Code for How to Extract Audio from Video in Python Tutorial

video2audio_ffmpeg.py

import subprocess
import os
import sys

def convert_video_to_audio_ffmpeg(video_file, output_ext="mp3"):
    """Converts video to audio directly using `ffmpeg` command
    with the help of subprocess module"""
    filename, ext = os.path.splitext(video_file)
    subprocess.call(["ffmpeg", "-y", "-i", video_file, f"{filename}.{output_ext}"], 
                    stdout=subprocess.DEVNULL,
                    stderr=subprocess.STDOUT)


if __name__ == "__main__":
    vf = sys.argv[1]
    convert_video_to_audio_ffmpeg(vf)

video2audio_moviepy.py

import os
import sys
from moviepy.editor import VideoFileClip


def convert_video_to_audio_moviepy(video_file, output_ext="mp3"):
    """Converts video to audio using MoviePy library
    that uses `ffmpeg` under the hood"""
    filename, ext = os.path.splitext(video_file)
    clip = VideoFileClip(video_file)
    clip.audio.write_audiofile(f"{filename}.{output_ext}")


if __name__ == "__main__":
    vf = sys.argv[1]
    convert_video_to_audio_moviepy(vf)