Convert anything into ogg vorbis. Currently "anything" is just mp3 and flac.
Usage: x2ogg average-bitrate source-dir dest-dir
where average-bitrate is the desired averate bitrate (VBR) of the output
ogg vorbis files. It will non-recursively search source-dir for audio
files, convert them to ogg, then write them out to dest-dir.
Example:
$ ls music/
track1.flac track2.flac track3.FLAC
$ x2ogg 150 music/ music/ogg
...
$ ls music/ogg/
track1.ogg track2.ogg track3.ogg