Не получается сконвертировать swf

$ ffmpeg -i 01_BlenderDefaultScene.swf 01_BlenderDefaultScene.avi
FFmpeg version 0.5, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --prefix=/usr --libdir=/usr/lib --shlibdir=/usr/lib --mandir=/usr/share/man --enable-static --enable-shared --cc=gcc --disable-debug --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libx264 --enable-libxvid --disable-demuxer=v4l --disable-demuxer=v4l2 --enable-x11grab --enable-libspeex --enable-libopenjpeg --enable-libamr-nb --enable-libamr-wb --enable-nonfree --disable-altivec --cpu=pentium4 --disable-vhook --enable-gpl --enable-postproc --enable-avfilter --enable-avfilter-lavf --enable-swscale --disable-stripping --enable-hardcoded-tables
libavutil 49.15. 0 / 49.15. 0
libavcodec 52.20. 0 / 52.20. 0
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 Aug 10 2009 20:26:50, gcc: 4.3.2
[swf @ 0x8067ac0]Compressed SWF format not supported
01_BlenderDefaultScene.swf: I/O error occurred
Usually that means that input file is truncated and/or corrupted.