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

[FFmpeg]

#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 llogan):

 {{{
 $ ffmpeg -i assertion_diff_shimoseka.m4a -strict experimental -c:a aac -f
 null -
 ffmpeg version N-76947-gec494e6 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 5.2.0 (GCC)
   configuration: --disable-doc
   libavutil      55.  9.100 / 55.  9.100
   libavcodec     57. 16.101 / 57. 16.101
   libavformat    57. 19.100 / 57. 19.100
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6. 17.100 /  6. 17.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'assertion_diff_shimoseka.m4a':
   Metadata:
     major_brand     : M4A
     minor_version   : 512
     compatible_brands: isomiso2
     encoder         : Lavf57.19.100
   Duration: 00:00:50.13, start: 0.000000, bitrate: 129 kb/s
     Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 128 kb/s (default)
     Metadata:
       handler_name    : SoundHandler
 Output #0, null, to 'pipe:':
   Metadata:
     major_brand     : M4A
     minor_version   : 512
     compatible_brands: isomiso2
     encoder         : Lavf57.19.100
     Stream #0:0(und): Audio: aac, 48000 Hz, stereo, fltp, 128 kb/s
 (default)
     Metadata:
       handler_name    : SoundHandler
       encoder         : Lavc57.16.101 aac
 Stream mapping:
   Stream #0:0 -> #0:0 (aac (native) -> aac (native))
 Press [q] to stop, [?] for help
 Assertion diff >= 0 && diff <= 120 failed at libavcodec/aacenc.c:363
 Aborted (core dumped)
 }}}
 Appears to be a regression, but I did not run a bisect. Attached sample
 input file from Zeranoe forum user Zaoshi.

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Ticket URL: <https://trac.ffmpeg.org/ticket/2686#comment:450>
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