[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 klaussfreire):

 It seems that ANMR just needs a larger search space. Expanding
 TRELLIST_STATES to 121, and fixing path construction to respect
 SCALE_MAX_DIFF of course, though it doubles the time taken (ouch), it does
 improve the quality considerably. I think it's now just a matter of coding
 the same tonal priorizations and making sure it works well with VBR, and
 ANMR is probably good as done.

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Ticket URL: <https://trac.ffmpeg.org/ticket/2686#comment:298>
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