[FFmpeg-trac] #7912(undetermined:new): timing is all wrong when extract srt subtitle from video

[FFmpeg]

#7912: timing is all wrong when extract srt subtitle from video
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             Reporter:  jookiyaya    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 ffmpeg -fix_sub_duration -f lavfi -i "movie=test.mkv[out+subcc]" -map 0:1
 test.srt

 also tried

 ffmpeg -fix_sub_duration -real_time 1 -f lavfi -i
 "movie=test.mkv[out+subcc]" -map 0:1 test.srt

 video sample:  https://x0.at/SrG.mkv

 result of test.srt https://x0.at/pUA.srt

 version 4.1.3

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Ticket URL: <https://trac.ffmpeg.org/ticket/7912>
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