[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):

 Replying to [comment:3 cehoyos]:
 > Does the sample you uploaded contain any subtitles? How can I see them?

 The cut-down version does not contain any subtitles that would be visible.

 {{{
 $ ffprobe -i negative_pts_sub.ts -select_streams s -show_packets
 }}}

 will show you that there are subtitle packets.

 Do you want a larger sample that contains visible subtitles?

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Ticket URL: <https://trac.ffmpeg.org/ticket/4062#comment:4>
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