How to convert mp4 to mp3 python

How to Extract Audio from Video files (Mp3 From Mp4)

Installing Required Packages

Before we begin we need to install a package which would be required to extract audio from video files. You can simply install it with the pip package manager:

That’s it and now we can go forth with our code.

Code to Extract Audio from Video files

Understanding The Code

Line 1: Importing Required Libraries

First, we need to import moviepy which would help us with the conversion process. It is a very handy tool which instrumental library for video editing: cutting, concatenations, title insertions, video compositing (a.k.a. non-linear editing), video processing, and creation of custom effects.

Line 3-8: Defining Our Function

Here we define a function which takes in two arguments :

Then in Line 4 we load the mp4file so that we can perform required operations on it. Nextup, we simply extract the audio from the VideoClipFile object we previously created, and then store it as a file as specified by the arguments passed.

Finally, we close the handles to the the audio and video objects to prevent any unwanted errors before exiting the function.

Line 10: Calling Our Function

Convert and Extract Audio from Video Files

The moviepy library is very portable and it it compatible across Windows, Linux and MacOS, hence it produces similar results for all.

On running our code, we should observe a little tqdm progress bar which should disappear once the extraction process is complete. You can then play it using the music player of your choice!

Conclusion

Mp4 to Mp3 converter in Python

Intro

You can convert any Mp4 to Mp3 using this app.I use tkinter to select file and a for GUI interface.If you don’t want to use tkinter so don’t use.

I didn’t not add error handling code

Requirements

tkinter which is pre installed with python
pip install moviepy

Moviepy: MoviePy (full documentation) is a Python library for video editing: cutting, concatenations, title insertions, video compositing (a.k.a. non-linear editing), video processing, and creation of custom effects. See the gallery for some examples of use.
MoviePy can read and write all the most common audio and video formats, including GIF, and runs on Windows/Mac/Linux, with Python 2.7+ and 3 (or only Python 3.4+ from v.1.0).

Let’s code

First, You need to add these import statements

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I am using class you can use function. Create a class Converter inherit the tkinter class, make a constructor, set the window height and width, create a label, create a button to select the mp4 file and give a function to run on pressing the button.

Get more tkinter projects ideas here

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Give the mp4 file name in VideoFileClip and store the audio in audio variable and now use the write_audiofile function by giving the mp3 file name then close the video, audio and use the showinfo to display a message when the file is converted.

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Now finally create the class instace and run the mainloop function

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The all code look like

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A Complete Guide to Python Convert MP4 to MP3 with MoviePy – Python Tutorial

Python moviepy library can convert mp4 to mp3 easily, in this tutorial, we will write an example to discuss how to convert, you can follow our steps to learn how to do.

Install moviepy

You can use pip command to install moviepy library

If you are using anaconda, you also can use conda command to install.

Import moviepy library

Set mp4 file and mp3 fileВ

You can set the file name of mp4 and mp3.

Convert mp4 to mp3 using python moviepy

In this example, we use mp4 file to create a VideoFileClip object, then get the audo object of this mp4 file, finally save the audo of this mp4 into a mp3 file.

The example code is:

Run this python script, you will find result like:

Then convert mp4 to mp3 successfully.

Notice: When you are converting, you may find error like:

AttributeError: cffi library ‘_openssl’ has no function, constant or global variable named ‘Cryptography_HAS_ECDH’

To fix this error, you can check this tutorial.

8 thoughts on “ A Complete Guide to Python Convert MP4 to MP3 with MoviePy – Python Tutorial ”

How would it to convert contents downloaded with requests.get, without saving to disk?

The method
audioclip.write_audiofile(mp3_file)
Requires a filename.

If I put instead:
audioclip.write_audiofile(r.content)

I’ve got an error

I would like to ask if you need to convert multiple mp4 to mp3. Any suggestion how to do it?

There are three ways to convert multiple mp4 to mp3.
1.Convert mp4 files one by one
2.or concentrate mp3 files to one file
3.Concentrate mp4 files to a one file and then convert it to mp3
Here is a tutorial example:
https://www.tutorialexample.com/python-merge-two-videos-to-one-video-with-moviepy-a-completed-guide-python-tutorial/

Hi
when i run the script i get this error:

