[FFmpeg-trac] #1606(undetermined:new): WMP have problem with wma files generated by FFmpeg (slider is set at the end)
FFmpeg
trac at avcodec.org
Sun Aug 5 13:01:08 CEST 2012
#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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