[FFmpeg-trac] #4830(avcodec:open): request channel layout does not work with some DTS streams

[FFmpeg]

#4830: request channel layout does not work with some DTS streams
-------------------------------------+-------------------------------------
             Reporter:  michael      |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  dca          |               Blocked By:
  regression                         |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by cehoyos):

 {{{
 $ ffmpeg -request_channel_layout 3 -i
 vc1_dts_mplayerAudioProblem_sb41_cut.m2ts out.wav
 ffmpeg version N-74956-g8d860f9 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.3 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55.  0.100 / 55.  0.100
   libavcodec     57.  0.100 / 57.  0.100
   libavformat    57.  0.100 / 57.  0.100
   libavdevice    57.  0.100 / 57.  0.100
   libavfilter     6.  0.100 /  6.  0.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.100 /  2.  0.100
   libpostproc    54.  0.100 / 54.  0.100
 [mpegts @ 0x9612280] Failed to open codec in av_find_stream_info
 [mpegts @ 0x9612280] PES packet size mismatch
     Last message repeated 1 times
 Input #0, mpegts, from 'vc1_dts_mplayerAudioProblem_sb41_cut.m2ts':
   Duration: 00:00:00.54, start: 867.477311, bitrate: 15521 kb/s
   Program 1
     Stream #0:0[0x1011]: Video: vc1 (Advanced) (VC-1 / 0x312D4356),
 yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn,
 47.95 tbc
     Stream #0:1[0x1100](deu): Audio: dts (DTS-HD HRA) ([134][0][0][0] /
 0x0086), 48000 Hz, 7.1, fltp
 [dca @ 0x961a180] Channel layout '7.1' with 8 channels does not match
 specified number of channels 2: ignoring specified channel layout
 Output #0, wav, to 'out.wav':
   Metadata:
     ISFT            : Lavf57.0.100
     Stream #0:0(deu): Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz,
 7.1, s16, 6144 kb/s
     Metadata:
       encoder         : Lavc57.0.100 pcm_s16le
 Stream mapping:
   Stream #0:1 -> #0:0 (dts (dca) -> pcm_s16le (native))
 Press [q] to stop, [?] for help
 [dca @ 0x961a180] Number of channels changed in DCA decoder (2 -> 8)
 [mpegts @ 0x9612280] PES packet size mismatch
 [dca @ 0x961a180] Didn't get subframe DSYNC
 [dca @ 0x961a180] Error decoding DTS-XXCH extension
     Last message repeated 1 times
 size=     360kB time=00:00:00.48 bitrate=6145.7kbits/s
 video:0kB audio:360kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.027669%
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/4830#comment:3>
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