[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):

 Is s->global_quality different from VBR number -q:a x?
 ||=LAME equivalent=||=Stereo Bitrate=||=VBR number=||=Recommended
 cutoff=||
 ||  ||16||0.029||4000||
 ||-V9.9||32||0.053||7000||
 ||  ||48||0.097||9000||
 ||-V9||64||0.23||11000||
 ||-V8||80||0.43||13000||
 ||-V7||96||0.55||15000||
 ||-V6||112||0.66||15500||
 ||-V5||128||0.86||16000||
 ||  ||144||1.06||16500||
 ||-V4||160||1.17||17000||
 ||-V3||176||1.29||17500||
 ||-V2||192||1.43||18000||
 ||-V1||224||2.2||19000||
 ||-V0||256||4.3||20000||
 ||  ||288||6.2||20000||
 ||  ||320||7||20000||
 ||  ||352||7.7||20000||
 ||  ||384||10||20000||

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2686#comment:64>
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