Python extract wav from video file

It is a very easy Task using ffmpeg with python subprocess and there is a reason why people are pointing to this solution as a good solution.

This is the basic command extracting audio from a given video File:

ffmpeg -i test.mp4 -ab 160k -ac 2 -ar 44100 -vn audio.wav

The Python Code is just wrapping this command:

import subprocesscommand = "ffmpeg -i C:/test.mp4 -ab 160k -ac 2 -ar 44100 -vn audio.wav"subprocess.call(command, shell=True)

You have to make sure that ffmpeg is a known task, so in your system environment variables, under path, the path to ffmpeg.exe should be listed, or you can just use the full path to the exe in your python code.

this could be better and easier to use than ffmpeg, it's called python-video converter, and can be used to extract the audio from video, https://github.com/senko/python-video-converter , it could be used in conjunction with mpg123, as follows

    from converter import Converter    import os    c = Converter()    clip = 'clip.avi'    conv = c.convert(clip, 'audio.mp3', {'format':'mp3','audio':{'codec': 'mp3','bitrate':'22050','channels':1}})    for timecode in conv:        pass        os.system("mpg123 -w audio.wav audio.mp3")

the converter module extracts the audio from the video and saves it as an mp3 file, while mpg123 converts the mp3 file to mp4,

a different solution is as follows:using moviepy module in python https://github.com/Zulko/moviepy

    import moviepy.editor as mp    clip = mp.VideoFileClip("video.avi").subclip(0,20)    clip.audio.write_audiofile("theaudio.mp3")

the numbers within the subclip function specify start and end of audio, in seconds. you can then use mpg123 to change the audio to any other format

Audio clips can be created from an audio file or from the soundtrack of a video file

from moviepy.editor import *audioclip = AudioFileClip("some_audiofile.mp3")audioclip = AudioFileClip("some_video.avi")

https://zulko.github.io/moviepy/getting_started/audioclips.html