Hi On Tue, Oct 30, 2018 at 4:49 PM Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx> wrote: > > Hi Jiri, > > On 30/10/2018 14:36, Jiri Slaby wrote: > > Hi, > > > > I have a Dell Lattitude 7280 with two webcams. The standard one works > > fine (/dev/video0). The other one is an IR camera (/dev/video1). The > > camera proper works fine and produces 340x374 frames. But there is an IR > > led supposed to light the object. The video is 30fps, but the LED seems > > to emit light only on half of the frames, i.e. on every second frame (15 > > fps). This makes the video blink a lot. The two consecutive frames look > > like: > > https://www.fi.muni.cz/~xslaby/sklad/mpv-shot0002.jpg > > https://www.fi.muni.cz/~xslaby/sklad/mpv-shot0003.jpg > > > > Do you have any ideas what to check/test? > > I have an HP Spectre with IR camera, and it also 'flashes' alternate frames. > > I assumed this was something to do with controlling the lighting for > face recognition some how. I think Kieran is right here. A very common way of detecting what is close to the camera is using NIR LEDs due to how directional they are. The algorithm is more or less: You have a camera with a NIR filter (the rbg camera) and a camera without. You alternate the NIR LEDs and substract both images. The results are the object on the front. You use that information to get what is in on the front of the RGB camera (unaffected by the NIR leds). Around 10 years ago we were using this approach for segmentation of body parts. It worked like a charm for getting biometrical parameters and detect gestures https://repositorio.uam.es/bitstream/handle/10486/664236/biometric_morales_LNCS_2009_ps.pdf?sequence=3&isAllowed=y Cheers! > > I'm fairly sure we don't control the 'IR flash' from the UVC. > > I wonder if there is a control parameter for the IR led in the > extension-units? > > -- > Regards > > Kieran > > > > > $ v4l2-ctl --all -d /dev/video2 > > Driver Info (not using libv4l2): > > Driver name : uvcvideo > > Card type : Integrated_Webcam_HD: Integrate > > Bus info : usb-0000:00:14.0-5 > > Driver version: 4.18.15 > > Capabilities : 0x84A00001 > > Video Capture > > Metadata Capture > > Streaming > > Extended Pix Format > > Device Capabilities > > Device Caps : 0x04200001 > > Video Capture > > Streaming > > Extended Pix Format > > Priority: 2 > > Video input : 0 (Camera 11: ok) > > Format Video Capture: > > Width/Height : 340/374 > > Pixel Format : 'YUYV' > > Field : None > > Bytes per Line : 680 > > Size Image : 254320 > > Colorspace : sRGB > > Transfer Function : Default (maps to sRGB) > > YCbCr/HSV Encoding: Default (maps to ITU-R 601) > > Quantization : Default (maps to Limited Range) > > Flags : > > Crop Capability Video Capture: > > Bounds : Left 0, Top 0, Width 340, Height 374 > > Default : Left 0, Top 0, Width 340, Height 374 > > Pixel Aspect: 1/1 > > Selection: crop_default, Left 0, Top 0, Width 340, Height 374 > > Selection: crop_bounds, Left 0, Top 0, Width 340, Height 374 > > Streaming Parameters Video Capture: > > Capabilities : timeperframe > > Frames per second: 30.000 (30/1) > > Read buffers : 0 > > > > > > > > > > > > $ lsusb -vs 1:3 > > Bus 001 Device 003: ID 0bda:5691 Realtek Semiconductor Corp. > > Device Descriptor: > > bLength 18 > > bDescriptorType 1 > > bcdUSB 2.00 > > bDeviceClass 239 Miscellaneous Device > > bDeviceSubClass 2 > > bDeviceProtocol 1 Interface Association > > bMaxPacketSize0 64 > > idVendor 0x0bda Realtek Semiconductor Corp. > > idProduct 0x5691 > > bcdDevice 60.12 > > iManufacturer 3 CNFGE16N5214300025C2 > > iProduct 1 Integrated_Webcam_HD > > iSerial 2 0001 > > bNumConfigurations 1 > > Configuration Descriptor: > > bLength 9 > > bDescriptorType 2 > > wTotalLength 1041 > > bNumInterfaces 4 > > bConfigurationValue 1 > > iConfiguration 4 USB Camera > > bmAttributes 0x80 > > (Bus Powered) > > MaxPower 500mA > > ** UNRECOGNIZED: 28 ff 42 49 53 54 00 01 06 06 10 00 00 00 00 00 01 > > 07 f4 01 02 08 f4 01 03 09 f4 01 04 0a f4 01 05 0b f4 01 06 0c e8 03 > > Interface Association: > > bLength 8 > > bDescriptorType 11 > > bFirstInterface 0 > > bInterfaceCount 2 > > bFunctionClass 14 Video > > bFunctionSubClass 3 Video Interface Collection > > bFunctionProtocol 0 > > iFunction 5 Integrated Webcam > > Interface Descriptor: > > bLength 9 > > bDescriptorType 4 > > bInterfaceNumber 0 > > bAlternateSetting 0 > > bNumEndpoints 1 > > bInterfaceClass 14 Video > > bInterfaceSubClass 