlags                              0
          Fixed-size samples: No
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x00
          Interlaced stream or variable: No
          Fields per frame: 1 fields
          Field 1 first: No
          Field pattern: Field 1 only
          bCopyProtect                      0
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         1
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1280
        wHeight                           720
        dwMinBitRate                 73751560
        dwMaxBitRate                442509360
        dwMaxVideoFrameBufferSize     1843789
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         2
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                 24599560
        dwMaxBitRate                147597360
        dwMaxVideoFrameBufferSize      614989
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         3
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           360
        dwMinBitRate                 18455560
        dwMaxBitRate                110733360
        dwMaxVideoFrameBufferSize      461389
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         4
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            544
        wHeight                           288
        dwMinBitRate                 12557320
        dwMaxBitRate                 75343920
        dwMaxVideoFrameBufferSize      313933
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         5
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            432
        wHeight                           240
        dwMinBitRate                  8294400
        dwMaxBitRate                 99532800
        dwMaxVideoFrameBufferSize      207360
        dwDefaultFrameInterval         166666
        bFrameIntervalType                  7
        dwFrameInterval( 0)            166666
        dwFrameInterval( 1)            333333
        dwFrameInterval( 2)            400000
        dwFrameInterval( 3)            500000
        dwFrameInterval( 4)            666666
        dwFrameInterval( 5)           1000000
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         6
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            352
        wHeight                           288
        dwMinBitRate                  8110080
        dwMaxBitRate                 97320960
        dwMaxVideoFrameBufferSize      202752
        dwDefaultFrameInterval         166666
        bFrameIntervalType                  7
        dwFrameInterval( 0)            166666
        dwFrameInterval( 1)            333333
        dwFrameInterval( 2)            400000
        dwFrameInterval( 3)            500000
        dwFrameInterval( 4)            666666
        dwFrameInterval( 5)           1000000
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         7
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            320
        wHeight                           240
        dwMinBitRate                  6144000
        dwMaxBitRate                 73728000
        dwMaxVideoFrameBufferSize      153600
        dwDefaultFrameInterval         166666
        bFrameIntervalType                  7
        dwFrameInterval( 0)            166666
        dwFrameInterval( 1)            333333
        dwFrameInterval( 2)            400000
        dwFrameInterval( 3)            500000
        dwFrameInterval( 4)            666666
        dwFrameInterval( 5)           1000000
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         8
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            752
        wHeight                           416
        dwMinBitRate                 25050120
        dwMaxBitRate                150300720
        dwMaxVideoFrameBufferSize      626253
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                         9
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            800
        wHeight                           448
        dwMinBitRate                 28695560
        dwMaxBitRate                172173360
        dwMaxVideoFrameBufferSize      717389
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        10
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            800
        wHeight                           600
        dwMinBitRate                 38423560
        dwMaxBitRate                230541360
        dwMaxVideoFrameBufferSize      960589
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        11
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            864
        wHeight                           480
        dwMinBitRate                 38423560
        dwMaxBitRate                230541360
        dwMaxVideoFrameBufferSize      960589
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        12
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            960
        wHeight                           544
        dwMinBitRate                 41802760
        dwMaxBitRate                250816560
        dwMaxVideoFrameBufferSize     1045069
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        13
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            960
        wHeight                           720
        dwMinBitRate                 55319560
        dwMaxBitRate                331917360
        dwMaxVideoFrameBufferSize     1382989
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        14
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1024
        wHeight                           576
        dwMinBitRate                 55319560
        dwMaxBitRate                331917360
        dwMaxVideoFrameBufferSize     1382989
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  7 (FRAME_MJPEG)
        bFrameIndex                        15
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1184
        wHeight                           656
        dwMinBitRate                 62159880
        dwMaxBitRate                372959280
        dwMaxVideoFrameBufferSize     1553997
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            78
        bDescriptorType                    36
        bDescriptorSubtype                  3 (STILL_IMAGE_FRAME)
        bEndpointAddress                    0
        bNumImageSizePatterns              18
        wWidth( 0)                       1280
        wHeight( 0)                       720
        wWidth( 1)                       1184
        wHeight( 1)                       656
        wWidth( 2)                        960
        wHeight( 2)                       720
        wWidth( 3)                       1024
        wHeight( 3)                       576
        wWidth( 4)                        960
        wHeight( 4)                       544
        wWidth( 5)                        800
        wHeight( 5)                       600
        wWidth( 6)                        864
        wHeight( 6)                       480
        wWidth( 7)                        800
        wHeight( 7)                       448
        wWidth( 8)                        752
        wHeight( 8)                       416
        wWidth( 9)                        640
        wHeight( 9)                       480
        wWidth(10)                        640
        wHeight(10)                       360
        wWidth(11)                        544
