Merge MP3 files in archive packages

merge_mp3.py

#!/usr/bin/env python3

import glob
import os
import shutil
import subprocess
import sys

import rarfile


def expand_package(archive_file, basename) -> [str]:
    with rarfile.RarFile(archive_file) as rar:
        rar.extractall(basename)

    return [f for f in glob.iglob(basename + '/**/*.mp3', recursive=True)]


def merge_mp3(files: [str], basename: str) -> str:
    print(f'files={files}')
    output_file = basename + '.mp3'
    cmd = [
        'ffmpeg',
        '-y', # Overwrite existing file
        '-i',
        f"concat:{'|'.join(files)}",
        '-acodec',
        'copy',  output_file,
        '-metadata', f'title="{basename}"', '-map_metadata', '0:-1',
    ]
    subprocess.call(cmd)
    return output_file


def merge_package(archive_file):
    basename = os.path.splitext(os.path.basename(archive_file))[0]
    files = expand_package(archive_file, basename)
    merge_mp3(files, basename)
    shutil.rmtree(basename, ignore_errors=True)


def merge_packages(archive_files):
    for file in archive_files:
        if '*' in file or '?' in file:
            merge_packages(glob.glob(file))
        else:
            merge_package(file)


def main():
    merge_packages(sys.argv[1:])


if __name__ == '__main__':
    main()

Usage

python merge-mp3.py *.rar

Prerequisite

pip install rarfile

Make sure the executable file of rar or 7z in your path.

sudo apt install unrar

Reference

https://blog.csdn.net/magic_ll/article/details/121676218
https://www.jianshu.com/p/ac643b0c6001
https://superuser.com/questions/314239/how-to-join-merge-many-mp3-files