[FFmpeg-trac] #1579(undetermined:new): fix remuxing of imaadpcm in wav

[FFmpeg]

#1579: fix remuxing of imaadpcm in wav
-------------------------------------+-------------------------------------
               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
-------------------------------------+-------------------------------------
 ms codec can't decode remuxed file because frame_size is set to 0 with
 "-acodec copy"

 http://samples.mplayerhq.hu/A-codecs/ima-adpcm/test_ima_adpcm.wav


 libavformat/riff.c:
 {{{
     } else if (enc->codec_id == CODEC_ID_GSM_MS || enc->codec_id ==
 CODEC_ID_ADPCM_IMA_WAV) {
         hdrsize += 2;
         bytestream_put_le16(&riff_extradata, frame_size); /*
 wSamplesPerBlock */
 +        av_log(enc, AV_LOG_WARNING, "frame_size: %d\n", frame_size);
 }}}


 {{{
 C:\>ffmpeg -i test_ima_adpcm.wav -acodec copy out.wav
 ffmpeg version N-42891-g9054f6b Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Jul 26 2012 02:25:40 with gcc 4.5.0 (GCC) 20100414 (Fedora
 MinGW 4.5.
 0-1.fc14)
   configuration: --prefix=/var/www/users/research/ffmpeg/snapshots/build
 --arch=
 x86 --target-os=mingw32 --cross-prefix=i686-pc-mingw32- --cc='ccache i686
 -pc-min
 gw32-gcc' --enable-w32threads --enable-memalign-hack --enable-runtime-
 cpudetect
 --enable-cross-compile --enable-static --disable-shared --extra-
 libs='-lws2_32 -
 lwinmm -lpthread' --extra-cflags='--static
 -I/var/www/users/research/ffmpeg/snap
 shots/build/include' --extra-ldflags='-static
 -L/var/www/users/research/ffmpeg/s
 napshots/build/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-
 version3
 --enable-nonfree --enable-libx264 --enable-libspeex --enable-libtheora
 --enable-
 libvorbis --enable-libfaac --enable-libxvid --enable-libopencore-amrnb
 --enable-
 libopencore-amrwb --enable-libmp3lame --enable-libvpx --disable-
 decoder=libvpx
   libavutil      51. 65.100 / 51. 65.100
   libavcodec     54. 44.101 / 54. 44.101
   libavformat    54. 20.100 / 54. 20.100
   libavdevice    54.  2.100 / 54.  2.100
   libavfilter     3.  3.100 /  3.  3.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 Guessed Channel Layout for  Input Stream #0.0 : mono
 Input #0, wav, from 'test_ima_adpcm.wav':
   Duration: 00:00:06.28, bitrate: 32 kb/s
     Stream #0:0: Audio: adpcm_ima_wav ([17][0][0][0] / 0x0011), 8000 Hz,
 mono, s
 16, 32 kb/s
 Output #0, wav, to 'out.wav':
   Metadata:
     encoder         : Lavf54.20.100
     Stream #0:0: Audio: adpcm_ima_wav ([17][0][0][0] / 0x0011), 8000 Hz,
 mono, 3
 2 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 size=      25kB time=00:00:06.31 bitrate=  32.5kbits/s
 video:0kB audio:25kB subtitle:0 global headers:0kB muxing overhead
 0.234375%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1579>
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