        wHeight(11)                       288
        wWidth(12)                        432
        wHeight(12)                       240
        wWidth(13)                        352
        wHeight(13)                       288
        wWidth(14)                        320
        wHeight(14)                       240
        wWidth(15)                        320
        wHeight(15)                       176
        wWidth(16)                        176
        wHeight(16)                       144
        wWidth(17)                        160
        wHeight(17)                       120
        bNumCompressionPatterns            18
      VideoStreaming Interface Descriptor:
        bLength                            27
        bDescriptorType                    36
        bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)
        bFormatIndex                        2
        bNumFrameDescriptors               15
        guidFormat                            {59555932-0000-1000-8000-00aa00389b71}
        bBitsPerPixel                      16
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x00
          Interlaced stream or variable: No
          Fields per frame: 2 fields
          Field 1 first: No
          Field pattern: Field 1 only
          bCopyProtect                      0
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         1
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                 24576000
        dwMaxBitRate                147456000
        dwMaxVideoFrameBufferSize      614400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         2
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           360
        dwMinBitRate                 18432000
        dwMaxBitRate                110592000
        dwMaxVideoFrameBufferSize      460800
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         3
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            544
        wHeight                           288
        dwMinBitRate                 12533760
        dwMaxBitRate                 75202560
        dwMaxVideoFrameBufferSize      313344
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         4
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            432
        wHeight                           240
        dwMinBitRate                  8294400
        dwMaxBitRate                 99532800
        dwMaxVideoFrameBufferSize      207360
        dwDefaultFrameInterval         166666
        bFrameIntervalType                  7
        dwFrameInterval( 0)            166666
        dwFrameInterval( 1)            333333
        dwFrameInterval( 2)            400000
        dwFrameInterval( 3)            500000
        dwFrameInterval( 4)            666666
        dwFrameInterval( 5)           1000000
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         5
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            352
        wHeight                           288
        dwMinBitRate                  8110080
        dwMaxBitRate                 97320960
        dwMaxVideoFrameBufferSize      202752
        dwDefaultFrameInterval         166666
        bFrameIntervalType                  7
        dwFrameInterval( 0)            166666
        dwFrameInterval( 1)            333333
        dwFrameInterval( 2)            400000
        dwFrameInterval( 3)            500000
        dwFrameInterval( 4)            666666
        dwFrameInterval( 5)           1000000
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            54
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         6
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            320
        wHeight                           240
        dwMinBitRate                  6144000
        dwMaxBitRate                 73728000
        dwMaxVideoFrameBufferSize      153600
        dwDefaultFrameInterval         166666
        bFrameIntervalType                  7
        dwFrameInterval( 0)            166666
        dwFrameInterval( 1)            333333
        dwFrameInterval( 2)            400000
        dwFrameInterval( 3)            500000
        dwFrameInterval( 4)            666666
        dwFrameInterval( 5)           1000000
        dwFrameInterval( 6)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            42
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         7
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            752
        wHeight                           416
        dwMinBitRate                 25026560
        dwMaxBitRate                100106240
        dwMaxVideoFrameBufferSize      625664
        dwDefaultFrameInterval         500000
        bFrameIntervalType                  4
        dwFrameInterval( 0)            500000
        dwFrameInterval( 1)            666666
        dwFrameInterval( 2)           1000000
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            42
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         8
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            800
        wHeight                           448
        dwMinBitRate                 28672000
        dwMaxBitRate                114688000
        dwMaxVideoFrameBufferSize      716800
        dwDefaultFrameInterval         500000
        bFrameIntervalType                  4
        dwFrameInterval( 0)            500000
        dwFrameInterval( 1)            666666
        dwFrameInterval( 2)           1000000
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            42
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         9
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            864
        wHeight                           480
        dwMinBitRate                 33177600
        dwMaxBitRate                132710400
        dwMaxVideoFrameBufferSize      829440
        dwDefaultFrameInterval         500000
        bFrameIntervalType                  4
        dwFrameInterval( 0)            500000
        dwFrameInterval( 1)            666666
        dwFrameInterval( 2)           1000000
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            42
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        10
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            800
        wHeight                           600
        dwMinBitRate                 38400000
        dwMaxBitRate                153600000
        dwMaxVideoFrameBufferSize      960000
        dwDefaultFrameInterval         500000
        bFrameIntervalType                  4
        dwFrameInterval( 0)            500000
        dwFrameInterval( 1)            666666
        dwFrameInterval( 2)           1000000
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            42
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        11
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            960
        wHeight                           544
        dwMinBitRate                 41779200
        dwMaxBitRate                167116800
        dwMaxVideoFrameBufferSize     1044480
        dwDefaultFrameInterval         500000
        bFrameIntervalType                  4
        dwFrameInterval( 0)            500000
        dwFrameInterval( 1)            666666
        dwFrameInterval( 2)           1000000
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            38
