[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):

 comment:185 was tested, along with qaac(Apple AAC). Apple AAC is a very
 good encoder, so the bitrate it uses must be close to the optimal.
 [[Image(http://i40.tinypic.com/2cok3rn.png)]]
 -q:a 0.3 vs -q:a 0.7 vs -q:a 0.7 vs -vbr 3 vs --tvbr 63 vs -V5
 Std.bitrate is 127.5, 127.0, 126.9, 126.9, 126.2, 129.9, all of them are
 very close to 128k.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2686#comment:190>
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