Traceback (most recent call last):
File “C:/Users/Sam/Desktop/python/music/mp4 to mp3/mp4 converter.py”, line 11, in
videoclip = VideoFileClip(mp4_file)
File “C:\Users\Sam\AppData\Local\Programs\Python\Python39\lib\site-packages\moviepy\video\io\VideoFileClip.py”, line 88, in __init__
self.reader = FFMPEG_VideoReader(filename, pix_fmt=pix_fmt,
File “C:\Users\Sam\AppData\Local\Programs\Python\Python39\lib\site-packages\moviepy\video\io\ffmpeg_reader.py”, line 37, in __init__
self.fps = infos[‘video_fps’]
KeyError: ‘video_fps’

do you have any recommendations on how to fix this?
Thanks, sam

replace:
videoclip = VideoFileClip(mp4_file)
audioclip = videoclip.audio
audioclip.write_audiofile(mp3_file)
audioclip.close()
videoclip.close()

with:
audioclip = AudioFileClip(mp4_file)
audioclip.write_audiofile(mp3_file)
audioclip.close()

i constantly get a error: (my mp4s path): Permission Denied

Does anyone has an idea why this could be?

you may run your script as an administrator.

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readme.md

MP4 to MP3 converter

I made this script to help me convert my lecture videos into audio files I can put on my phone to revise from. It:

It could in the future:

I made it using ffmpeg-python because I wanted to try it out, but this should be simple enough to convert to a bash script if that is what you prefer. The ffmpeg-python library was made by Karl Kroening and is licensed under the Apache License 2.0. You will also have to install ffmpeg to use this, which is licensed under LGPL but may contain GPL components.

MIT license. More detail in LICENSE.txt.

I have only tested this on Linux. It probably works on other platforms but I can’t guarantee that.

About

Offline MP4 to MP3 converter using ffmpeg-python.

Extracting Audio from Video using Python

I will show you how to do it in just 3 lines of python code

In this post, I will show you how to extract audio from a video recording file. After extracting the audio, you can use it in different kinds of projects. It is a great skill to add to your python programming skillset. To give you some idea, here is an example: in a previous post, I showed how to extract speeches from those audio files using Google Speech Recognition.

Table of Contents:

Extracting Speech from Video using Python

Simple and hands-on project using Google Speech Recognition API

Getting Started

This will a short and simple project. It will not take us more than five minutes to finish the whole project. Before moving to the programming part, I would like to give some information about the library we will use in this project: MoviePy. Let’s get started!

As you can understand from the title, we will need a video recording for this project. It can even be a short recording of yourself speaking to the camera. Using a library called MoviePy, we will extract the audio from the video recording. If you are ready, let’s start by installing the libraries!

Installing a module library is very straightforward in python. You can even install a couple of libraries in one line of code. Write the following line in your terminal window:

Ffmpeg is a leading multimedia framework, that decodes, encodes, transcodes, mux, demux, stream, filter and play pretty much anything that humans and machines have created. (Reference: http://ffmpeg.org/about.html)

MoviePy is a library that can read and write all the most common audio and video formats, including GIFs. In case you are having issues when installing moviepy library, make sure the ffmpeg library is installed correctly.

Now, let’s get to programming. You can use a text editor or Jupyter Notebook. We will start by importing the libraries.

Step 1 — Import MoviePy

Yes, that’s all we need to get the task done. Without losing any time, let’s move to the next step.

Step 2 — Define the Video Clip

Hoping that you already have the video clip ready. Let’s copy the file inside our project folder; this will make it easier to define the video file. MoviePy has a method called VideoFileClip, that will do the whole thing for us:

Inside the method, we are adding the path of the video. And r stands for read.

My recording is in mov format, I will share more about the formats in the next step. It will be helpful when we are exporting the audio file.

Step 3 — Extracting the Audio

This is the final step. We will extract the audio of the video that we defined. Before we move to the final line, let’s learn about the formats. There are many video formats; some of them can be listed as:

We should know our video’s format to do the conversion without any problem. Besides the video format, it’s also a good practice to know some audio formats. Here are some of them:

Now, we have some ideas about both formats. It’s time to do the conversion using the MoviePy library. I will convert it to MP3 format, it is a widespread one. Depending on your use case, feel free to change the format in this line. As an example for speech recognition the wav format works better. Here is the final line of our project:

Video Demonstration

Conclusion

Perfect!! You have created a simple project that extracts the audio of a video without using any software. We also learned about video and audio formats. As I mentioned earlier, you can use these audio files in different kinds of projects. Speech recognition is a great place to get started.

Hoping that you enjoyed reading this post and working on the project. I am glad if you learned something new today. Working on hands-on programming projects like this one is the best way to sharpen your coding skills.

Follow my blog and YouTube channel to stay inspired. Ty,