Convert FLAC to m4a (ALAC)

convert_flac_m4a.py

#!/usr/bin/env python3

from pathlib import Path
import os
import subprocess
import sys


def main(argv):
    if len(argv) < 3:
        print("Too few arguments.", file=sys.stderr)
        return 1

    src = Path(argv[1])
    if not src.exists():
        print("{} does not exist.".format(src))
        return 1
    if not src.is_dir():
        print("{} is not a directory.".format(src))
        return 1

    dst = Path(argv[2])
    if not dst.exists():
        dst.mkdir()
        print("mkdir: {}".format(dst))
    if not dst.is_dir():
        print("{} is not a directory.".format(dst))
        return 1

    for srcpath in src.glob("*"):
        if srcpath.is_dir():
            relative = srcpath.relative_to(src)
            dstpath = dst.joinpath(relative)
            dstpath.mkdir()

    for flac in src.glob("**/*.flac"):
        flac_relative = flac.relative_to(src)

        alac_path = dst.joinpath(flac_relative.with_suffix('.m4a'))
        alac_command = ['ffmpeg', '-i', flac, '-vn', '-acodec', 'alac', alac_path]
        print(alac_command)
        subprocess.check_call(alac_command)

        jpeg_path = dst.joinpath(flac_relative.with_suffix('.jpeg'))
        jpeg_command = ['ffmpeg', '-i', flac, jpeg_path]
        print(jpeg_command)
        subprocess.check_call(jpeg_command)

        artwork_command = ['AtomicParsley', alac_path, '--artwork', jpeg_path, '--overWrite']
        print(artwork_command)
        subprocess.check_call(artwork_command)

        stat = os.stat(srcpath)
        os.utime(path=alac_path, ns=(stat.st_atime_ns, stat.st_mtime_ns))
        os.utime(path=jpeg_path, ns=(stat.st_atime_ns, stat.st_mtime_ns))

    for srcpath in src.glob("*"):
        if srcpath.is_dir():
            stat = os.stat(srcpath)
            relative = srcpath.relative_to(src)
            dstpath = dst.joinpath(relative)
            os.utime(path=dstpath, ns=(stat.st_atime_ns, stat.st_mtime_ns))


if __name__ == '__main__':
    sys.exit(main(sys.argv))