Small script for converting mp4 files inside a directory to mp3 into an output folder.

mp4_to_mp3.py

"""
Small script for converting all mp4 files inside a folder to mp3 into an output folder

Requirement : ffmpeg, python30
Usage : python mp4_to_mp3.py -d <input_directory> -o <ouput_directory>

Author: Gtindo.dev
Licence: ISC
"""
import subprocess
import os
import argparse

parser = argparse.ArgumentParser(description="Convert mp4 inside folder to mp3")
parser.add_argument('--dir', '-d', help='Input directory')
parser.add_argument('--out', '-o', help='Output directory')
args = parser.parse_args()


def main(directory, output_dir):
    if directory is None:
        print("[Error] - Argument directory is required, check help for more details")
        return

    try:
        dirs = os.listdir(directory)
        os.makedirs(output_dir, 0o777, exist_ok=True)

        for file in dirs:
            if not is_mp4(file):
                continue

            input_file = os.path.join(directory, file)
            output_file = os.path.join(output_dir, file_mp3(file))

            subprocess.run(
                [
                    "ffmpeg", "-i", input_file, "-vn",
                    "-acodec", "libmp3lame", "-ac",
                    "2", "-ab", "160k", "-ar", "48000",
                    output_file])

    except FileNotFoundError:
        print("[Error] - Directory {} does not exists.".format(directory))


def is_mp4(filename):
    if filename.split(".")[1] == "mp4":
        return True

    return False


def file_mp3(filename):
    return filename.split(".")[0] + ".mp3"


if __name__ == "__main__":
    main(args.dir, args.out)