This is almost too easy. I recently ripped some of my CD's into MP3's with my favorite ripper/encoder, grip. I was so busy feeding it Radiohead CD after CD that i forgot to move the newly encoded MP3's to their final destination before the next batch was ripped/encoded. The end result was a directory structure similar to:

mp3
---radiohead
   ---100395
      ---01-you.mp3
   ---132557
      ---02-creep.mp3
   ---168860
      ---01-planet_telex.mp3
   (etc.)
   ---pablo_honey
   ---the_bends

Each MP3 file was stored in one of those '168860' directories and nothing was inside the directories that are actually named after the album titles. On top of that, i did not know offhand which album that '168860' belongs to. Normally i rip/encode one CD and then move the MP3's - now i have to move each file one at a time to it's proper album/directory and i have to manually look each one up by scanning the CD with my eyes/brain. Ughh ... that could take 30 minutes! (time better spent watching the Simpsons!)

The quick fix? First, move all MP3 files to inside the 'parent' directory (radiohead).

[jeffa@trinity radiohead]# mv */*.mp3 .

Second, run this script:

use MP3::Info;

for my $file (<*.mp3>) {
   my $id3 = get_mp3tag($file);
   my $dir = lc $id3->{ALBUM};
   $dir =~ tr/ /_/;
   system mv => $file => $dir;
}
[download]

Much quicker. ;)

UPDATE: added Aristotle's improved alternative to backticks. Very nice. :) Oh, and as he says, this only works if your MP3's are properly tagged. Since they came straight from grip ... mine were. ;)

Also, i probably should have used zakzebrowski's suggestion, but it is trivial enough to change that i will leave the code untouched. (see his comment below).

OH YEAH: PodMaster says "CDex for yer win32"

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)