[FFmpeg-trac] #11337(avfilter:new): "asegment" with relative timestamps created segments of wrong duration

[FFmpeg]

#11337: "asegment" with relative timestamps created segments of wrong duration
------------------------------------+------------------------------------
             Reporter:  pablo       |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:  asegment    |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  1           |
------------------------------------+------------------------------------
Changes (by Leo Izen):

 * reproduced:  0 => 1
 * version:  5.1.4 => git-master

Comment:

 I can reproduce this. The issue here appears that the second `+1` is
 relative to the first absolute timestamp. This means something like
 `'sine=d=10,asegment=1|+1|+1` is creating the last segment as having the
 same offset as the second-to-last segment, so the second-to-last segment
 has zero duration. Which any encoder fails to encode (you can try with `-f
 null -`, for example).

 Try something like this:

 `ffmpeg -v verbose -lavfi
 'sine=d=10,asegment=timestamps=1|+1|+4[a0][a1][a2][a3]' -map '[a0]' -map
 '[a1]' -map '[a2]' -map '[a3]' -f null -`

 The last segment should start 6 seconds after the initial one, but it
 actually starts 5 seconds after the initial one.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11337#comment:2>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker