[FFmpeg-trac] #2163(FFmpeg:new): Option channel_layout does not work anymore

[FFmpeg]

#2163: Option channel_layout does not work anymore
--------------------------------------+------------------------------------
               Reporter:  cehoyos     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  important   |              Component:  FFmpeg
                Version:  git-master  |               Keywords:  regression
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+------------------------------------
 -channel_layout is broken since af4b1c0 / 77bd1bc
 The following two command lines produce identical output files:
 {{{
 $ ffmpeg -channel_layout 2.1 -ac 3 -f u8 -i /dev/zero -t 1 out21.wav
 ffmpeg version N-49070-g098d389 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Jan 21 2013 12:27:07 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack
   libavutil      52. 15.100 / 52. 15.100
   libavcodec     54. 90.100 / 54. 90.100
   libavformat    54. 61.101 / 54. 61.101
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 32.101 /  3. 32.101
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 [u8 @ 0x28be220] max_analyze_duration 5000000 reached at 5015510
 microseconds
 [u8 @ 0x28be220] Estimating duration from bitrate, this may be inaccurate
 Guessed Channel Layout for  Input Stream #0.0 : 2.1
 Input #0, u8, from '/dev/zero':
   Duration: N/A, bitrate: 1058 kb/s
     Stream #0:0: Audio: pcm_u8, 44100 Hz, 2.1, u8, 1058 kb/s
 Output #0, wav, to 'out21.wav':
   Metadata:
     ISFT            : Lavf54.61.101
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2.1,
 s16, 2116 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (pcm_u8 -> pcm_s16le)
 Press [q] to stop, [?] for help
 size=     264kB time=00:00:01.02 bitrate=2117.6kbits/s
 video:0kB audio:264kB subtitle:0 global headers:0kB muxing overhead
 0.037731%
 }}}
 {{{
 $ ffmpeg -channel_layout 3.0 -ac 3 -f u8 -i /dev/zero -t 1 out30.wav
 ffmpeg version N-49070-g098d389 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Jan 21 2013 12:27:07 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack
   libavutil      52. 15.100 / 52. 15.100
   libavcodec     54. 90.100 / 54. 90.100
   libavformat    54. 61.101 / 54. 61.101
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 32.101 /  3. 32.101
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 [u8 @ 0x26c5220] max_analyze_duration 5000000 reached at 5015510
 microseconds
 [u8 @ 0x26c5220] Estimating duration from bitrate, this may be inaccurate
 Guessed Channel Layout for  Input Stream #0.0 : 2.1
 Input #0, u8, from '/dev/zero':
   Duration: N/A, bitrate: 1058 kb/s
     Stream #0:0: Audio: pcm_u8, 44100 Hz, 2.1, u8, 1058 kb/s
 Output #0, wav, to 'out30.wav':
   Metadata:
     ISFT            : Lavf54.61.101
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2.1,
 s16, 2116 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (pcm_u8 -> pcm_s16le)
 Press [q] to stop, [?] for help
 size=     264kB time=00:00:01.02 bitrate=2117.6kbits/s
 video:0kB audio:264kB subtitle:0 global headers:0kB muxing overhead
 0.037731%
 }}}
 {{{
 $ ffmpeg -i out21.wav -i out30.wav
 ffmpeg version N-49070-g098d389 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Jan 21 2013 12:27:07 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack
   libavutil      52. 15.100 / 52. 15.100
   libavcodec     54. 90.100 / 54. 90.100
   libavformat    54. 61.101 / 54. 61.101
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 32.101 /  3. 32.101
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, wav, from 'out21.wav':
   Metadata:
     encoder         : Lavf54.61.101
   Duration: 00:00:01.02, bitrate: 2117 kb/s
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2.1,
 s16, 2116 kb/s
 Input #1, wav, from 'out30.wav':
   Metadata:
     encoder         : Lavf54.61.101
   Duration: 00:00:01.02, bitrate: 2117 kb/s
     Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2.1,
 s16, 2116 kb/s
 At least one output file must be specified
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2163>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker