m4a comment to lyric

comment_to_lyric.py

#!/usr/bin/env python
import os
import sys
from mutagen.mp4 import MP4

def find_all_files(directory, ext):
  for root, dirs, files in os.walk(directory):
    for file in files:
      if file.lower().endswith('.' + ext):
        yield os.path.join(root, file)

def comment_to_lyric(path):
  m = MP4(path)
  m['\xa9lyr'] = m['\xa9cmt']
  del m['\xa9cmt']
  m.save()

for path in find_all_files(sys.argv[1], 'm4a'):
  print path
  comment_to_lyric(path)

memo.txt

faac doesn't support lyrics in cli options but supports comment.
We can put lyrics in comment and process with this script.

pre.sh

pip install mutagen