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        12
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1024
        wHeight                           576
        dwMinBitRate                 47185920
        dwMaxBitRate                141557760
        dwMaxVideoFrameBufferSize     1179648
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  3
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            38
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        13
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            960
        wHeight                           720
        dwMinBitRate                 55296000
        dwMaxBitRate                165888000
        dwMaxVideoFrameBufferSize     1382400
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  3
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            34
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        14
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1184
        wHeight                           656
        dwMinBitRate                 62136320
        dwMaxBitRate                124272640
        dwMaxVideoFrameBufferSize     1553408
        dwDefaultFrameInterval        1000000
        bFrameIntervalType                  2
        dwFrameInterval( 0)           1000000
        dwFrameInterval( 1)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            34
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        15
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1280
        wHeight                           720
        dwMinBitRate                 73728000
        dwMaxBitRate                147456000
        dwMaxVideoFrameBufferSize     1843200
        dwDefaultFrameInterval        1000000
        bFrameIntervalType                  2
        dwFrameInterval( 0)           1000000
        dwFrameInterval( 1)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            78
        bDescriptorType                    36
        bDescriptorSubtype                  3 (STILL_IMAGE_FRAME)
        bEndpointAddress                    0
        bNumImageSizePatterns              18
        wWidth( 0)                       1280
        wHeight( 0)                       720
        wWidth( 1)                       1184
        wHeight( 1)                       656
        wWidth( 2)                        960
        wHeight( 2)                       720
        wWidth( 3)                       1024
        wHeight( 3)                       576
        wWidth( 4)                        960
        wHeight( 4)                       544
        wWidth( 5)                        800
        wHeight( 5)                       600
        wWidth( 6)                        864
        wHeight( 6)                       480
        wWidth( 7)                        800
        wHeight( 7)                       448
        wWidth( 8)                        752
        wHeight( 8)                       416
        wWidth( 9)                        640
        wHeight( 9)                       480
        wWidth(10)                        640
        wHeight(10)                       360
        wWidth(11)                        544
        wHeight(11)                       288
        wWidth(12)                        432
        wHeight(12)                       240
        wWidth(13)                        352
        wHeight(13)                       288
        wWidth(14)                        320
        wHeight(14)                       240
        wWidth(15)                        320
        wHeight(15)                       176
        wWidth(16)                        176
        wHeight(16)                       144
        wWidth(17)                        160
        wHeight(17)                       120
        bNumCompressionPatterns            18
      VideoStreaming Interface Descriptor:
        bLength                             6
        bDescriptorType                    36
        bDescriptorSubtype                 13 (COLORFORMAT)
        bColorPrimaries                     1 (BT.709,sRGB)
        bTransferCharacteristics            1 (BT.709)
        bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0080  1x 128 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0100  1x 256 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0320  1x 800 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       4
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0b20  2x 800 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       5
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1320  3x 800 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       6
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1400  3x 1024 bytes
        bInterval               1
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         2
      bInterfaceCount         2
      bFunctionClass          1 Audio
      bFunctionSubClass       0 
      bFunctionProtocol       0 
      iFunction               4 USB Microphone
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      1 Control Device
      bInterfaceProtocol      0 
      iInterface              4 USB Microphone
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength           41
        bInCollection           1
        baInterfaceNr( 0)       3
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Microphone
        bAssocTerminal          0
        bNrChannels             1
        wChannelConfig     0x0000
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 2
        bSourceID               1
        bControlSize            2
        bmaControls( 0)      0x01
        bmaControls( 0)      0x00
          Mute Control
        bmaControls( 1)      0x02
        bmaControls( 1)      0x00
          Volume Control
        iFeature                0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               2
        iTerminal               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           3
        bDelay                  1 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                29
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             1
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            7 Discrete
        tSamFreq[ 0]         8000
        tSamFreq[ 1]        11025
        tSamFreq[ 2]        16000
        tSamFreq[ 3]        22050
        tSamFreq[ 4]        24000
        tSamFreq[ 5]        44100
        tSamFreq[ 6]        48000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0190  1x 400 bytes
        bInterval               4
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         0 Undefined
          wLockDelay              0 Undefined
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0002
  (Bus Powered)
  Remote Wakeup Enabled
$ avconv -f video4linux2 -list_formats all -i /dev/video1
avconv version 0.8.4-4:0.8.4-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Nov  6 2012 16:51:33 with gcc 4.6.3
[video4linux2 @ 0x2153ba0] C :     mjpeg :                MJPEG : 1280x720 640x480 640x360 544x288 432x240 352x288 320x240 752x416 800x448 800x600 864x480 960x544 960x720 1024x576 1184x656
[video4linux2 @ 0x2153ba0] R :   yuyv422 :     YUV 4:2:2 (YUYV) : 640x480 640x360 544x288 432x240 352x288 320x240 752x416 800x448 864x480 800x600 960x544 1024x576 960x720 1184x656 1280x720
/dev/video1: Immediate exit requested

