high bitrate udp buffer drop

[Yang Xiao]

Hi Mr Chou

Did you solve that problem? Thanks.



I play a high rate of mpeg2ts over UDP(10Mbps) with v1.8.2, the video quality

is very poor, a large number of drop frames or macro block.

pipeline(gstplayer):

udpsrc ->tsdemux -> multiqueue -> h264parse -> avdec_aac   .....

->openslessink



-> amcvdec     .....     ->glimagesink



I  tried to  configure with buffer-size properties of

udpsrc,max-size,use_buffering of multiqueue, less than 4M/b  can be normal

playback，10Mbps's video   still a large number of drop frames and after a

few seconds, the video frame stops moving.

-------------------------

01-01 14:04:59.439 21031 22819 W GStreamer+tsdemux: 0:02:40.809052118

0xabe36b50 tsdemux.c:2159:gst_ts_demux_queue_data CONTINUITY: Mismatch

packet 5, stream 13

01-01 14:04:59.518 21031 22819 W GStreamer+tsdemux: 0:02:40.887878160

0xabe36b50 tsdemux.c:2159:gst_ts_demux_queue_data CONTINUITY: Mismatch

packet 3, stream 12

......................

 tsdemux.c:2159:gst_ts_demux_queue_data CONTINUITY: Mismatch packet 11,

stream 14

01-01 14:05:43.714 21031 22819 W GStreamer+tsdemux: 0:03:25.084061098

0xabe36b50 tsdemux.c:2159:gst_ts_demux_queue_data CONTINUITY: Mismatch

packet 12, stream 7

01-01 14:05:43.716 21031 22819 W GStreamer+tsdemux: 0:03:25.086445265

0xabe36b50 tsdemux.c:2159:gst_ts_demux_queue_data CONTINUITY: Mismatch

packet 6, stream 10



-------------------------

If I record the network packets in local file(mpeg2ts) then

gst-plugin-bad/gst-libs/player can perfeclty play it(

Except udpsrc, all other plugins are the same with the  UDP's  pipeline).In

addition,with VLC the stream is played almost perfectly.

So I think the problem comes from some buffering issures.? I think on the

left side of the tsdemux, a plug-in like rtpjittbuffer should be inserted

？Is there a plugin for GStreamer  to deal with UDP's network jitter ？ If not

the case, what other ways can optimize UDP's  pipelie to deal with the

playback of high bit rate files(I can't control the stream server, so it is

not feasible to reduce the bitrate ...)?



Best regards,

Lucky chou


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