[FFmpeg-trac] #5162(avcodec:open): aac encoder adds extra frame(s)

FFmpeg trac at avcodec.org
Sun Jan 17 20:16:49 CET 2016

#5162: aac encoder adds extra frame(s)
             Reporter:  slhck        |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  aac          |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |

Comment (by slhck):

 Replying to [comment:2 heleppkes]:
 > This is normal and expected behavior of any AAC encoder. It produces
 "preroll" data that the decoder is supposed to skip.

 How does the decoder know it's pre-roll data? Like I mentioned, if you re-
 encode the file multiple times it's not skipped, but added up.

Ticket URL: <https://trac.ffmpeg.org/ticket/5162#comment:3>
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