Ive been smashing my head with this for a while. I have 2 completely identical .wmv files encoded with wmv3 codec. I put them both through ffmpeg with the following command:
/usr/bin/ffmpeg -i file.wmv -ar 44100 -ab 64k -qscale 9 -s 512x384 -f flv file.flv One file converts just fine, and gives me the following output:
FFmpeg version SVN-r11070, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --prefix=/usr --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --extra-cflags=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic --enable-liba52 --enable-libfaac --enable-libfaad --enable-libgsm --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libxvid --enable-libx264 --enable-pp --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-optimizations --disable-strip libavutil version: 49.5.0 libavcodec version: 51.48.0 libavformat version: 51.19.0 built on Jun 25 2008 09:17:38, gcc: 4.1.2 20070925 (Red Hat 4.1.2-33) Seems stream 1 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 29.97 (30000/1001) Input #0, asf, from 'ok.wmv': Duration: 00:14:22.3, start: 3.000000, bitrate: 467 kb/s Stream #0.0: Audio: wmav2, 44100 Hz, stereo, 64 kb/s Stream #0.1: Video: wmv3, yuv420p, 320x240 [PAR 0:1 DAR 0:1], 400 kb/s, 29.97 tb(r) Output #0, flv, to 'ok.flv': Stream #0.0: Video: flv, yuv420p, 512x384 [PAR 0:1 DAR 0:1], q=2-31, 200 kb/s, 29.97 tb(c) Stream #0.1: Audio: libmp3lame, 44100 Hz, stereo, 64 kb/s Stream mapping: Stream #0.1 -> #0.0 Stream #0.0 -> #0.1 Press [q] to stop encoding frame=25846 fps=132 q=9.0 Lsize= 88486kB time=862.4 bitrate= 840.5kbits/s video:80827kB audio:6738kB global headers:0kB muxing overhead 1.050642% While another file, fails:
FFmpeg version SVN-r11070, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --prefix=/usr --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --extra-cflags=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic --enable-liba52 --enable-libfaac --enable-libfaad --enable-libgsm --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libxvid --enable-libx264 --enable-pp --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-optimizations --disable-strip libavutil version: 49.5.0 libavcodec version: 51.48.0 libavformat version: 51.19.0 built on Jun 25 2008 09:17:38, gcc: 4.1.2 20070925 (Red Hat 4.1.2-33) [wmv3 @ 0x3700940d20]Extra data: 8 bits left, value: 0 Seems stream 1 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 25.00 (25/1) Input #0, asf, from 'bad3.wmv': Duration: 00:06:34.9, start: 4.000000, bitrate: 1666 kb/s Stream #0.0: Audio: 0x0162, 48000 Hz, stereo, 256 kb/s Stream #0.1: Video: wmv3, yuv420p, 512x384 [PAR 0:1 DAR 0:1], 1395 kb/s, 25.00 tb(r) File 'ok.flv' already exists. Overwrite ? [y/N] y Output #0, flv, to 'ok.flv': Stream #0.0: Video: flv, yuv420p, 512x384 [PAR 0:1 DAR 0:1], q=2-31, 200 kb/s, 25.00 tb(c) Stream #0.1: Audio: libmp3lame, 48000 Hz, stereo, 64 kb/s Stream mapping: Stream #0.1 -> #0.0 Stream #0.0 -> #0.1 Unsupported codec (id=0) for input stream #0.0 The only difference I see is with the Input audio codec
Working:
Stream #0.0: Audio: wmav2, 44100 Hz, stereo, 64 kb/s Not working:
Stream #0.0: Audio: 0x0162, 48000 Hz, stereo, 64 kb/s Any ideas?
It is in fact the audio format, which causes trouble. Audio formats are identified by its TwoCC (0x0162 here). You can look up the different TwoCCs here: http://wiki.multimedia.cx/index.php?title=TwoCC and you’ll find:
0x0162 Windows Media Audio Professional V9
This codec isn’t supported yet by ffmpeg and mencoder as far as I know. You can search at google for ‘
ffmpeg audio 0x0162‘ and check for yourself.