[FFmpeg-trac] #6165(avformat:new): FFMPEG UDP stream broken with DVB_SUBTITLE's

[FFmpeg]

#6165: FFMPEG UDP stream broken with DVB_SUBTITLE's
-------------------------------------+-------------------------------------
             Reporter:  NPeca        |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  mpegts       |               Blocked By:
  dvbsub                             |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by slasktrat):

 I experience the exact same issue. What I try to do is downscale the video
 track of a multicast transport stream and re-stream it with all other
 elementary streams untouched. And all is good as long as there is no
 dvbsub tracks involved.

 I've uploaded a sample file and the issue can be reproduced using this
 command:

 {{{
 ffmpeg -re -i dvbsub_udp_issue_6165.ts -map 0 -c copy -f mpegts
 udp://@239.1.1.1:1234
 }}}

 Playback is choppy and seem to struggle every time a subtitle "times
 out"/should disappear

 If I exclude the subtitle track, playback is fine without issues

 {{{
 ffmpeg -re -i dvbsub_udp_issue_6165.ts -map 0 -map -0:s -c copy -f mpegts
 udp://@239.1.1.1:1234
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/6165#comment:3>
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