1 Video Control > > bInterfaceProtocol 0 > > iInterface 5 Integrated Webcam > > VideoControl Interface Descriptor: > > bLength 13 > > bDescriptorType 36 > > bDescriptorSubtype 1 (HEADER) > > bcdUVC 1.00 > > wTotalLength 107 > > dwClockFrequency 15.000000MHz > > 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 11 > > bDescriptorType 36 > > bDescriptorSubtype 5 (PROCESSING_UNIT) > > Warning: Descriptor too short > > bUnitID 2 > > 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 0x09 > > None > > SECAM - 625/50 > > VideoControl Interface Descriptor: > > bLength 9 > > bDescriptorType 36 > > bDescriptorSubtype 3 (OUTPUT_TERMINAL) > > bTerminalID 3 > > wTerminalType 0x0101 USB Streaming > > bAssocTerminal 0 > > bSourceID 4 > > iTerminal 0 > > VideoControl Interface Descriptor: > > bLength 27 > > bDescriptorType 36 > > bDescriptorSubtype 6 (EXTENSION_UNIT) > > bUnitID 4 > > guidExtensionCode {1229a78c-47b4-4094-b0ce-db07386fb938} > > bNumControl 2 > > bNrPins 1 > > baSourceID( 0) 7 > > bControlSize 2 > > bmControls( 0) 0x00 > > bmControls( 1) 0x06 > > iExtension 0 > > VideoControl Interface Descriptor: > > bLength 29 > > bDescriptorType 36 > > bDescriptorSubtype 6 (EXTENSION_UNIT) > > bUnitID 7 > > guidExtensionCode {0fb885c3-68c2-4547-90f7-8f47579d95fc} > > bNumControl 0 > > bNrPins 1 > > baSourceID( 0) 2 > > bControlSize 4 > > bmControls( 0) 0x0f > > bmControls( 1) 0x00 > > bmControls( 2) 0x00 > > bmControls( 3) 0x00 > > iExtension 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 0 > > VideoStreaming Interface Descriptor: > > bLength 15 > > bDescriptorType 36 > > bDescriptorSubtype 1 (INPUT_HEADER) > > bNumFormats 2 > > wTotalLength 395 > > bEndPointAddress 129 > > bmInfo 0 > > bTerminalLink 3 > > bStillCaptureMethod 1 > > bTriggerSupport 1 > > bTriggerUsage 0 > > bControlSize 1 > > bmaControls( 0) 0 > > bmaControls( 1) 0 > > VideoStreaming Interface Descriptor: > > bLength 11 > > bDescriptorType 36 > > bDescriptorSubtype 6 (FORMAT_MJPEG) > > bFormatIndex 1 > > bNumFrameDescriptors 5 > > bFlags 1 > > Fixed-size samples: Yes > > 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 30 > > bDescriptorType 36 > > bDescriptorSubtype 7 (FRAME_MJPEG) > > 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 7 (FRAME_MJPEG) > > bFrameIndex 2 > > bmCapabilities 0x01 > > Still image supported > > wWidth 1280 > > wHeight 720 > > dwMinBitRate 442368000 > > dwMaxBitRate 442368000 > > dwMaxVideoFrameBufferSize 1843200 > > 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 960 > > wHeight 540 > > dwMinBitRate 248832000 > > dwMaxBitRate 248832000 > > dwMaxVideoFrameBufferSize 1036800 > > 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 848 > > wHeight 480 > > dwMinBitRate 195379200 > > dwMaxBitRate 195379200 > > dwMaxVideoFrameBufferSize 814080 > > 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 640 > > wHeight 360 > > dwMinBitRate 110592000 > > dwMaxBitRate 110592000 > > dwMaxVideoFrameBufferSize 460800 > > dwDefaultFrameInterval 333333 > > bFrameIntervalType 1 > > dwFrameInterval( 0) 333333 > > 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)) > > VideoStreaming Interface Descriptor: > > bLength 27 > > bDescriptorType 36 > > bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED) > > bFormatIndex 2 > > bNumFrameDescriptors 6 > > guidFormat > > {32595559-0000-0010-8000-00aa00389b71} > > 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 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 640 > > wHeight 360 > > dwMinBitRate 110592000 > > dwMaxBitRate 110592000 > > dwMaxVideoFrameBufferSize 460800 > > 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 424 > > wHeight 240 > > dwMinBitRate 48844800 > > dwMaxBitRate 48844800 > > dwMaxVideoFrameBufferSize 203520 > > 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 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 5 > > bmCapabilities 0x01 > > Still image supported > > wWidth 320 > > wHeight 180 > > dwMinBitRate 27648000 > > dwMaxBitRate 27648000 > > dwMaxVideoFrameBufferSize 115200 > > dwDefaultFrameInterval 333333 > > bFrameIntervalType 1 > > dwFrameInterval( 0) 333333 > > VideoStreaming Interface Descriptor: > > bLength 30 > > bDescriptorType 36 > > bDescriptorSubtype 5 (FRAME_UNCOMPRESSED) > > bFrameIndex 6 > > bmCapabilities 0x01 > > Still image supported > > wWidth 160 > > wHeight 120 > > dwMinBitRate 9216000 > > dwMaxBitRate 9216000 > > dwMaxVideoFrameBufferSize 