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 <harshu...@gmail.com> 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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