m4a2mp3 – convert AAC to MP3. Uses Perl, LAME and faad. Semi-gracefully converts weird iTunes genres to ID3v2, or to “Other” if it’s something else. Uses lame’s new VBR settings, so you end up with an MP3 not massively bigger than the source M4A.

PS: broke the 8000 tunes on the Firefly server …

batch renaming iTunes directories

In partial response to the Ask Metafilter question “How can I rename my music folders on my Mac based on ID3 tags?“:

# itunes_sanity.sh - fix dir names created by iTunes
# only works for mp3s, and not actually tested on a Mac
# created by scruss on Sun Sep 4 22:05:00 EDT 2005

find "$@" -type d -mindepth 1 | while read directory
  artistdir=$(dirname "$directory")
  firstfile=$( find "$directory" -type f -iname '*.mp3' | head -n1 )
  year=$( id3info "$firstfile" | egrep ' TYE ' | sed 's/=== TYE (Year): //; s/[^0-9]*//;' )
  album=$( id3info "$firstfile" | egrep ' TAL ' | sed 's,=== TAL (Album/Movie/Show title): ,,;' )
  echo mv \'$directory\' \'$artistdir/\[$year\] $album\'

So if you were in the terminal, in your music library (one up from the individual artist directories), and you did:

itunes_sanity.sh Dan\ Jones Tripping\ Daisy

you’d get:

mv 'Dan Jones/Get Sounds Now' 'Dan Jones/[2005] Get Sounds Now'
mv 'Dan Jones/One Man Submarine' 'Dan Jones/[2003] One Man Submarine'
mv 'Tripping Daisy/Jesus Hits Like the Atom Bomb' 'Tripping Daisy/[1998] Jesus Hits Like the Atom Bomb'

If that looks okay, run the output through the shell:

itunes_sanity.sh Dan\ Jones Tripping\ Daisy | sh

and all should be well.

You’ll need id3lib, which is probably most easily installed from Fink. Also, this only works for mp3 files; I can’t grok the tag info for AAC files. And finally, this might go seriously screwy on weird characters in filenames. You know my feelings on that …