ffmpeg -i west_wish2.swf west_wish_new.swf

FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
 configuration:  --prefix=/usr --libdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include/ffmpeg --extra-cflags=-fPIC --enable-mp3lame --enable-libogg --enable-vorbis --enable-theora --enable-faad --enable-faac --enable-libgsm --enable-xvid --enable-x264 --enable-a52 --enable-a52bin --enable-dts --enable-pp --enable-shared --enable-pthreads --enable-gpl --disable-opts --disable-strip
 libavutil version: 49.0.0
 libavcodec version: 51.7.0
 libavformat version: 50.3.0
 built on May 16 2006 08:14:37, gcc: 4.1.0 20060304 (Red Hat 4.1.0-3)
Input #0, swf, from 'west_wish2.swf':
 Duration: N/A, bitrate: N/A
 Stream #0.0: Audio: mp3, 44100 Hz, stereo
File 'west_wish_new.swf' already exists. Overwrite ? [y/N] y
Output #0, swf, to 'west_wish_new.swf':
 Stream #0.0: Audio: mp3, 44100 Hz, stereo, 64 kb/s
Stream mapping:
 Stream #0.0 -> #0.0
Press [q] to stop encoding
size=     417kB time=52.7 bitrate=  64.9kbits/s
video:0kB audio:411kB global headers:0kB muxing overhead 1.411814%