Shell script to encode FLAC to mp3 while keeping tags

Dependencies: metaflac flac lame sed and any UNIX shell.

export FLACOPTS=<options for flac> # default: -s
export LAMEOPTS=<options for LAME> # default: --vbr-new -V 0 --quiet
flac2mp3 <in.flac> <out.mp3>

Tags are preserved by reading the metadata with metaflac and using sed to substitute ID3v2.3 fields for the metaflac tag names. Additional tags can be supported by adding more patterns like

s/^[metaflac tag name]=/[ID3v2.3 field]=/p
s/^[metaflac tag name]=/TXXX=[description]=/p

The former applies for frames described in the ID3v2.3 specification, and the latter for user-defined frames (e.g., MusicBrainz metadata).