[FFmpeg-trac] #2686(avcodec:open): Native AAC encoder collapses at high bitrates on some samples

FFmpeg trac at avcodec.org
Sun Sep 6 17:30:41 CEST 2015


#2686: Native AAC encoder collapses at high bitrates on some samples
-------------------------------------+-------------------------------------
             Reporter:  Kamedo2      |                    Owner:
                 Type:  defect       |  klaussfreire
             Priority:  normal       |                   Status:  open
              Version:  git-master   |                Component:  avcodec
             Keywords:  aac          |               Resolution:
  regression                         |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by Kamedo2):

 This sound will crash the FFmpeg, when the sampling rate is 96kHz.
 {{{
 ffmpeg74961-g61009a7 -y -i ffmpeg_96k_error.flac -c:a aac -strict
 experimental -b:a 96k -ac 2 -ar 96000 out.mp4
 ffmpeg74961-g61009a7 -y -i ffmpeg_96k_error.flac -c:a aac -strict
 experimental -b:a 160k -ac 2 -ar 96000 out.mp4
 ffmpeg74961-g61009a7 -y -i ffmpeg_96k_error.flac -c:a aac -strict
 experimental -q:a 1 -ac 2 -ar 96000 out.mp4
 }}}
 I tried many sine sweeps but it seems that the bug only happens when one
 of channel is inverted.

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Ticket URL: <https://trac.ffmpeg.org/ticket/2686#comment:404>
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