[FFmpeg-trac] #5512(undetermined:closed): Audio Out of Sync after transcode

FFmpeg trac at avcodec.org
Tue Apr 13 21:42:52 EEST 2021


#5512: Audio Out of Sync after transcode
-------------------------------------+-------------------------------------
             Reporter:  ronag        |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:  invalid
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by enevills):

 * status:  new => closed
 * resolution:   => invalid


Comment:

 I know this is old, and solved a bit ago.

 This isn't an FFmpeg issue. I found out applications using Apple's
 deprecated QTKit assume 2112 priming samples. rather than reading the
 header. Most modern encoders seem to use 1024 samples. More info here:
 [https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/QTFFAppenG/QTFFAppenG.html]

 I think QTKit has lots of 32-bit code in it so it's finally getting phased
 out and becoming a non-issue.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5512#comment:25>
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