[FFmpeg-trac] #9667(avcodec:new): HE-AAC decode samples off by one sample-time

FFmpeg trac at avcodec.org
Thu Feb 24 17:48:06 EET 2022


#9667: HE-AAC decode samples off by one sample-time
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             Reporter:  Nick         |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  minor        |                Component:  avcodec
              Version:  unspecified  |               Resolution:
             Keywords:  he-aac       |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Nick):

 >Just edit the media time in editlist from 5060 to 5058.
 Edit it to be 2529?

 The encoder is adding 5058/48000 samples of lead-in.

 FFmpeg applying the mp4 edit is dropping 10118 samples (5058+5060).

 The resulting WAV file is correctly missing the 5058 samples of lead-in
 but is also missing the first 5060 samples of real audio.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9667#comment:4>
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