[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):

 Replying to [comment:203 klaussfreire]:
 > However, it seems the tendency to spend lots of bits on speech stems
 from psy itself, not anything else. It seems to estimate speech has a lot
 of perceptual entropy. It may be true, but there is some inefficiency
 that's hard to fix without deviating from the standards.

 Allocating less bits on short frame may help. It should increase the
 quality, although a strong tonality estimator is ideal.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2686#comment:205>
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