[FFmpeg-trac] #2325(undetermined:new): MP4 AAC Audio is delayed by 2ms when converted to PCM

FFmpeg trac at avcodec.org
Tue Mar 5 23:40:32 CET 2013

#2325: MP4 AAC Audio is delayed by 2ms when converted to PCM
             Reporter:  brchapman    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:
              Version:  git-master   |  undetermined
             Keywords:  aac mov      |               Resolution:
  regression                         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
Changes (by cehoyos):

 * keywords:  aac mov => aac mov regression
 * priority:  normal => important


 If there is an issue, it is a regression since 1edea05

 Could you explain how you know that the delay is a bug? What is the other
 application you are testing?
 Do you see the same problem if you extract the audio stream from the mov
 file with "ffmpeg -i test100.mp4 -acodec copy out.aac" ? Ie, is the
 problem in any way related to the container or only to aac? I see the same
 delay when decoding the extracted aac file with FFmpeg, but does your
 reference application also decode the extracted aac file without this

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2325#comment:4>
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