样张:

Image-15

成像还算清晰自然,虽然边缘处色差很明显。

Image-17

微距拍摄纸张。

Image-21

微距拍摄锡泊贴纸。

Image-25

图像递归……

Image-23

微距拍一个打过胶的电解电容顶部。暗处的噪声水平一般。

这个摄像头在 1280×720 的分辨率下可提供 30fps 的帧率,而 432×240 及以下分辨率帧率则可达 60fps ,和 50Hz 交流电造成的灯具频闪形成了 10Hz 左右的拍频,视频样本如下:capture-1


天敏 D805HD

P1120085

天敏的 D805HD 是百元以内市场上唯一一款硬件像素数超过 130 万的产品,达到了 UXGA ( 1600×1200 ,192 万)的水平。

P1120086

摄像头的底部是一个塑胶大吸盘,但是说实话没啥用,吸力不强。卸下四个螺丝可以拆开底座。

P1120087

USB 电缆通过底座和长长的杆子连接到主机上。

P1120090

白色钢琴烤漆质感的风格。

P1120091

主体和连杆间的转轴处。

P1120094

主机后面,各种金属网,搞得跟麦克风一样。

P1120096

前面是镜头,其实还是 M12 接口的,之所以这么大是因为外壳大的缘故。

镜头上煞有介事地标着“ OPTICAL GLASS LENS F/1.8 F=3mm ”。官网还给出了视场角 60° ,以及 2P2G + IR Cut 的组成。没有 STAR LENS 的标,比前面的镜头略长。

P1120097

拆开底座。

P1120098

不动烙铁的话电缆就抽不出来了。

P1120099

依然是大螺母做轴承。

P1120102

取下镜头的外壳。

P1120104

卸下螺丝,打开 外壳。

P1120106

镜头外壳里外共有三层,这样调焦时不会感觉到镜头伸缩。

P1120108

主板背面。依然是黑色的阻焊剂。整个布局十分紧凑,晶体和话筒只好焊得如此飘逸了。

P1120113

依然是标着 1650 的不明 IC 。

P1120115

依然是 12.000MHz 的炮筒晶体。

P1120116

依然是松翰的 SN9C259 。能扛住 UXGA 及以上分辨率的 UVC 控制器实在不多见。

P1120117

依然是 Pm25LD512 。

P1120110

正面,这回线缆打胶了。

P1120111

去掉镜头座。

P1120121

板子上的丝印,注明了传感器和控制器。

P1120126

OV2643 传感器,虽为前照式但是灵敏度还说得过去,有 1250mV/(Lux·s)  的灵敏度,光学尺寸 1/4 英寸。

P1120112

主体尾部的金属网里面藏了一颗螺丝。

P1120153

金属网是拿双面胶粘上去的,可以撬下来。

P1120155

卸下螺丝,剩下的塑料圈和金属网也下来了。

P1120166

尾部内部结构,空空如也,纯粹保持平衡和美观用的。

lsusb 和 ffmpeg 输出:

