[FFmpeg-trac] #4676(undetermined:new): Concat of AAC + MP4 has gaps

[FFmpeg]

#4676: Concat of AAC + MP4 has gaps
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             Reporter:  ronag        |                    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 ronag):

 Same problem with both 'aac' and 'libmp3lame'. Also tried with:

 ffmpeg -f concat -i list.txt -c copy -f nut - | ffplay -i -

 With 'opus' there is no gap but there is audible distortion at the 2
 second mark.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4676#comment:4>
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