[FFmpeg-trac] #9876(avcodec:new): timestamp is not correct when mux a clip into mkv

[FFmpeg]

#9876: timestamp is not correct when mux a clip into mkv
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             Reporter:  lincutt      |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  nvenc hevc   |               Blocked By:
  mkv                                |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by lincutt):

 Replying to [comment:1 mkver]:
 > Your duration is basically UINT32_MAX when using a 1ms timebase (as the
 Matroska muxer does). The subtitle duration field is a 32 bit integer and
 UINT32_MAX actually means "unknown"; PGS subtitles typically have an
 unknown duration (they are cancelled/overwritten by a later packet). So it
 seems that some part of the code does not treat this special value
 correctly.
 >
 > Maybe using the -fix_sub_duration (as an input option) would help; I am
 not sure.

 Thanks for your suggestion, it's worked!
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Ticket URL: <https://trac.ffmpeg.org/ticket/9876#comment:2>
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