[FFmpeg-trac] #6251(undetermined:new): copyts fails badly for negative start time

[FFmpeg]

#6251: copyts fails badly for negative start time
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             Reporter:  cehoyos      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  mpegts dts   |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by cehoyos):

 Replying to [comment:1 ferrys]:
 > it is necessary to use -copyts for preserving audio video sync by
 transcoding udp multiast streams for example... if you not use this
 parameter you can expect bad sync in audio video - small problem in audio
 track is enough... ffmpeg is then not able to hold sync... in case of
 clean input stream, everything is ok and you can not use this... :)

 Please post all usage questions - with command line and complete, uncut
 console output - on the user mailing list.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6251#comment:2>
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