[FFmpeg-trac] #11018(ffmpeg:new): Bug: Export AAC from video file with specific duration don't give the good duration

[FFmpeg]

#11018: Bug: Export AAC from video file with specific duration don't give the good
duration
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             Reporter:               |                    Owner:  (none)
  Imprevisible                       |
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  ffmpeg
              Version:  unspecified  |               Resolution:
             Keywords:  segment aac  |               Blocked By:
  seek seeking                       |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Imprevisible):

 Replying to [comment:24 MasterQuestionable]:
 > ͏    So "-t 5 -ss $( 0, 5, 10, ... )" alike always result in < 5 s
 duration?
 > ͏    "-c copy" here won't do re-encoding: merely slicing the
 packets/frames independently representable.
 >
 > ͏    You might have to "-map" only the interested audio to make things
 work properly.
 > ͏    (other streams may interfere the slicing)

 I map the right audio in other commands, for the readability here it's not
 shown, but I map the audio, and I even set the number of audio channels. I
 tried to -c copy, same issue, and yes, if I set -t to 5, it's always less
 than 5s for aac, for mp3 its always more, and for flac, ogg and wav, it's
 exactly 5s
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Ticket URL: <https://trac.ffmpeg.org/ticket/11018#comment:25>
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