rtpjitterbuffer not working

[Nicolas Dufresne]

Le mardi 17 mars 2020 à 16:34 -0400, Erik Herz a écrit :
> I have generated a MPEG-TS source with RTP via FFmpeg like so:
> 
> ffmpeg -stream_loop -1 -re -i jamie.mp4 -vcodec mpeg2video -pix_fmt yuv420p -me_method epzs -r 29.97 -g 45 -bf 2 -trellis 2 -cmp 2 -subcmp 2 -s 704x396 -b 2500k -bt 300k -acodec mp2 -ac 2 -ab 192k -ar 44100 -async 1 -y -f rtp_mpegts rtp://239.0.0.1:1234
> 
> and can play it back with this pipeline:
> 
> gst-launch-1.0 udpsrc multicast-group=239.0.0.1 auto-multicast=true port=1234 ! decodebin name=decoder decoder. ! queue ! audioconvert ! audioresample ! osxaudiosink decoder. ! videoconvert ! autovideosink
> 
> when I try to add a jitterbuffer, it has the same state as above but video does not play:

If it plays with the first pipeline, then it's unlikely to be an RTP
MP2T payloaded stream. Only RTP streams can play through jitterbuffer.
Change you ffmpeg command to produce RTP MP2T payloaded stream.

> 
> Eriks-MacBook-Pro:vma erik$ gst-launch-1.0 udpsrc multicast-group=239.0.0.1 auto-multicast=true port=1234 ! rtpjitterbuffer mode=0 latency=100 ! decodebin name=decoder decoder. ! queue ! audioconvert ! audioresample ! osxaudiosink decoder. ! videoconvert ! autovideosink
> Setting pipeline to PAUSED ...
> Pipeline is live and does not need PREROLL ...
> Got context from element 'autovideosink0': gst.gl.GLDisplay=context, gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplayCocoa\)\ gldisplaycocoa0";
> Setting pipeline to PLAYING ...
> New clock: GstSystemClock
> 
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