I had to convert some audio files. I use Ubuntu 7.10, but i think it could be the same in other distribution.

Install “nautilus-script-audio-convert” (a nautilus script to convert audio files in some different formats)
root~:# apt-get install nautilus-script-audio-convert nautilus-script-manager

Enable script manager
user:~$ nautilus-script-manager enable ConvertAudioFile

Restart Nautilus
user:~$ killall nautilus

Now, if you right-click on an audio file, in the menu you can see Script -> ConvertAudioFile. It could return an error if you don’t have the right codec.

These are some link where you can find codecs for the main audio format.

* lame: encode/decode file mp3 and wav - lame.sourceforge.net
* oggenc (vorbis-tools): encode file ogg - www.xiph.org/downloads
* oggdec (vorbis-tools): decode file ogg - www.xiph.org/downloads
* mppenc: encode file mpc - www.rarewares.org/mpc.html
* mppdec: decode file mpc - www.rarewares.org/mpc.html
* faac: encode file aac - www.audiocoding.com
* faad: decode file aac - www.audiocoding.com
* flac: encode/decode file flac - flac.sourceforge.net

To install these packages could be necessary install some dipendences. I didn’t have any problem to finde them on the Official Ubuntu Repository.

audio, gnome, linux, multimedia, nautilus