[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
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             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            |
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Comment (by Kamedo2):

 The v7 uses less than one third bitrate of v6 in -q:a 0.4 and -q:a 0.7
 when encoding sine waves.
 || ||=v6+c185+c206=||=v7=||
 ||=-q:a 0.4=||79||22||
 ||=-q:a 0.7=||107||32||
 ||=-b:a 64k=||52||55||
 ||=-b:a 128k=||87||105||
 The result of sine_tester.flac in kbps.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2686#comment:220>
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