38400 > > dwDefaultFrameInterval 333333 > > bFrameIntervalType 1 > > dwFrameInterval( 0) 333333 > > 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 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 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 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 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 0x81 EP 1 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 0x81 EP 1 IN > > bmAttributes 5 > > Transfer Type Isochronous > > Synch Type Asynchronous > > Usage Type Data > > wMaxPacketSize 0x13aa 3x 938 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 0x1400 3x 1024 bytes > > bInterval 1 > > Interface Association: > > bLength 8 > > bDescriptorType 11 > > bFirstInterface 2 > > bInterfaceCount 2 > > bFunctionClass 14 Video > > bFunctionSubClass 3 Video Interface Collection > > bFunctionProtocol 0 > > iFunction 6 Integrated Webcam > > Interface Descriptor: > > bLength 9 > > bDescriptorType 4 > > bInterfaceNumber 2 > > bAlternateSetting 0 > > bNumEndpoints 1 > > bInterfaceClass 14 Video > > bInterfaceSubClass 1 Video Control > > bInterfaceProtocol 0 > > iInterface 6 Integrated Webcam > > VideoControl Interface Descriptor: > > bLength 13 > > bDescriptorType 36 > > bDescriptorSubtype 1 (HEADER) > > bcdUVC 1.00 > > wTotalLength 103 > > dwClockFrequency 15.000000MHz > > bInCollection 1 > > baInterfaceNr( 0) 3 > > VideoControl Interface Descriptor: > > bLength 18 > > bDescriptorType 36 > > bDescriptorSubtype 2 (INPUT_TERMINAL) > > bTerminalID 11 > > 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 9 > > bSourceID 11 > > wMaxMultiplier 0 > > bControlSize 2 > > bmControls 0x00000000 > > iProcessing 0 > > bmVideoStandards 0x09 > > None > > SECAM - 625/50 > > VideoControl Interface Descriptor: > > bLength 9 > > bDescriptorType 36 > > bDescriptorSubtype 3 (OUTPUT_TERMINAL) > > bTerminalID 8 > > wTerminalType 0x0101 USB Streaming > > bAssocTerminal 0 > > bSourceID 10 > > iTerminal 0 > > VideoControl Interface Descriptor: > > bLength 25 > > bDescriptorType 36 > > bDescriptorSubtype 6 (EXTENSION_UNIT) > > bUnitID 12 > > guidExtensionCode {45b5da73-23c1-4a3d-a368-610f078c4397} > > bNumControl 0 > > bNrPins 1 > > baSourceID( 0) 9 > > bControlSize 0 > > iExtension 0 > > VideoControl Interface Descriptor: > > bLength 27 > > bDescriptorType 36 > > bDescriptorSubtype 6 (EXTENSION_UNIT) > > bUnitID 10 > > guidExtensionCode {1229a78c-47b4-4094-b0ce-db07386fb938} > > bNumControl 2 > > bNrPins 1 > > baSourceID( 0) 12 > > bControlSize 2 > > bmControls( 0) 0x00 > > bmControls( 1) 0x06 > > iExtension 0 > > Endpoint Descriptor: > > bLength 7 > > bDescriptorType 5 > > bEndpointAddress 0x85 EP 5 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 3 > > 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 87 > > bEndPointAddress 130 > > bmInfo 0 > > bTerminalLink 8 > > bStillCaptureMethod 2 > > bTriggerSupport 1 > > bTriggerUsage 0 > > bControlSize 1 > > bmaControls( 0) 0 > > VideoStreaming Interface Descriptor: > > bLength 27 > > bDescriptorType 36 > > bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED) > > bFormatIndex 1 > > bNumFrameDescriptors 1 > > guidFormat > > {32595559-0000-0010-8000-00aa00389b71} > > 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 340 > > wHeight 374 > > dwMinBitRate 61036800 > > dwMaxBitRate 61036800 > > dwMaxVideoFrameBufferSize 254320 > > dwDefaultFrameInterval 333333 > > bFrameIntervalType 1 > > dwFrameInterval( 0) 333333 > > VideoStreaming Interface Descriptor: > > bLength 10 > > bDescriptorType 36 > > bDescriptorSubtype 3 (STILL_IMAGE_FRAME) > > bEndpointAddress 0 > > bNumImageSizePatterns 1 > > wWidth( 0) 340 > > wHeight( 0) 374 > > bNumCompressionPatterns 0 > > 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 3 > > 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 3 > > 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 3 > > 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 3 > > 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 3 > > 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 3 > > 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 0x13aa 3x 938 bytes > > bInterval 1 > > Interface Descriptor: > > bLength 9 > > bDescriptorType 4 > > bInterfaceNumber 3 > > 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 > > 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) > > > > > > > > thanks, > > > -- Ricardo Ribalda
