Extract Audio From Video Using Python

In this article, we will build a project on how to extract audio from video using Python. Several libraries and techniques are available in Python for converting Video to Audio. We will use the moviepy library to convert video to audio in this project.

For building this project make sure that you have the latest version of Python installed in your system. Let’s get started!

Extract Audio from Video using Python: Project Overview

Project Name:	Extract Audio from Video using Python
Abstract	It’s a GUI-based project, we will create a GUI to select any video to extract audio from it. We will use the Tkinter library for GUI.
Language/s Used:	Python
IDE	Thonny and PyCharm are recommended
Python version (Recommended):	Python 3.x
Database:	Not required
Type:	Desktop Application
Recommended for	Beginners and Intermediates

Steps to Extract Audio from Video using Python with MoviePy library

Handling the video in its raw binary format will become complicated and hence for this purpose, we will make use of an external library called moviepy. MoviePy can read and write all the most common audio and video formats, including GIF, and runs on various operating systems such as Windows, Linux, and macOS, with Python version 2.7 and above.

1. Install moviepy library

This library does not come inbuilt and hence we need to install and we will use the package manager pip for this purpose. To install the moviepy Library, open the terminal and write the following command

pip install moviepy

2. Import moviepy library

Now, let’s get started by importing the libraries. We need to import the moviepy package or the editor class alone specifically.

# Import moviepy
import moviepy.editor

3. Load the video

Before we move to the next step, let’s learn about video formats. We should know our video’s format to do the conversion without any problem. There are many video formats, some of the common formats are WMV (wmv, wma, asf*), OGG (ogg, oga, ogv, ogx), 3GP (3gp, 3gp2, 3g2, 3gpp, 3gpp2) and MP4 (mp4, m4a, m4v, f4v, f4a, m4b, m4r, f4b, mov).

We need to create a VideoFileClip object by referencing the video file through the parameter.

#Load the Video Clip
video = moviepy.editor.VideoFileClip("Video.mp4")

Inside the method, we are adding the path of the video. The video we are going to convert is in mp4 format.

4. Extract the audio

Besides the video format, it’s also a good practice to know some audio formats. Here are some of the common formats MP3, AAC, WMA, and AC3. Now, we have some ideas about both formats. It’s time to do the conversion using the MoviePy library.

We will now extract the audio of the video that we defined. Extracting the audio is as simple as accessing the audio member of the VideoFileClip object that we created. Then we have to write the extracted audio into a different file whose filename has to be specified.

#Extract and export the Audio
video.audio.write_audiofile("Audio.mp3")

We will convert the video to MP3 format, it is the most common one. Depending on the requirement, we can change the format. For example, while using audio for speech recognition, the wav format works better.

# Import moviepy
import moviepy.editor

#Load the Video
video = moviepy.editor.VideoFileClip("Video.mp4")

#Extract the Audio
audio = video.audio

#Export the Audio
audio.write_audiofile("Audio.mp3")

Complete Python GUI code for Extracting Audio from Video

We can easily learn and build Tkinter Video to Audio Converter in Python because it has a lot of classes and functions for this purpose. So now, let’s start with the implementation part. You can understand the code line-by-line with the help of comments.

# Import the moviepy library
import moviepy.editor as me

# Import required functions from the tkinter 
from tkinter import *
from tkinter.filedialog import askopenfilename,asksaveasfilename

# Create variable to store audio filename
filename=''

def convert():
        global filename
        filetypes=(("Audio files","*.mp3 , *.waw , *.ogg"),("All files","*.*"))
        
        #Load the Video Clip
        video=me.VideoFileClip(filename)
        
        #Extract the Audio
        audio=video.audio
        
        #Export the Audio
        file=asksaveasfilename(filetypes=filetypes)
        audio.write_audiofile(f'{file}{format.get()}')
        
        #Create a label to display Converted
        label5=Label(root,text="Converted!!!",font=("Arial",18),fg="green")
        label5.config(bg="pink")
        label5.pack()
        label5.place(x=450,y=300)
        
def select():
    global filename
    filetypes = (
        ('video files', '*.WEBM , *.MPG, *.MP2 , *.MPEG , *.MPE , *.MPV , *.MP4 , *.M4P , *.M4V , *.AVI , *.WMV , *.MOV , *.QT , *.FLV , *.SWF , *.AVCHD'),
        ('All files', '*.*')
    )
    filename=askopenfilename(filetypes=filetypes)
    
    # Create a label to diaplay video selected
    label3.config(text="Video Selected",fg="green")
    label3.config(bg="pink")
    
    # Create a label 
    label4=Label(root,text="Select Audio format",font=("Arial",18))
    label4.config(bg="pink")
    label4.pack()
    label4.place(x=125,y=250)
    
    # Create options to choose audio format
    options=[".mp3",".ogg",".wav"]
    format.set(".mp3")
    menu=OptionMenu(root,format,*options)
    menu.pack()
    menu.place(x=375,y=250)
    
    # Create a button to convert video to audio
    button3=Button(root,text="Export",bg='light blue',font=("Harlow Solid",12),command=convert,width=10,height=1)
    button3.pack()
    button3.place(x=250,y=300)

# Create the basic GUI window
root=Tk()

# Set the background color of GUI application
root.configure(bg='pink') 

# Set the geometry of the GUI application
root.geometry("700x450")
root.minsize(600,350)
root.maxsize(600,350)

# Set the title of the GUI application
root.title("Video to Audio Converter")

# Create a label for heading
label1=Label(root,text="Extract Audio from Video",font=("Arial",32))
label1.config(bg="pink")
label1.pack()

# Create a label to display Select any Video file
label2=Label(root,text="Select any Video file",font=("Arial",18))
label2.config(bg="pink")
label2.pack()
label2.place(x=190,y=100)

# Create a button for choosing video
button1=Button(root,text="Choose file",bg='light blue',font=("Harlow Solid",12),command=select,width=10,height=1)
button1.pack()
button1.place(x=250,y=200)

label3=Label(root,font=("Footlight MT",18,"bold"))
label3.pack()
label3.place(x=225,y=150)
format=StringVar()

# Start the GUI application
root.mainloop()

Steps to use this GUI app to Extract Audio from Video using Python

Step 1:

Step 2:

Step 3:

Step 4:

Once we click on the convert button, we need to specify the name of the audio file which needs to be saved.

We can see that our Audio file is saved in the corresponding folder.

Conclusion

In this article, we learn how to convert video to audio using two ways. We first saw how to use moviepy library to extract audio from video. Then, we built a GUI application to convert video to audio using Python. There may be many other ways using them you can do this task. Hope this article was helpful for you to learn how to extract audio from video using python. Happy Learning!

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Extract Audio from Video using Python