Batch script for audio encoding. Supports MP3, AAC, Vorbis, Opus,
FLAC, AC3 and WAV output and is intended to be used on directories
with audio files. Filtering through MPlayer and automatic tagging with
MediaInfo is also supported.

Optional requirements:
faac, or fdkaac and libfdk-aac (for AAC)
opencore-amr (for AMR)
aften (for AC3)
dcaenc (for dts, note: this is a legal quagmire)