[FFmpeg-trac] #1538(undetermined:new): request_channels does not work for mpeg program stream

[FFmpeg]

#1538: request_channels does not work for mpeg program stream
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:  git-       |  undetermined
  master                             |               Keywords:  mpegps
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 -request_channels works fine for many tested containers, does not work for
 mpeg program stream
 {{{
 $ ./ffmpeg -i fate-suite/svq3/Vertical400kbit.sorenson3.mov -ac 6 -qscale
 2 -acodec ac3 out.mpg
 }}}
 {{{
 $ ./ffmpeg -request_channels 2 -i out.mpg
 ffmpeg version N-42547-g7543fd8 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Jul 16 2012 07:44:51 with gcc 4.3.2
   configuration: --cc=/usr/local/gcc-4.3.2/bin/gcc --enable-gpl --enable-
 libopenjpeg --enable-libvorbis --enable-libspeex --enable-libmp3lame
 --enable-libtheora --extra-ldflags=-lm --enable-libvpx --enable-libxavs
 --enable-x11grab
   libavutil      51. 65.100 / 51. 65.100
   libavcodec     54. 40.100 / 54. 40.100
   libavformat    54. 16.104 / 54. 16.104
   libavdevice    54.  1.100 / 54.  1.100
   libavfilter     3.  2.100 /  3.  2.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 [mpeg @ 0x904d4a0] max_analyze_duration 5000000 reached at 5000000
 Input #0, mpeg, from 'out.mpg':
   Duration: 00:00:43.57, start: 0.994200, bitrate: 1507 kb/s
     Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p, 320x240 [SAR 1:1 DAR
 4:3], 104857 kb/s, 30 fps, 30 tbr, 90k tbn, 30 tbc
     Stream #0:1[0x80]: Audio: ac3, 44100 Hz, 5.1(side), s16, 448 kb/s
 At least one output file must be specified
 }}}
 I also tested avi, mkv, nut and mpegts and all report stereo / downmixing
 works for all other containers I tested

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1538>
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