Python Bulk Music Metadata Script

meta.py

#!/usr/bin/python
'''
Parses meta data from filenames using a simple regex
This was done for my specific case where files where like "[Gerne] - Artist - Filename (feat. Otherartist)"
You'll probably have to adjust the regex for your use case

Uses mutagen for meta-info stuff
'''
import sys
import os
import re
from mutagen.mp4 import MP4
if len(sys.argv) < 2:
	print "Usage:"
	print os.path.basename(sys.argv[0]), "<filename.m4a> [filename2.m4a filename3.m4a ...]"
	exit()
for filename in sys.argv[1:]:
	if not os.path.exists(filename):
		print "Specified file (" + filename + ") does not exist"
		exit()
	print filename
	infore = re.compile("(?:\[([^\]]+)\] - )?([^-]+) - ([^\[^\(]+)(?:\(feat. ([^)]+)\))? (?:.*)?")
	info = infore.findall(os.path.basename(filename))[0]
	if len(info) != 4:
		print "Invalid info: ", info
		exit()
	meta = MP4(filename)
	meta['\xa9nam'] = info[2]
	meta['\xa9ART'] = info[1]
	if info[3]:
		meta['\xa9ART'] += " feat. "+info[3]
	if info[0]:
		meta['\xa9gen'] = info[0]
	meta.save(filename)