[FFmpeg-trac] #1965(undetermined:new): mmf: support correctly formats ma-3/5/7

FFmpeg trac at avcodec.org
Sun Nov 25 17:49:39 CET 2012


#1965: mmf: support correctly formats ma-3/5/7
-------------------------------------+-------------------------------------
               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
-------------------------------------+-------------------------------------
 When I remove these check form "libavformat/mmf.c" then ma-3/5/7 samples
 decodes, but sample rate (and channels count for stereo files) is
 identified incorrectly.

 {{{
     /* Tag = "ATRx", where "x" = track number */
 -   if ((tag & 0xffffff) == MKTAG('M', 'T', 'R', 0)) {
 -        av_log(s, AV_LOG_ERROR, "MIDI like format found, unsupported\n");
 -        return -1;
 -    }
 -    if ((tag & 0xffffff) != MKTAG('A', 'T', 'R', 0)) {
 -        av_log(s, AV_LOG_ERROR, "Unsupported SMAF chunk %08x\n", tag);
 -        return -1;
 -    }




     /* Make sure it's followed by an Awa chunk, aka wave data */
 -    if ((tag & 0xffffff) != MKTAG('A', 'w', 'a', 0)) {
 -        av_log(s, AV_LOG_ERROR, "Unexpected SMAF chunk %08x\n", tag);
 -        return -1;
 }}}


 {{{
 C:\>ffmpeg -i ma3.mmf
 ffmpeg version N-46755-ge70144c Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Nov 15 2012 02:38:20 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      52.  6.100 / 52.  6.100
   libavcodec     54. 71.100 / 54. 71.100
   libavformat    54. 36.100 / 54. 36.100
   libavdevice    54.  3.100 / 54.  3.100
   libavfilter     3. 23.100 /  3. 23.100
   libswscale      2.  1.102 /  2.  1.102
   libswresample   0. 16.100 /  0. 16.100
   libpostproc    52.  1.100 / 52.  1.100
 [mmf @ 0x1edc280] MIDI like format found, unsupported
 ma3.mmf: Operation not permitted
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1965>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker


More information about the FFmpeg-trac mailing list