[FFmpeg-trac] #8366(avformat:new): Audio ticks and video/audio out-of-sync when using MXF files with pre-charge

FFmpeg trac at avcodec.org
Thu Nov 21 21:32:45 EET 2019


#8366: Audio ticks and video/audio out-of-sync when using MXF files with pre-
charge
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             Reporter:  HenkDemper  |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  MXF         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by Tjoppen):

 Replying to [comment:15 HenkDemper]:
 > @Tjoppen and @cehoyos
 >
 > Do I understand correct from your replies that -given that by no means I
 have knowledge of the internals of ffplay/fftools etc- to solve this issue
 is not going to be 'an easy one' and I should adjust my expectations for
 any quick fix (if ever) accordingly ?

 I don't really know enough to say, but based on Carl's comment I'd say it
 would at least require a bunch of flags in addition to the potential sync
 issues I mentioned.

 This also ties into dealing with gapless stuff, where we'd have to cut off
 the end of an audio stream in certain cases, and possibly also carrying
 over the "actual duration" metadata.

 This means we have three classes of containers that need to deal with
 this:

 * MXF
 * MOV
 * anything that supports gapless playback of codecs like MP3

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8366#comment:16>
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