[FFmpeg-trac] #566(undetermined:new): Encoding AAC stereo audio which starts silently to mpeg-ts causes 0-channel audio output.

[FFmpeg]

#566: Encoding AAC stereo audio which starts silently to mpeg-ts causes 0-channel
audio output.
-------------------------------------+-------------------------------------
             Reporter:  tungj        |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by tungj):

 Replying to [comment:3 cehoyos]:
 > Replying to [comment:2 tungj]:
 > > It still gives 0 channels using the native aac encoder
 >
 > Only reproducible with -ar 22050, is that correct?

 It seems to be reproducible with anything below a certain rate, in this
 case, around 37000.

 {{{
 for rate in 22050 33050 35000 36000 37000 44050; do ffmpeg -y -i
 'initialSilence.mp4' -f mpegts -t 10 -acodec libfaac -ab 40k -ar $rate
 initialSilence.ts 2>/dev/null 1>&2; echo $rate; ffprobe initialSilence.ts
 2>&1 | grep Audio; done;
 22050
     Stream #0:1[0x101](und): Audio: aac ([15][0][0][0] / 0x000F), 0
 channels, s16
 33050
     Stream #0:1[0x101](und): Audio: aac ([15][0][0][0] / 0x000F), 0
 channels, s16
 35000
     Stream #0:1[0x101](und): Audio: aac ([15][0][0][0] / 0x000F), 0
 channels, s16
 36000
     Stream #0:1[0x101](und): Audio: aac ([15][0][0][0] / 0x000F), 0
 channels, s16
 37000
     Stream #0:1[0x101](und): Audio: aac ([15][0][0][0] / 0x000F), 32000
 Hz, stereo, s16, 4 kb/s
 44050
     Stream #0:1[0x101](und): Audio: aac ([15][0][0][0] / 0x000F), 44100
 Hz, stereo, s16, 5 kb/s

 }}}

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/566#comment:4>
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