A script to sort a directory full of m4b files into their proper folder/album directories that the audiobookshelf application wants.

m4b-sorter.py

import os
import re
import sys
import argparse
import mutagen
import logging

parser = argparse.ArgumentParser(description='Process m4b files.')
parser.add_argument('-s', '--source', dest='source_folder', required=True, help='Source folder containing m4b files')
parser.add_argument('-d', '--destination', dest='destination_folder', required=True, help='Destination folder for new directories')
args = parser.parse_args()


logging.basicConfig(level=logging.INFO, format='%(asctime)s %(levelname)s %(message)s')

root_dir = args.source_folder
destination_folder = args.destination_folder

if not os.path.exists(root_dir):
    logging.error(f'Source folder {root_dir} does not exist')
    sys.exit(1)

if not os.path.exists(destination_folder):
    logging.error(f'Destination folder {destination_folder} does not exist')
    sys.exit(1)

for subdir, dirs, files in os.walk(root_dir):
    for file in files:
        if file.endswith('.m4b'):
            file_path = os.path.join(subdir, file)
            try:
                audio = mutagen.File(file_path)
            except Exception as e:
                logging.error(f"There was an error parsing the m4b file: {file}, {e}")
                logging.error(f"Skipping file: {file}.  Continuing....")
                continue
            album_artist = audio.get("\xa9ART", ["Unknown"])[0]
            album_artist_dir = os.path.join(destination_folder, album_artist)
            if not os.path.exists(album_artist_dir):
                os.mkdir(album_artist_dir)
            name = audio.get("\xa9nam", ["Unknown"])[0]
            album = audio.get("\xa9alb", ["Unknown"])[0]
            book_match = re.search(r'book (\d+)', album, re.IGNORECASE)
            if book_match:
                book_number = book_match.group(1)
                name_dir = os.path.join(album_artist_dir, 'Book ' + book_number + ' - ' + name)
            else:
                name_dir = os.path.join(album_artist_dir, name)
            if not os.path.exists(name_dir):
                os.mkdir(name_dir)
            os.rename(file_path, os.path.join(name_dir, file))
            logging.info(f"Sorted {file_path}")