Cómo extraer audio de video en Python

Aprenda a convertir video a audio usando ffmpeg y subproceso, o usando la biblioteca MoviePy en Python.

Si desea convertir su video a un formato de audio usando Python, entonces está en el lugar correcto. En este tutorial, le mostraré dos métodos simples para extraer el audio de un archivo de video con la ayuda de la biblioteca FFmpeg y MoviePy en Python.

Antes de comenzar, debe tener FFmpeg instalado en su máquina. Si está en Windows, consulte este tutorial donde simplemente lo instala y lo agrega a la variable PATH . Si está en Linux, entonces es sencillo instalarlo usando los siguientes comandos:

$ sudo apt update
$ sudo apt install ffmpeg

Tenga en cuenta que MoviePy depende del software FFmpeg para la lectura y escritura de video, y lo instalará automáticamente cuando lo use por primera vez. Por lo tanto, no debe preocuparse mucho si falla el paso anterior y desea usar el segundo método (es decir, usar MoviePy).

Instalemos MoviePy ahora:

$ pip install moviepy

Método 1: usar FFmpeg directamente

Este método implica usar el módulo de subproceso integrado de Python para el comando FFmpeg apropiado:

import subprocess
import os
import sys

def convert_video_to_audio_ffmpeg(video_file, output_ext="mp3"):
    """Converts video to audio directly using `ffmpeg` command
    with the help of subprocess module"""
    filename, ext = os.path.splitext(video_file)
    subprocess.call(["ffmpeg", "-y", "-i", video_file, f"{filename}.{output_ext}"], 
                    stdout=subprocess.DEVNULL,
                    stderr=subprocess.STDOUT)

if __name__ == "__main__":
    vf = sys.argv[1]
    convert_video_to_audio_ffmpeg(vf)

En la convert_video_to_audio_ffmpeg()función, primero dividimos el nombre del archivo de video de entrada en el nombre del archivo original sin extensión y la extensión en sí, para que podamos obtener el nombre del archivo de salida simplemente agregando la extensión de audio al nombre original. En este caso, es mp3.

Usamos el subprocess.call()método para ejecutar el comando FFmpeg, la -ybandera es para ignorar la solicitud de sobrescritura y -ipara especificar el archivo de video de entrada. El último argumento es el nombre del archivo de salida con la mp3extensión de audio, puede cambiarlo a wavsi lo desea, pero eso resultó en un archivo de audio grande en mi caso por alguna razón.

Por último, se pasa subprocess.DEVNULLa la stdoutdiscusión, y subprocess.STDOUTque stderrpor lo que podemos descartar la salida de FFmpeg. Puede ejecutar el script a través de:

$ python video2audio_ffmpeg.py zoo.webm

¿Dónde zoo.webmestá su archivo de video con cualquier formato?

Método 2: uso de MoviePy

En este método, usamos la biblioteca MoviePy bastante sencilla que usa FFmpeg bajo el capó:

import os
import sys
from moviepy.editor import VideoFileClip


def convert_video_to_audio_moviepy(video_file, output_ext="mp3"):
    """Converts video to audio using MoviePy library
    that uses `ffmpeg` under the hood"""
    filename, ext = os.path.splitext(video_file)
    clip = VideoFileClip(video_file)
    clip.audio.write_audiofile(f"{filename}.{output_ext}")


if __name__ == "__main__":
    vf = sys.argv[1]
    convert_video_to_audio_moviepy(vf)

Aquí, creamos una instancia de la VideoFileClip()clase y luego usamos el write_audiofile()método del audioobjeto del clippara guardarlo como un archivo de audio. Usando el script:

$ python video2audio_moviepy.py zoo.webm

Conclusión

Muy bien, eso es todo por este tutorial rápido, espero que te haya ayudado a realizar tus proyectos de manera rápida y confiable.

Enlace: https://www.thepythoncode.com

#python

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Cómo extraer audio de video en Python
Ray  Patel

Ray Patel

1619518440

top 30 Python Tips and Tricks for Beginners

Welcome to my Blog , In this article, you are going to learn the top 10 python tips and tricks.

1) swap two numbers.

2) Reversing a string in Python.

3) Create a single string from all the elements in list.

