[FFmpeg-trac] #2210(undetermined:new): AC3 channel layout change midstream causes severe errors

[FFmpeg]

#2210: AC3 channel layout change midstream causes severe errors
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             Reporter:  agni451      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by agni451):

 I have to use async because I do not re-encode the video and audio
 together (I need to pass the video through Avisynth with QTGMC for
 deinterlacing).  With TV streams, there are sometimes the odd gap in the
 audio stream.  It plays fine as a TS because the timecodes keep it in
 line.  When the video and audio streams are separated, re-encoded
 separately, and then muxed back together (in my case, in an mkv file) any
 gaps in audio disappear and this leads to the audio becoming increasingly
 out of sync with each error.  I need to insert silence for those gaps to
 keep the audio in sync, and async does that for me.  Unfortunately, it
 seems to be confused by the change in audio channel layout and adds far
 more than it should.  Like I said, this generally happens during the
 commercials, but it has occurred during the actual program.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2210#comment:6>
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