Streaming Live H264 Video Over RTP

[William Metcalf]

Thank you for your suggestion.  With "do-timestamp" set to false, the 
video plays at a low resolution no matter what I set the encoding 
quality to.  However, with "do-timestamp" set to true, I see a 
noticeable change in video quality when I change the encoding quality.  
However, I am still not able to get the video to render correctly with 
"do-timestamp" set equal to true.

- William

On 8/4/2011 10:10 AM, Mailing List SVR wrote:
> Il 04/08/2011 16:54, William Metcalf ha scritto:
>> I am streaming live H264 video from an application in Windows (the 
>> input is from a capture card) as follows
>>
>> appsrc is-live=true do-timestamp=false typefind=true ! 
>> "video/x-raw-yuv,format=(fourcc)UYVY,width=(int)720,height=(int)486,framerate=(fraction)30/1" 
>> ! ffmpegcolorspace ! x264enc byte-stream=true ! h264parse ! 
>> rtph264pay ! udpsink clients="192.168.42.45:52000"
>>
>
> try to set the encoding quality on the x264enc element
>
>> In order to receive the stream I use the following pipeline
>>
>> gst-launch -v udpsrc port=52000 ! 
>> "application/x-rtp,media=(string)video,clock-rate=90000,encoding-type=(string)H264,payload=(int)96" 
>> ! rtph264depay ! 
>> "video/x-h264,width=(int)720,height=(int)486,framerate=(fraction)30/1" ! 
>> ffdec_h264 ! ffmpegcolorspace ! glimagesink sync=false
>>
>> The video produced plays fine (i.e. the framerate and all of the 
>> colors seem correct), but the video is of very very low quality and 
>> is very pixelated.  If I change the "do-timestamp" property of appsrc 
>> to true, the video becomes very clear and very high quality, but the 
>> video plays very jumpy and I get the following errors repeatedly:
>>
>> 0:00:04.949494000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> Missing reference picture
>> 0:00:04.956495000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> decode_slice_header error
>> 0:00:05.045504000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> reference picture missing during reorder
>> 0:00:05.059505000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> reference picture missing during reorder
>> 0:00:05.073507000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> reference picture missing during reorder
>> 0:00:05.087508000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> reference picture missing during reorder
>> 0:00:05.104510000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> Missing reference picture
>> 0:00:05.119511000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> decode_slice_header error
>> 0:00:05.148514000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> mmco: unref short failure
>> 0:00:05.168516000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> mmco: unref short failure
>> 0:00:05.183518000  2680   0185E490 ERROR                 ffmpeg .:0:: 
>> Missing reference picture
>>
>> I am sure these errors are because of some setting that I am missing 
>> or setting to a wrong value, but so far I have not been able to find 
>> a good solution.  Can anyone offer some insight on how to fix this 
>> problem?  Any help is greatly appreciated.
>>
>> Thank you,
>> William
>>
>>
>> _______________________________________________
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>> gstreamer-devel at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
>
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