[Megoldva] ffmpeg -vf

Szeretnék videókat feliratozni az ffmpeg segítségével. Ezt használom (Ubuntu 10.04.4):

ffmpeg -i foo.wmv -vf drawtext="fontfile=/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerif.ttf:text='Text to write':fontsize=20:fontcolor=black:x=100:y=100" foo.flv

Megnéztem, van ilyen: /usr/share/fonts/truetype/ttf-dejavu/DejaVuSerif.ttf

A kimenet:

FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1.3, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --extra-version=4:0.5.1-1ubuntu1.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
libavutil 49.15. 0 / 49.15. 0
libavcodec 52.20. 1 / 52.20. 1
libavformat 52.31. 0 / 52.31. 0
libavdevice 52. 1. 0 / 52. 1. 0
libavfilter 0. 4. 0 / 0. 4. 0
libswscale 0. 7. 1 / 0. 7. 1
libpostproc 51. 2. 0 / 51. 2. 0
built on Dec 21 2011 18:37:21, gcc: 4.4.3
[wmv3 @ 0x8098e10]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 'foo.wmv':
Duration: 00:00:58.57, start: 2.000000, bitrate: 813 kb/s
Stream #0.0: Audio: wmav2, 44100 Hz, stereo, s16, 64 kb/s
Stream #0.1: Video: wmv3, yuv420p, 640x480, 714 kb/s, 25 tbr, 1k tbn, 1k tbc
ffmpeg: unrecognized option '-vf'

A konvertálás, feliratozás nélkül működik:

ffmpeg -i foo.wmv foo.flv