pawel@K2:~/Desktop$ ffmpeg -i Vampires\ are\ alive.flv -ab 56 -ar 22050 -b 500 -f xvid -s 220x176 Vampires\ are\ alive.avi
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2004 Fabrice Bellard
  configuration:  --enable-gpl --enable-pp --enable-pthreads --enable-vorbis --enable-libogg --enable-a52 --enable-dts --enable-libgsm --enable-dc1394 --disable-debug --enable-mp3lame --enable-faadbin --enable-faad --enable-faac --enable-xvid --enable-x264 --enable-amr_nb --enable-amr_wb --enable-shared --prefix=/usr
  libavutil version: 0d.49.0.0
  libavcodec version: 0d.51.11.0
  libavformat version: 0d.50.5.0
  built on Mar 21 2007 14:14:05, gcc: 4.1.2 (Ubuntu 4.1.2-0ubuntu4)

Seems that stream 1 comes from film source: 1000.00 (1000/1) -> 30.00 (30/1)
Input #0, flv, from 'Vampires are alive.flv':
  Duration: 00:03:01.4, bitrate: N/A
  Stream #0.0: Audio: mp3, 22050 Hz, mono
  Stream #0.1: Video: flv, yuv420p, 320x240, 30.00 fps(r)
Unknown input or output format: xvid
pawel@K2:~/Desktop$