FFMPEG (Fast Forward Moving Pictures Expert Group):

FFmpeg is a  command line tool used for performing various conversion operations on audio and video files.

FFMPEG Installation:

FFmpeg is free and open source. You’ll be able to install it on your Windows PC as well as your Linux server.

sudo apt-get install software-properties-common python-software-properties

sudo add-apt-repository ppa:kirillshkrogalev/ffmpeg-next

sudo apt-get update

sudo apt-get install ffmpeg

Basic Syntax:
The most basic form of an FFmpeg command

ffmpeg -i input_filename output_filename.extension

"ffmpeg" reads from an arbitrary number of input "files", specified by the -i option, and writes to an arbitrary number of output "files", which are specified by output filename.

import os
Input_file_path = '/home/xyz/Input_file_path.mp3'
Output_file_path = '/home/xyz/'(Path to store converted file)
os.system("ffmpeg -i "+Input_file_path+" -strict experimental "+Output_file_path+".extension")

This will convert the video/Audio to required formats.