[FFmpeg-trac] #4062(undetermined:new): sub2video overlay fails with negative starting timestamp and -copyts

[FFmpeg]

#4062: sub2video overlay fails with negative starting timestamp and -copyts
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             Reporter:  mikaraento   |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  sub          |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by mikaraento):

 Uploaded negative_pts_sub_long.ts to upload.ffmpeg.org/incoming

 There are Finnish subtitles from 03min04s, viewable in VLC or by running
 the 'working' example command with this file (the subtitles are not scaled
 right, I didn't put that in the command for this ticket).

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Ticket URL: <https://trac.ffmpeg.org/ticket/4062#comment:6>
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