How to Convert MP4 to MP3 using Python Tutorial

# load the moviepy module

from moviepy.editor import *

# import the pyqt5 modules

from PyQt5.QtCore import *

from PyQt5.QtGui import *

from PyQt5.QtWidgets import *

# import os module for file exists test

import os.path

# create an object for QApplication

obj=QApplication([])

# create a main window

w=QMainWindow()

# set the window title and its width and height

w.setWindowTitle(“Python MP4 to MP3 Converter”)

# disable the maximize button of window using built-in method setFixedSize()

w.setFixedSize(990,340)

# browse button code for loading input video file

def loadMP4():

# start the file dialog

    fd=QFileDialog.getOpenFileName(w,”Open MP4 Video”,”c://”,”MP4 Video File(*.MP4);;All Files (*.*)”)

# check the returned tuple is not null for getting the video path

    if len(fd)!=0:

# get the selected path of video file

        path=str(fd[0])

# display the path in the text box

        tb.setPlainText(path)

# convert button code

def convertMP3():

# get the path of input file in the text box

        vpath=tb.toPlainText()

# attach the path of video file to VideoFileClip class

        vc=VideoFileClip(vpath)

# convert video to audio using the special property audio

        ac=vc.audio

# store or write the audio file in the current directory using the built-in method write_audiofile()

        ac.write_audiofile(“file.mp3”)

# check the newly converted mp3 file exists or not using its path with exists() in if condition

        if os.path.exists(“file.mp3”):

            rs.setText(“MP3 File is generated successfully…”)

# create a Label Object

lb=QLabel(w)

lb.setText(“Mp4 to Mp3 Converter”)

# place the label in window

lb.setGeometry(350,10,500,40)

# apply the CSS theme to label using built-in method setStyleSheet()

lb.setStyleSheet(“color:green; font-size:27px; font-style:bold”)

# create another label

msg=QLabel(w)

# add the message to label

msg.setText(“Enter the Video File: “)

msg.setGeometry(20,70,300,40)

msg.setStyleSheet(“font-size:21px; font-style:bold”)

# create text box widget

tb=QTextEdit(w)

# place the text box in windows layout

tb.setGeometry(230,70,490,40)

# set the CSS properties

tb.setStyleSheet(“font-size:21px; font-style:bold”)

# create button widget

bt=QPushButton(“Browse”,w)

bt.setStyleSheet(“font-size:21px; font-style:bold; background-color:orange;color:black”)

# set the size of button

bt.setGeometry(725,70,140,40)

# set the event handler to browse button

bt.clicked.connect(loadMP4)

# add next button for converting MP4 to MP3

ct=QPushButton(“Convert”,w)

# set the CSS style to convert button

ct.setStyleSheet(“font-size:21px;background-color:red;color:white;font-style:bold”)

# place the button 

ct.setGeometry(400,115,140,40)

# add the event handler to button

ct.clicked.connect(convertMP3)

# create a label for displaying the success message

rs=QLabel(w)

rs.setStyleSheet(“font-size:20px; color:#0000e6”)

rs.setGeometry(230,150,500,45)

# display the window

w.show()

# run the PyQt5 application using built in method exec()

obj.exec()