Encode audio files (VBR Profile) and preserve id3 tags used with `lame` program.

lame-vbr-id3tags.py

#!/bin/python
# -*- coding: utf-8 -*-
"""
Encode audio files (VBR Profile) and preserve id3 tags
used with `lame` program.

@Author: Yakir Sitbon <http://www.yakirs.net/>
@Version: 1.0
"""
import os
import sys
from mutagen.easyid3 import EasyID3

lame_fields = {
    'title': 'tt',
    'artist': 'ta',
    'album': 'tl',
    'date': 'ty',
    'genre': 'tg',
    'tracknumber': 'tn',
}

if 3 != len(sys.argv):
    print 'Use: %s <source-file> <target-file>' % (sys.argv[0])
    exit()

try:
    source_id3_file = EasyID3(sys.argv[1])
except IOError as e:
    print "I/O error({0}): {1}".format(e.errno, e.strerror)
    exit()
except:
    print "Unexpected error:", sys.exc_info()[0]
    exit()

lame_args = []
for key in source_id3_file:
    if key in lame_fields:
        lame_args.append('--%s "%s"' % (lame_fields[key],
                                        source_id3_file[key][0]))

lame_args.append(sys.argv[1])
lame_args.append(sys.argv[2])

lame_command = '%s %s' % ('lame --vbr-new -V2', ' '.join(lame_args))

os.system(lame_command.encode('utf-8'))