[FFmpeg-trac] #5935(undetermined:new): Duration glitch and seek offset problems with transcodes to h264/aac/mp4

[FFmpeg]

#5935: Duration glitch and seek offset problems with transcodes to h264/aac/mp4
-------------------------------------+-------------------------------------
             Reporter:  NeilSlater-  |                    Owner:
  Excession                          |                   Status:  new
                 Type:  defect       |                Component:
             Priority:  normal       |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:  duration     |               Blocked By:
  timing                             |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by NeilSlater-Excession):

 Update: I added a few more transcodes to the demo project. In addition I
 noted that when transcoding from "broken" ffmpeg version (1 frame out and
 wrong duration) using ffmbc to re-transcode, then the resulting file has
 correct duration and plays perfectly.

 If I try to do something like:

 {{{
 ffmbc -y -i encoded_by_ffmpeg.mp4 -f mp4 -vcodec copy -acodec copy
 test.mp4
 }}}

 Then ffmbc returns an error:

 {{{
 [mp4 @ 0x7ffbc300a200] Application provided invalid, non monotonically
 increasing dts to muxer in stream 1: 25600 >= 25600
 av_interleaved_write_frame(): Invalid argument
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/5935#comment:2>
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