создания плейлиста m3u со вложенных файлов в папке linux формат файлов mp4

import os
import sys

def get_filenames(path):
    filenames = []
    for root, dirs, files in os.walk(path):
        for file in files:
            filenames.append(os.path.join(root, file))
    return filenames

def save_to_m3u(filenames, path):
    with open(path, 'w') as f:
        for filename in filenames:
            f.write(filename + '\n')
    return path

if __name__ == '__main__':
    path = sys.argv[1]
    filenames = get_filenames(path)
    save_to_m3u(filenames, 'playlist.m3u')