$ lsusb -vv
Bus 002 Device 008: ID 1b71:0051
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x1b71
  idProduct          0x0051
  bcdDevice            0.00
  iManufacturer           2 Sonix Technology Co., Ltd.
  iProduct                1 USB 2.0 Camera
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          857
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass         14 Video
      bFunctionSubClass       3 Video Interface Collection
      bFunctionProtocol       0
      iFunction               5 USB Camera
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      1 Video Control
      bInterfaceProtocol      0
      iInterface              5 USB Camera
      VideoControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdUVC               1.00
        wTotalLength           77
        dwClockFrequency       15.000000MHz
        bInCollection           1
        baInterfaceNr( 0)       1
      VideoControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             2
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               4
        iTerminal               0 
      VideoControl Interface Descriptor:
        bLength                26
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 4
        guidExtensionCode         {7033f028-1163-2e4a-ba2c-6890eb334016}
        bNumControl             8
        bNrPins                 1
        baSourceID( 0)          3
        bControlSize            1
        bmControls( 0)       0x0f
        iExtension              0 
      VideoControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Camera Sensor
        bAssocTerminal          0
        iTerminal               0 
        wObjectiveFocalLengthMin      0
        wObjectiveFocalLengthMax      0
        wOcularFocalLength            0
        bControlSize                  3
        bmControls           0x00002a0e
          Auto-Exposure Mode
          Auto-Exposure Priority
          Exposure Time (Absolute)
          Zoom (Absolute)
          PanTilt (Absolute)
          Roll (Absolute)
      VideoControl Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      5 (PROCESSING_UNIT)
      Warning: Descriptor too short
        bUnitID                 3
        bSourceID               1
        wMaxMultiplier          0
        bControlSize            2
        bmControls     0x0000177f
          Brightness
          Contrast
          Hue
          Saturation
          Sharpness
          Gamma
          White Balance Temperature
          Backlight Compensation
          Gain
          Power Line Frequency
          White Balance Temperature, Auto
        iProcessing             0 
        bmVideoStandards     0x 0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               6
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              5 USB Camera
      VideoStreaming Interface Descriptor:
        bLength                            14
        bDescriptorType                    36
        bDescriptorSubtype                  1 (INPUT_HEADER)
        bNumFormats                         1
        wTotalLength                      509
        bEndPointAddress                  129
        bmInfo                              0
        bTerminalLink                       2
        bStillCaptureMethod                 2
        bTriggerSupport                     1
        bTriggerUsage                       1
        bControlSize                        1
        bmaControls( 0)                    27
      VideoStreaming Interface Descriptor:
        bLength                            27
        bDescriptorType                    36
        bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)
        bFormatIndex                        1
        bNumFrameDescriptors               10
        guidFormat                            {59555932-0000-1000-8000-00aa00389b71}
        bBitsPerPixel                      16
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x00
          Interlaced stream or variable: No
          Fields per frame: 2 fields
          Field 1 first: No
          Field pattern: Field 1 only
          bCopyProtect                      0
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         1
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                 24576000
        dwMaxBitRate                147456000
        dwMaxVideoFrameBufferSize      614400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         2
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           360
        dwMinBitRate                 18432000
        dwMaxBitRate                110592000
        dwMaxVideoFrameBufferSize      460800
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         3
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            320
        wHeight                           240
        dwMinBitRate                  6144000
        dwMaxBitRate                 36864000
        dwMaxVideoFrameBufferSize      153600
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            50
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         4
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            320
        wHeight                           184
        dwMinBitRate                  4710400
        dwMaxBitRate                 28262400
        dwMaxVideoFrameBufferSize      117760
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  6
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            400000
        dwFrameInterval( 2)            500000
        dwFrameInterval( 3)            666666
        dwFrameInterval( 4)           1000000
        dwFrameInterval( 5)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            42
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         5
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            800
        wHeight                           456
        dwMinBitRate                 29184000
        dwMaxBitRate                116736000
        dwMaxVideoFrameBufferSize      729600
        dwDefaultFrameInterval         500000
        bFrameIntervalType                  4
        dwFrameInterval( 0)            500000
        dwFrameInterval( 1)            666666
        dwFrameInterval( 2)           1000000
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            42
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         6
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            800
        wHeight                           600
        dwMinBitRate                 38400000
        dwMaxBitRate                153600000
        dwMaxVideoFrameBufferSize      960000
        dwDefaultFrameInterval         500000
        bFrameIntervalType                  4
        dwFrameInterval( 0)            500000
