[FFmpeg-trac] #2706(avcodec:new): Native AAC encoder produces warbling with pure aevalsrc sine wave

FFmpeg trac at avcodec.org
Tue Oct 13 20:26:52 CEST 2015


#2706: Native AAC encoder produces warbling with pure aevalsrc sine wave
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             Reporter:  MarkZV      |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  aac         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by Kamedo2):

 Replying to [comment:9 cehoyos]:
 > IS this still reproducible with current FFmpeg git head?

 No, not on sine440Hz_24bit.flac and sine_tester.flac (See #2686 Sine waves
 for a warbling test. 50 440 1000 3000 7000 10000 20000Hz. 24bit 48kHz PCM.
 ), {{{-q:a 1}}}, {{{-q:a 2}}}, {{{-b:a 128k}}} and {{{-b:a 320k}}}, on
 default on N-75950-ge652f69. The warble remains in perceptually acceptable
 range.

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Ticket URL: <https://trac.ffmpeg.org/ticket/2706#comment:10>
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