[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 Kamedo2):

 Now the faad decode and the low bitrate encodes above are properly working
 on x86.
 But this will fail.
 {{{
 ffmpeg77827 -y -i short_block_test_2.flac -c:a aac -b:a 8k -cutoff 15000
 -ar 48000 out.mp4
 ffmpeg version N-77827-g9006567 Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 5.2.0 (GCC)
   configuration:
   libavutil      55. 13.100 / 55. 13.100
   libavcodec     57. 22.100 / 57. 22.100
   libavformat    57. 21.101 / 57. 21.101
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6. 23.100 /  6. 23.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
 Input #0, flac, from 'short_block_test_2.flac':
   Duration: 00:00:15.00, start: 0.000000, bitrate: 91 kb/s
     Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
 Output #0, mp4, to 'out.mp4':
   Metadata:
     encoder         : Lavf57.21.101
     Stream #0:0: Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz,
 stereo, flt
 p (16 bit), 8 kb/s
     Metadata:
       encoder         : Lavc57.22.100 aac
 Stream mapping:
   Stream #0:0 -> #0:0 (flac (native) -> aac (native))
 Press [q] to stop, [?] for help
 Assertion diff >= 0 && diff <= 120 failed at libavcodec/aacenc.c:363

 This application has requested the Runtime to terminate it in an unusual
 way.
 Please contact the application's support team for more information.
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/2686#comment:487>
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