        dwFrameInterval( 1)            666666
        dwFrameInterval( 2)           1000000
        dwFrameInterval( 3)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            38
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         7
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1280
        wHeight                           720
        dwMinBitRate                 73728000
        dwMaxBitRate                221184000
        dwMaxVideoFrameBufferSize     1843200
        dwDefaultFrameInterval         666666
        bFrameIntervalType                  3
        dwFrameInterval( 0)            666666
        dwFrameInterval( 1)           1000000
        dwFrameInterval( 2)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            34
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         8
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1280
        wHeight                           960
        dwMinBitRate                 98304000
        dwMaxBitRate                176947200
        dwMaxVideoFrameBufferSize     2457600
        dwDefaultFrameInterval        1111111
        bFrameIntervalType                  2
        dwFrameInterval( 0)           1111111
        dwFrameInterval( 1)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         9
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1600
        wHeight                           904
        dwMinBitRate                115712000
        dwMaxBitRate                115712000
        dwMaxVideoFrameBufferSize     2892800
        dwDefaultFrameInterval        2000000
        bFrameIntervalType                  1
        dwFrameInterval( 0)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                        10
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1600
        wHeight                          1200
        dwMinBitRate                153600000
        dwMaxBitRate                153600000
        dwMaxVideoFrameBufferSize     3840000
        dwDefaultFrameInterval        2000000
        bFrameIntervalType                  1
        dwFrameInterval( 0)           2000000
      VideoStreaming Interface Descriptor:
        bLength                            46
        bDescriptorType                    36
        bDescriptorSubtype                  3 (STILL_IMAGE_FRAME)
        bEndpointAddress                    0
        bNumImageSizePatterns              10
        wWidth( 0)                       1600
        wHeight( 0)                      1200
        wWidth( 1)                       1600
        wHeight( 1)                       900
        wWidth( 2)                       1280
        wHeight( 2)                       960
        wWidth( 3)                       1280
        wHeight( 3)                       720
        wWidth( 4)                        800
        wHeight( 4)                       600
        wWidth( 5)                        800
        wHeight( 5)                       450
        wWidth( 6)                        640
        wHeight( 6)                       480
        wWidth( 7)                        640
        wHeight( 7)                       360
        wWidth( 8)                        320
        wHeight( 8)                       240
        wWidth( 9)                        320
        wHeight( 9)                       180
        bNumCompressionPatterns            10
      VideoStreaming Interface Descriptor:
        bLength                             6
        bDescriptorType                    36
        bDescriptorSubtype                 13 (COLORFORMAT)
        bColorPrimaries                     1 (BT.709,sRGB)
        bTransferCharacteristics            1 (BT.709)
        bMatrixCoefficients                 4 (SMPTE 170M (BT.601))
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0080  1x 128 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0100  1x 256 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0320  1x 800 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       4
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0b20  2x 800 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       5
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1320  3x 800 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       6
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1400  3x 1024 bytes
        bInterval               1
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         2
      bInterfaceCount         2
      bFunctionClass          1 Audio
      bFunctionSubClass       0 
      bFunctionProtocol       0 
      iFunction               4 USB Microphone
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      1 Control Device
      bInterfaceProtocol      0 
      iInterface              4 USB Microphone
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength           41
        bInCollection           1
        baInterfaceNr( 0)       3
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Microphone
        bAssocTerminal          0
        bNrChannels             1
        wChannelConfig     0x0000
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 2
        bSourceID               1
        bControlSize            2
        bmaControls( 0)      0x01
        bmaControls( 0)      0x00
          Mute Control
        bmaControls( 1)      0x02
        bmaControls( 1)      0x00
          Volume Control
        iFeature                0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               2
        iTerminal               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           3
        bDelay                  1 frames
        wFormatTag              1 PCM
      AudioStreaming Interface Descriptor:
        bLength                29
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             1
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            7 Discrete
        tSamFreq[ 0]         8000
        tSamFreq[ 1]        11025
        tSamFreq[ 2]        16000
        tSamFreq[ 3]        22050
        tSamFreq[ 4]        24000
        tSamFreq[ 5]        44100
        tSamFreq[ 6]        48000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x0190  1x 400 bytes
        bInterval               4
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         0 Undefined
          wLockDelay              0 Undefined
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0002
  (Bus Powered)
  Remote Wakeup Enabled
$ avconv -f video4linux2 -list_formats all -i /dev/video1
avconv version 0.8.4-4:0.8.4-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Nov  6 2012 16:51:33 with gcc 4.6.3
[video4linux2 @ 0x20d3ba0] R :   yuyv422 :     YUV 4:2:2 (YUYV) : 640x480 640x360 320x240 320x184 800x456 800x600 1280x720 1280x960 1600x904 1600x1200
/dev/video1: Immediate exit requested

