[FFmpeg-trac] #2400(undetermined:open): A/V desync for separate video and aac in mp4 input files

FFmpeg trac at avcodec.org
Sat Feb 18 17:09:22 EET 2017


#2400: A/V desync for separate video and aac in mp4 input files
-------------------------------------+-------------------------------------
             Reporter:  chinshou     |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:
              Version:  git-master   |  undetermined
             Keywords:  mov aac      |               Resolution:
  regression desync                  |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by michael):

 The STTS atom of bbb.mp4 looks broken
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x2fbeb40] track[0].stts.entries = 3
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x2fbeb40] sample_count=4, sample_duration=1024
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x2fbeb40] sample_count=360, sample_duration=1
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x2fbeb40] sample_count=1, sample_duration=1024

 This results in bad timestamps for the audio

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Ticket URL: <https://trac.ffmpeg.org/ticket/2400#comment:7>
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