On 06/10/10 12:26, Natalia Portillo wrote:
> Hi David,
>
>> Attempting to try out your patches, but it's failing with the following:
>>
>> usb-uvc: Init called
>> usb-uvc: Trying to open /dev/video0
>> .usb-uvc: Device opened correctly.
>> usb-uvc: Querying capabilities.
>> usb-uvc: Device driver: uvcvideo
>> usb-uvc: Device name: Laptop_Integrated_Webcam_0.3M
>> usb-uvc: Device bus: usb-0000:00:1a.7-6
>> usb-uvc: Driver version: 0.1.0
>> usb-uvc: Device capabilities: 0x04000001
>> usb-uvc: Enumerating video inputs.
>> usb-uvc: Setting video input to index 0
>> usb-uvc: Video input correctly set.
>> usb-uvc: Trying to set 320x240 MJPEG.
>> qemu-system-x86_64: -device usb-uvc-webcam,device=/dev/video0: Invalid
>> format.
>
> As for now only cameras that allow MJPEG format will work.
> Check your camera specifications (lsusb -v works if your real camera is UVC,
> check driver's source otherwise).
> Cameras with RAW frames (YUYV and NV12 formats) do not work, yet. I'm on it.
Trying to guess the relevant descriptors:
VideoStreaming Interface Descriptor:
bLength 50
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 3
bmCapabilities 0x00
Still image unsupported
wWidth 320
wHeight 240
dwMinBitRate 768000
dwMaxBitRate 4608000
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 6
bDescriptorType 36
bDescriptorSubtype 13 (COLORFORMAT)
bColorPrimaries 1 (BT.709,sRGB)
bTransferCharacteristics 1 (BT.709)
bMatrixCoefficients 4 (SMPTE 170M (BT.601))
>
>>
>> Also, I tried a PWC camera which is not a V4L2_INPUT_TYPE_CAMERA and
>> noticed that video_input_index is used uninitialized in usb_uvc_initfn
> It's a webcam?
> Could you give me more information?
> Manufacturer, model, linux's module name.
usb 7-1: new full speed USB device using uhci_hcd and address 3
usb 7-1: New USB device found, idVendor=046d, idProduct=08b6
usb 7-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
pwc: Logitech/Cisco VT Camera webcam detected.
David
>
> All webcams SHOULD (and MUST) implement V4L2_INPUT_TYPE_CAMERA.
> Not the same for video cameras or capture devices (PAL/NTSC, DVB/ATSC).
>
> Regards,
> Natalia Portillo