样张:

Image-35-web

微距拍屏幕(未借助其他器材)。

Image-36-web

成像质量不错,各个地方都很清晰,而且噪声不明显。


写了这么长,浏览器已经非常卡了……

Bonus:

Corner1

Corner2

OV7740 显微照片,Xperia U 配合读数显微镜拍摄。

Array

OV7725 显微照片,疑似可以看到微透镜阵列。工具同上。

Edge1

Egde2

NT99140 显微照片,工具同上。

Corner

OV2643 显微照片,工具同上。

Acer Aspire 4741G 机内 130 万摄像头的 lsusb 和 ffmpeg 输出(暂时不打算拆开屏幕看本尊):

$ lsusb -vv
Bus 002 Device 003: ID 0402:9665 ALi Corp. Gateway Webcam
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x0402 ALi Corp.
  idProduct          0x9665 Gateway Webcam
  bcdDevice            0.09
  iManufacturer           3 XPA240SXX
  iProduct                1 1.3M WebCam
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          349
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass         14 Video
      bFunctionSubClass       3 Video Interface Collection
      bFunctionProtocol       0 
      iFunction               1 1.3M WebCam
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      1 Video Control
      bInterfaceProtocol      0 
      iInterface              1 1.3M WebCam
      VideoControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdUVC               1.00
        wTotalLength           85
        dwClockFrequency       30.000000MHz
        bInCollection           1
        baInterfaceNr( 0)       1
      VideoControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Camera Sensor
        bAssocTerminal          0
        iTerminal               0 
        wObjectiveFocalLengthMin      0
        wObjectiveFocalLengthMax      0
        wOcularFocalLength            0
        bControlSize                  3
        bmControls           0x00000000
      VideoControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID               6
        iTerminal               0 
      VideoControl Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      4 (SELECTOR_UNIT)
        bUnitID                 4
        bNrInPins               1
        baSource( 0)            1
        iSelector               0 
      VideoControl Interface Descriptor:
        bLength                11
        bDescriptorType        36
        bDescriptorSubtype      5 (PROCESSING_UNIT)
      Warning: Descriptor too short
        bUnitID                 5
        bSourceID               4
        wMaxMultiplier          0
        bControlSize            2
        bmControls     0x0000053f
          Brightness
          Contrast
          Hue
          Saturation
          Sharpness
          Gamma
          Backlight Compensation
          Power Line Frequency
        iProcessing             0 
        bmVideoStandards     0x1b
          None
          NTSC - 525/60
          SECAM - 625/50
          NTSC - 625/50
      VideoControl Interface Descriptor:
        bLength                27
        bDescriptorType        36
        bDescriptorSubtype      6 (EXTENSION_UNIT)
        bUnitID                 6
        guidExtensionCode         {564c97a7-7ea7-904b-8cbf-1c71ec303000}
        bNumControl            16
        bNrPins                 1
        baSourceID( 0)          5
        bControlSize            2
        bmControls( 0)       0xff
        bmControls( 1)       0xff
        iExtension              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              15
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      VideoStreaming Interface Descriptor:
        bLength                            14
        bDescriptorType                    36
        bDescriptorSubtype                  1 (INPUT_HEADER)
        bNumFormats                         1
        wTotalLength                      169
        bEndPointAddress                  129
        bmInfo                              0
        bTerminalLink                       3
        bStillCaptureMethod                 0
        bTriggerSupport                     0
        bTriggerUsage                       0
        bControlSize                        1
        bmaControls( 0)                    27
      VideoStreaming Interface Descriptor:
        bLength                            27
        bDescriptorType                    36
        bDescriptorSubtype                  4 (FORMAT_UNCOMPRESSED)
        bFormatIndex                        1
        bNumFrameDescriptors                4
        guidFormat                            {59555932-0000-1000-8000-00aa00389b71}
        bBitsPerPixel                      16
        bDefaultFrameIndex                  1
        bAspectRatioX                       0
        bAspectRatioY                       0
        bmInterlaceFlags                 0x00
          Interlaced stream or variable: No
          Fields per frame: 2 fields
          Field 1 first: No
          Field pattern: Field 1 only
          bCopyProtect                      0
      VideoStreaming Interface Descriptor:
        bLength                            34
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         1
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            640
        wHeight                           480
        dwMinBitRate                 73728000
        dwMaxBitRate                147456000
        dwMaxVideoFrameBufferSize      614400
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  2
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            666666
      VideoStreaming Interface Descriptor:
        bLength                            34
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         2
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                            320
        wHeight                           240
        dwMinBitRate                 18432000
        dwMaxBitRate                 36864000
        dwMaxVideoFrameBufferSize      153600
        dwDefaultFrameInterval         333333
        bFrameIntervalType                  2
        dwFrameInterval( 0)            333333
        dwFrameInterval( 1)            666666
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         3
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1280
        wHeight                           800
        dwMinBitRate                122880000
        dwMaxBitRate                122880000
        dwMaxVideoFrameBufferSize     2048000
        dwDefaultFrameInterval        1333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)           1333333
      VideoStreaming Interface Descriptor:
        bLength                            30
        bDescriptorType                    36
        bDescriptorSubtype                  5 (FRAME_UNCOMPRESSED)
        bFrameIndex                         4
        bmCapabilities                   0x00
          Still image unsupported
        wWidth                           1280
        wHeight                          1024
        dwMinBitRate                157286400
        dwMaxBitRate                157286400
        dwMaxVideoFrameBufferSize     2621440
        dwDefaultFrameInterval        1333333
        bFrameIntervalType                  1
        dwFrameInterval( 0)           1333333
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1400  3x 1024 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1400  3x 1024 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      2 Video Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            5
          Transfer Type            Isochronous
          Synch Type               Asynchronous
          Usage Type               Data
        wMaxPacketSize     0x1400  3x 1024 bytes
        bInterval               1
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)
$ avconv -f video4linux2 -list_formats all -i /dev/video0
avconv version 0.8.5-4:0.8.5-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Jan 24 2013 18:01:36 with gcc 4.6.3
[video4linux2 @ 0x1769ba0] R :   yuyv422 :     YUV 4:2:2 (YUYV) : 640x480 320x240 1280x800 1280x1024
/dev/video0: Immediate exit requested

