[FFmpeg-trac] #1606(undetermined:new): WMP have problem with wma files generated by FFmpeg (slider is set at the end)

[FFmpeg]

#1606: WMP have problem with wma files generated by FFmpeg  (slider is set at the
end)
-------------------------------------+-------------------------------------
               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 play wma file (with WMP) encoded by FFmpeg then the slider is
 automaticly set at the end of the playback.

 The problem is probably that FFmpeg writes $FFFFFF in some place. When I
 repleace it with $000000 then WMP's slider is set at the beginning of the
 playback and moves forward correctly.

 I have created this patch to mark the place where I'm in the file:

 libavformat/asfenc.c:

 {{{
     /* movie chunk, followed by packets of packet_size */
     asf->data_offset = cur_pos;
     ff_put_guid(pb, &ff_asf_data_header);
     avio_wl64(pb, data_chunk_size);
     ff_put_guid(pb, &ff_asf_my_guid);
 -    avio_wl64(pb, asf->nb_packets); /* nb packets */
 +    avio_wl64(pb, 0x2222222222222222);
     avio_w8(pb, 1); /* ??? */
     avio_w8(pb, 1); /* ??? */
 }}}

 When you look at the attached screenshot then you will notice these
 0x22..., after them
 there are problematic $FFFFFF, but I'm not sure what it is. When I modify
 them to $000000
 then WMP's slider is set at the beginning of the playback, not at the end.

 http://samples.mplayerhq.hu/A-codecs/AAC/file.avi


 {{{
 C:\>ffmpeg -i file.avi -vn -acodec wmav2 out.wma
 ffmpeg version N-43160-g752344d Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Aug  3 2012 02:38:06 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. 66.100 / 51. 66.100
   libavcodec     54. 48.100 / 54. 48.100
   libavformat    54. 22.100 / 54. 22.100
   libavdevice    54.  2.100 / 54.  2.100
   libavfilter     3.  5.101 /  3.  5.101
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 [wmv3 @ 0x1ead6e0] WMV3 Complex Profile is not fully supported
 Input #0, avi, from 'file.avi':
   Duration: 00:23:53.53, start: 0.000000, bitrate: 58 kb/s
     Stream #0:0: Video: wmv3 (Complex) (WMV3 / 0x33564D57), yuv420p,
 640x480, 29
 .97 tbr, 29.97 tbn, 29.97 tbc
     Stream #0:1: Audio: aac ([255][0][0][0] / 0x00FF), 48000 Hz, stereo,
 s16, 14
 7 kb/s
     Metadata:
       title           : gs1 AC3 T01 2_0ch 448Kbps DELAY 0ms
 Output #0, asf, to 'out.wma':
   Metadata:
     WM/EncodingSettings: Lavf54.22.100
     Stream #0:0: Audio: wmav2 (a[1][0][0] / 0x0161), 48000 Hz, stereo,
 s16, 128
 kb/s
     Metadata:
       title           : gs1 AC3 T01 2_0ch 448Kbps DELAY 0ms
 Stream mapping:
   Stream #0:1 -> #0:0 (aac -> wmav2)
 Press [q] to stop, [?] for help
 size=     988kB time=00:00:53.76 bitrate= 150.6kbits/s
 video:0kB audio:840kB subtitle:0 global headers:0kB muxing overhead
 17.643010%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1606>
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