Forgot to mention the camera on which i am trying the below
i am trying with Logitech B990
Regards,
Harshitha
On Tue, Oct 25, 2011 at 12:00 PM, Harshitha H.S wrote:
> Hello,
>
> I had few queries regarding the UVC support for H264 video stream. Please
> help me in resolving this. (I am just getting started with linux. Not much
> experienced in it. So please bear with my basic questions )
>
> 1: I understand that for the raw video formats, i can use the V4L2 APIs to
> get the things done for me. For MJPG i can use V4L2_PIX_FMT_MJPEG. But from
> the V4L2 API specification document, i could not find any APIs provided for
> H264 video streaming from the camera.
> -> Am i missing something ? Is there an V4L2 API available to get the
> H264 streaming from my camera(Ofcourse my camera is H264 capabe) ? Is this
> support vendor specific or generic ? Or Is H264 support is not very matured
> at UVC/V4L2 ?
>
> 2: When i was going through the USB_Video_Payload_H264_1.0.pdf, i came
> across UVCX_VIDEO_CONFIG_PROBE/
> UVCX_VIDEO_CONFIG_COMMIT APIs. I am using *kernel 2.6.31*.
>-> Are these generic APIs? Is there any generic patch i can apply to my
> uvc, if any, to call these APIs at my application to achieve H264 video
> streaming ?
>-> For me to call this APIs from my application, should i have to take
> care of any dependencies (codec specifics) ? Like what device type to be
> open (/dev/video) to read the video stream from the camera ? Is there any
> sample H264 video capture which can help me in this ?
>-> Can i use V4L2 and UVCX both together ?
>
> Awaiting for the response!. Thanks in advance!
>
> ( Note: Sometime back regarding one of my H264 questions to the UVC group.
> I did receive an reply from Ajay Bhargav directing me to a mail thread of
> H264 discussion and some patches on V4L2 for achieving the H264. But i
> didnot find those files for which the patches were available in my kernel
> version. :-(. I do have the UVC code but not sys/v4l2. And i do not want to
> upgrade my kernel version )
>
> Thanks,
> Harshitha HS
>
>
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