[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       |                   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 Kamedo2):

 The bug is most obvious at -b:a 224k. The file is 672,362 Bytes, 267 kbps.
 {{{
 ffmpeg_2.1v8fix -y -i ItCouldBeSweet.wav -vn -c:a aac -strict -2 -b:a 224k
 ItCouldBeSweet_224k.mp4
 }}}
 {{{
 ffmpeg version 2.1.git Copyright (c) 2000-2014 the FFmpeg developers
   built on May  3 2014 15:51:52 with gcc 4.8.1 (GCC)
   configuration: --enable-gpl --enable-version3 --enable-nonfree --extra-
 ldflags=-static --extra-cflags='-march=native -mfpmath=sse' --optflags=-O2
   libavutil      52. 63.101 / 52. 63.101
   libavcodec     55. 52.101 / 55. 52.101
   libavformat    55. 32.101 / 55. 32.101
   libavdevice    55.  9.101 / 55.  9.101
   libavfilter     4.  1.102 /  4.  1.102
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 17.104 /  0. 17.104
   libpostproc    52.  3.100 / 52.  3.100
 Guessed Channel Layout for  Input Stream #0.0 : stereo
 Input #0, wav, from 'ItCouldBeSweet.wav':
   Duration: 00:00:20.02, bitrate: 1411 kb/s
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
 stereo, s16, 1411 kb/s
 Output #0, mp4, to 'ItCouldBeSweet.ffv8f_224k.mp4':
   Metadata:
     encoder         : Lavf55.32.101
     Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo,
 fltp, 224 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (pcm_s16le -> aac)
 Press [q] to stop, [?] for help
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/2686#comment:269>
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