[FFmpeg-trac] #4145(undetermined:new): when rebroadcasting/streaming to flv format with aac_adtstoasc bitstream filter, sound gets removed

[FFmpeg]

#4145: when rebroadcasting/streaming to flv format with aac_adtstoasc bitstream
filter, sound gets removed
-------------------------------------+-------------------------------------
             Reporter:  PyroDevil    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by PyroDevil):

 I also tried it without twitch in between, but the problem doesn't occur:

 {{{
 % livestreamer -O www.twitch.tv/otherstream worst 2>/dev/null | ffmpeg -i
 - -c copy -bsf:a aac_adtstoasc -f flv pipe:1 2>/dev/null | ffmpeg -i - 2>
 pipetest.log
 ffmpeg version N-68130-gb50e003 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Dec  1 2014 14:44:49 with gcc 4.9.2 (GCC)
   configuration: --prefix=/usr --disable-static --enable-gpl --enable-
 libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame
 --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx
 --enable-libx264 --enable-libx265 --enable-nonfree --enable-shared
 --enable-x11grab
   libavutil      54. 15.100 / 54. 15.100
   libavcodec     56. 13.100 / 56. 13.100
   libavformat    56. 15.101 / 56. 15.101
   libavdevice    56.  3.100 / 56.  3.100
   libavfilter     5.  2.103 /  5.  2.103
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  3.100 / 53.  3.100
 Input #0, flv, from 'pipe:':
   Metadata:
     encoder         : Lavf56.15.101
   Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: h264 (Constrained Baseline), yuv420p, 400x226, 20
 fps, 20 tbr, 1k tbn, 2k tbc
     Stream #0:1: Audio: aac, 44100 Hz, stereo, fltp, 127 kb/s
 At least one output file must be specified
 }}}

 So could it be the rtmp protocol?

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4145#comment:6>
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