[FFmpeg-trac] #2854(undetermined:new): support msn audio

FFmpeg trac at avcodec.org
Mon Aug 12 20:24:08 CEST 2013


#2854: support msn audio
-------------------------------------+-------------------------------------
               Reporter:  ami_stuff  |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 it looks like it's just a gsm_ms

 http://samples.mplayerhq.hu/A-codecs/MSN/msnaudio.asf

 here are more samples:

 http://www1.datafilehost.com/d/67f602fc

 44khz_mono_71663_baund.avi
 22khz_mono_35832_baund.avi
 11khz_mono_17916_baund.avi
 8khz_mono_13000_baund.avi

 decodes ok, the rest of the modes needs some tweaks in the decoder

 {{{
 C:\>ffmpeg -i msnaudio.asf
 ffmpeg version N-55393-g3b2e99f Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Aug  8 2013 21:32:57 with gcc 4.7.3 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-av
 isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
 --enab
 le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-
 libfreetyp
 e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
 --ena
 ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-l
 ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
 --enable-libsp
 eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-
 libvo-
 amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-
 libxavs --
 enable-libxvid --enable-zlib
   libavutil      52. 41.100 / 52. 41.100
   libavcodec     55. 24.100 / 55. 24.100
   libavformat    55. 13.102 / 55. 13.102
   libavdevice    55.  3.100 / 55.  3.100
   libavfilter     3. 82.100 /  3. 82.100
   libswscale      2.  4.100 /  2.  4.100
   libswresample   0. 17.103 /  0. 17.103
   libpostproc    52.  3.100 / 52.  3.100
 [asf @ 029d78a0] Estimating duration from bitrate, this may be inaccurate
 [asf @ 029d78a0] Could not find codec parameters for stream 0 (Audio: none
 (2[0]
 [0][0] / 0x0032), 22050 Hz, 1 channels, 35 kb/s): unknown codec
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 Guessed Channel Layout for  Input Stream #0.0 : mono
 Input #0, asf, from 'msnaudio.asf':
   Metadata:
     title           : Scorpion Segment 3
     copyright       : Paramount Pictures
   Duration: 00:05:44.38, start: 0.000000, bitrate: 35 kb/s
     Stream #0:0: Audio: none (2[0][0][0] / 0x0032), 22050 Hz, mono, 35
 kb/s
     Stream #0:1: Video: msmpeg4v2 (MP42 / 0x3234504D), yuv420p, 320x240,
 36.17 t
 br, 1k tbn, 1k tbc
 At least one output file must be specified
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2854>
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