Se você gosta do Perl, uma maneira fácil de obter as tags é:
#!/usr/bin/env perl
use File::Find;
use MP3::Tag;
use Cwd;
$dir = ".";
open(OUTFILE,">tags.txt") || die "Can't open: $!\n";
print OUTFILE 'Output for "'.getcwd().'"'." and subdirectories\n";
print OUTFILE "Path;Artist;Title;Track;Album;Year;Genre;File Size\n";
find(\&edits, $dir);
close(OUTFILE);
print "Done\n";
sub edits()
{
$fn=$_;
$not_shown=1;
if ( -f and $fn=~m/.+\.mp3$/ig)
{
$mp3 = MP3::Tag->new($fn);
($title, $track, $artist, $album, $comment, $year, $genre) = $mp3->autoinfo();
$fs= -s $fn;
print OUTFILE "$File::Find::name\$fn;$artist;$title;$track;$album;$year;$genre;$fs\n";
}
if ( -f and $fn=~m/.+\.wav$|\.m4a$/ig)
{
$fs= -s $fn;
print OUTFILE "$File::Find::name\$fn;;;;;;;$fs\n";
}
}
De lá, um pequeno script e você tem o que deseja.