[FFmpeg-trac] #9074(undetermined:new): Joining similar MKV and TS results in broken video

[FFmpeg]

#9074: Joining similar MKV and TS results in broken video
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             Reporter:  GrayFace     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 Summary of the bug:
 ffmpeg can't join two excerpts of the same live stream if one of them is
 first converted (-c copy) to MKV format. This happens with any recorded
 *.ts files. I've attached 2 videos as an example, along with concat list
 and run.bat.
 How to reproduce:
 {{{
 % ffmpeg.exe -nostats -safe 0 -f concat -i "List.txt" -c copy "out.mkv"
 ffmpeg version 4.3.1 (from https://www.gyan.dev/ffmpeg/builds/)
 built on 2021-01-01
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/9074>
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