Code

#mp4_to_mp3.py
import glob
import moviepy.editor as mp

res_paths = glob.glob ('*mp4')

print(res_paths)

def extract_audio(videos_file_path):
    my_clip = mp.VideoFileClip(videos_file_path)
    new_name = videos_file_path.split('.mp4')[0]
    my_clip.audio.write_audiofile(f'{new_name}.mp3')

for i in res_paths:
    extract_audio(i)

Usage

Requirement: python

1. Install python package glob and moviepy
2. Put the python file in the mp4 folder.
   ---folder: my_video_folder---
   - mp4_to_mp3.py
   - Video.mp4
3. Open the folder in Terminal (e.g. cd D:/my_video_folder)
4. Run python mp4_to_mp3.py