/usr/share/icecast2/web/archives/ffmpeg-1.1.3# ./ffmpeg -i ../event1.ogv -vcodec libx264 -acodec libfaac -s 320x240 -ar 44100 -ab 128k event1.mp4
ffmpeg version 1.1.3 Copyright (c) 2000-2013 the FFmpeg developers
  built on Mar  9 2013 18:55:39 with gcc 4.4.5 (Debian 4.4.5-8)
  configuration: --enable-libx264 --enable-gpl
  libavutil      52. 13.100 / 52. 13.100
  libavcodec     54. 86.100 / 54. 86.100
  libavformat    54. 59.106 / 54. 59.106
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 32.100 /  3. 32.100
  libswscale      2.  1.103 /  2.  1.103
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
[ogg @ 0x232c900] Changing stream parameters in multistream ogg is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[ogg @ 0x232c900] failed to create or replace stream
[theora @ 0x2332e20] 7 bits left in packet 82
[ogg @ 0x232c900] Broken file, keyframe not correctly marked.
Input #0, ogg, from '../event1.ogv':
  Duration: 159957:47:00.63, start: 2.012880, bitrate: N/A
    Stream #0:0: Video: theora, yuv420p, 320x240 [SAR 1:1 DAR 4:3], 30 fps, 30 tbr, 30 tbn, 30 tbc
    Stream #0:1: Audio: vorbis, 44100 Hz, mono, fltp, 80 kb/s
Unknown encoder 'libfaac'