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Gstreamer, playing udp streams on DM6446

Ozgür Ozan
Prodigy 10 points


Hi, I'm trying to play some network streams using gstreamer on DM6446 evm. We have a streamer that streams channels over udp,in mpeg-2 TS format. I tried a lot of pipeline examples but it didn't work properly. But at last I succeded  to play a stream on my host pc with this pipeline :

gst-launch-0.10 -v udpsrc multicast-group=224.246.0.31 auto-multicast=true port=1234 ! mpegtsdemux ! ffdec_h264 ! xvimagesink sync=false 


It has played but it was laggy and jittering ( I don't know the right terms but it wasn't the best, I'm sure of it.) Then I tried this simple pattern above with TI-plugin elements on my board  : 

gst-launch-0.10 -v udpsrc multicast-group=224.246.0.50 auto-multicast=true port=1234 ! mpegtsdemux ! TIViddec2 codecName=h264dec engineName=decode ! TIDmaiVideoSink videoStd=D1_PAL videoOutput=composite sync=false

and the output is :

/*output*/
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: MpegTSClock
/GstPipeline:pipeline0/GstMpegTSDemux:mpegtsdemux0: pat-info = ((GValueArray*) )
/GstPipeline:pipeline0/GstMpegTSDemux:mpegtsdemux0: pmt-info = ((MpegTsPmtInfo*)
/GstPipeline:pipeline0/GstTIViddec2:tividdec20.GstPad:sink: caps = video/x-h264

and there was nothing on the screen. Now I want to know:
  • which elements should I include to this pipeline for a proper video stream-playing.
  • I didn't use any audio element, which element should I include after mpegtsdemux for decoding aac codec ? 
  • Do I have to generate a cap from server, to make streams played on client? I didn't know whether our streamer uses gstreamer or not, how can I generate this video cap without any gstreamer using server ?