sukko@benzin:~$ ffmpeg -i rnrrobot.wav -ab 160k -vn rnrrobot.ogg
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al.
  configuration: --enable-gpl --enable-pp --enable-swscaler --enable-pthreads --enable-libvorbis --enable-libtheora --enable-libogg --enable-libgsm --enable-dc1394 --disable-debug --enable-shared --prefix=/usr
  libavutil version: 1d.49.3.0
  libavcodec version: 1d.51.38.0
  libavformat version: 1d.51.10.0
  built on Jun  3 2007 20:59:25, gcc: 4.1.3 20070528 (prerelease) (Ubuntu 4.1.2-9ubuntu2)
Input #0, wav, from 'rnrrobot.wav':
  Duration: 00:03:10.9, start: 0.000000, bitrate: 1411 kb/s
  Stream #0.0: Audio: pcm_s16le, 44100 Hz, stereo, 1411 kb/s
File 'rnrrobot.ogg' already exists. Overwrite ? [y/N] y
Output #0, ogg, to 'rnrrobot.ogg':
  Stream #0.0: Audio: vorbis, 44100 Hz, stereo, 160 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
size=    1405kB time=190.9 bitrate=  60.3kbits/s    
video:0kB audio:1384kB global headers:3kB muxing overhead 1.264486%