样张两张,感受下渣画质:

guvcview_image-1

guvcview_image-2

更新:由于老本( 4741G )子退役,所以还是拆开屏幕取出了不需要的组件。于是,现在就有该摄像头模块的照片了。

P1140156

模块为建兴/光宝代工,型号似乎是 09P2SF119 ,在屏幕上的固定非常简单,没有用螺丝或者卡口。

P1140161

拿下该模块。

P1140162

扬智的 M5608C 主控,无资料可查。作为 Acer Lab Inc. ,为宏碁造造芯片没啥好奇怪的。

P1140163

USB 输入出的共模、差模电感以及 MLCC 。旁边是 12MHz 的晶体。

P1140165

USB 连接器。

P1140166

疑似 LDO 。

P1140167

固件版本贴纸。

P1140171

撕去贴之后发现是 Microchip 的 24LC64 EEPROM 。

P1140168

丝印标记,这是整块板子唯一一处丝印。

P1140169

镜头组件,有用胶水粘住。

P1140170

背面光溜溜的啥也没有。

《一箩筐 UVC 摄像头》有26个想法

    1. 你是要做基于 8051 的 UVC 摄像头还是要把摄像头的输出作为 8051 的输入?
      如果是后者的话,几乎所有的 DVP 接口 CMOS 传感器加上 FIFO 以后都是可以的。淘宝上面这样的板子应该不少,至少有 SiLabs 家的 C8051 的。

    1. 不可能啊,UVC 摄像头应该都支持的。内核模块是 uvcvideo ,如果 udev 的配置没问题的话,插上以后应该可以看到 /dev/video* 。看看内核输出?

      1. 呃。。其实我完全是菜鸟。。。的确看到有video0,但是怎么测试是否能正常工作呢(是在一个嵌入式开发板上)之前找到一个好像是利用V4L2+QT的程序(在虚拟机ubuntu下面是可以用的),但是下载到开发板之后运行报错,无法打开摄像头。。。然后看到网上有个人说利用cat /dev/video0 > /tmp/1.jpg 这样确实可以得到一个文件,但是有50多M而且也没法打开。。。求前辈指点啊!

          1. FFmpeg version UNKNOWN, Copyright (c) 2000-2011 the FFmpeg developers
            built on Jul 5 2012 09:40:05 with gcc 4.4.2
            configuration: –prefix=/usr/local/mplayer –host-cc=gcc –cc=unicore32-linux-gcc –arch=unicore32 –enable-cross-compile –target-os=linux –enable-gpl –enable-postproc –disable-stripping –enable-shared –disable-static –extra-cflags=’-I./libhantro/source/inc -I./libhantro/source/mpeg4/ -I./libhantro/source/h264high/ -I./libhantro/source/h264high/legacy -I./libhantro/source/common/swhw -I./libhantro/source/config -I./libhantro/linux/h264high/ -I./libhantro/source/common ‘
            libavutil 50. 40. 1 / 50. 40. 1
            libavcodec 52.117. 0 / 52.117. 0
            libavformat 52.106. 0 / 52.106. 0
            libavdevice 52. 4. 0 / 52. 4. 0
            libavfilter 1. 77. 1 / 1. 77. 1
            libswscale 0. 13. 0 / 0. 13. 0
            libpostproc 51. 2. 0 / 51. 2. 0

            卡在这里不动了。。。

  1. 博主动手能力好厉害。我对硬件一窍不通,有个问题请教一下,我要通过人体红外成像的原始数据(是raw吗),如果是,如何才能获取raw格式的数据?有没有可能获取每一个像素在不同曝光时间内的电信号数据,或者干脆是模拟信号数据?谢谢。
    如果有可能,帮助我在raspberry上搞一个,材料费和工时分算。

      1. 对了,不是要求成像,只要能对目标温度(如提问)近距离敏感,比如1-2米的距离,即可。普通的cmos或ccd能做到吗?
        谢谢

  2. 你好
    我最近在做一款红外camera Optris PI160的应用,但是在Linux下没有驱动,使用UVC驱动 获得图像数据很诡异。
    root@ubuntu:/opt/testfolder2# ./usbcapture
    camera device is open OK ! camera name is /dev/video0
    /dev/video0 is a video capture device!
    /dev/video0 does not support read i/o
    /dev/video0 supports streaming i/o method!
    The driver name is uvcvideo
    The device name is PI-IMAGER
    The device bus is usb-0000:02:03.0-1
    Support format:
    1.YUV 4:2:2 (YUYV)
    VIDIOC_G_CROP:: Invalid argument
    fault_pixel width = 160
    fault_pixel_height = 121
    fault_pixelformat = 56595559
    fault_sizeimage = 38720
    最后获得数据中间总是有0x3f
    bb 3f c2 3f c1 3f c1 3f c1 3f c1 3f c1 3f c2 3f c2 3f c2 3f c2 3f c3 3f c2 3f c2 3f c2 3f c2 3f c3 3f c2 3f c3 3f c3 3f c2 3f c3 3f c3 3f c3 3f
    请问,您知道这个怎么恢复图像吗?? 谢谢

  3. 楼主你好,市场上所有的USB摄像头都是ISO传输的吗,我的板子不支持高速ISO模式,所以在找一款可以支持bulk模式的摄像头,这样的东西市场上存在吗?

  4. -,- 最近项目需要,采集YUV格式时分辨率能达800*600且帧率30的USB摄像头,楼主有遇到过吗。YUV和帧率30是不能让步的,分辨率越高越好。

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