4) Chaining Of Comparison Operators.

5) Print The File Path Of Imported Modules.

6) Return Multiple Values From Functions.

7) Find The Most Frequent Value In A List.

8) Check The Memory Usage Of An Object.

#python #python hacks tricks #python learning tips #python programming tricks #python tips #python tips and tricks #python tips and tricks advanced #python tips and tricks for beginners #python tips tricks and techniques #python tutorial #tips and tricks in python #tips to learn python #top 30 python tips and tricks for beginners

Ray  Patel

Ray Patel

1619510796

Lambda, Map, Filter functions in python

Welcome to my Blog, In this article, we will learn python lambda function, Map function, and filter function.

Lambda function in python: Lambda is a one line anonymous function and lambda takes any number of arguments but can only have one expression and python lambda syntax is

Syntax: x = lambda arguments : expression

Now i will show you some python lambda function examples:

#python #anonymous function python #filter function in python #lambda #lambda python 3 #map python #python filter #python filter lambda #python lambda #python lambda examples #python map

Art  Lind

Art Lind

1602968400

Python Tricks Every Developer Should Know

Python is awesome, it’s one of the easiest languages with simple and intuitive syntax but wait, have you ever thought that there might ways to write your python code simpler?

In this tutorial, you’re going to learn a variety of Python tricks that you can use to write your Python code in a more readable and efficient way like a pro.

Let’s get started

Swapping value in Python

Instead of creating a temporary variable to hold the value of the one while swapping, you can do this instead

>>> FirstName = "kalebu"
>>> LastName = "Jordan"
>>> FirstName, LastName = LastName, FirstName 
>>> print(FirstName, LastName)
('Jordan', 'kalebu')

#python #python-programming #python3 #python-tutorials #learn-python #python-tips #python-skills #python-development

Art  Lind

Art Lind

1602666000

How to Remove all Duplicate Files on your Drive via Python

Today you’re going to learn how to use Python programming in a way that can ultimately save a lot of space on your drive by removing all the duplicates.

Intro

In many situations you may find yourself having duplicates files on your disk and but when it comes to tracking and checking them manually it can tedious.

Heres a solution

Instead of tracking throughout your disk to see if there is a duplicate, you can automate the process using coding, by writing a program to recursively track through the disk and remove all the found duplicates and that’s what this article is about.

But How do we do it?

If we were to read the whole file and then compare it to the rest of the files recursively through the given directory it will take a very long time, then how do we do it?

The answer is hashing, with hashing can generate a given string of letters and numbers which act as the identity of a given file and if we find any other file with the same identity we gonna delete it.

There’s a variety of hashing algorithms out there such as

  • md5
  • sha1
  • sha224, sha256, sha384 and sha512

#python-programming #python-tutorials #learn-python #python-project #python3 #python #python-skills #python-tips

How To Compare Tesla and Ford Company By Using Magic Methods in Python

Magic Methods are the special methods which gives us the ability to access built in syntactical features such as ‘<’, ‘>’, ‘==’, ‘+’ etc…

You must have worked with such methods without knowing them to be as magic methods. Magic methods can be identified with their names which start with __ and ends with __ like init, call, str etc. These methods are also called Dunder Methods, because of their name starting and ending with Double Underscore (Dunder).

Now there are a number of such special methods, which you might have come across too, in Python. We will just be taking an example of a few of them to understand how they work and how we can use them.

1. init

class AnyClass:
    def __init__():
        print("Init called on its own")
obj = AnyClass()

The first example is _init, _and as the name suggests, it is used for initializing objects. Init method is called on its own, ie. whenever an object is created for the class, the init method is called on its own.

The output of the above code will be given below. Note how we did not call the init method and it got invoked as we created an object for class AnyClass.

Init called on its own

2. add

Let’s move to some other example, add gives us the ability to access the built in syntax feature of the character +. Let’s see how,

class AnyClass:
    def __init__(self, var):
        self.some_var = var
    def __add__(self, other_obj):
        print("Calling the add method")
        return self.some_var + other_obj.some_var
obj1 = AnyClass(5)
obj2 = AnyClass(6)
obj1 + obj2

#python3 #python #python-programming #python-web-development #python-tutorials #python-top-story #python-tips #learn-python