how to merge audio and video file in python using ffmpeg?

Question

I am trying to create a python script which merge the audio and video file in one (audio+video) file.

And i am using ffmpeg to achieve this but it is not working and i am getting a errors. while running this script here is my script.

import os
import subprocess
import time
from datetime import datetime
def merge_all():
    
 global p
 p =subprocess.Popen('ffmpeg -i temp_vid.mp4 -i temp_voice.wav -c:v copy -c:a aac -strict experimental - 
 strftime 1 ' + dt_file_name ,stdin=subprocess.PIPE,creationflags = subprocess.CREATE_NO_WINDOW)
  time.sleep(2)
  print('merging done')
  os.remove('temp_vid.mp4')
  os.remove('temp_voice.wav')
  print('file delete done')>

here is the error

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\kp\AppData\Local\Programs\Python\Python38\lib\tkinter\__init__.py", line 1883, in __call__
    return self.func(*args)

  File "C:\Users\kp\Desktop\test.py", line 179, in change_icon
    merge_all()

  File "C:\Users\kp\Desktop\test.py", line 104, in merge_all
 
p =subprocess.Popen('ffmpeg -i temp_vid.mp4 -i temp_voice.wav -c:v copy -c:a aac -strict experimental -strftime 1 ' + dt_file_name ,stdin=subprocess.PIPE,creationflags = subprocess.CREATE_NO_WINDOW)

  File "C:\Users\kp\AppData\Local\Programs\Python\Python38\lib\subprocess.py", line 854, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,

  File "C:\Users\kp\AppData\Local\Programs\Python\Python38\lib\subprocess.py", line 1307, in _execute_child

hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
FileNotFoundError: [WinError 2] The system cannot find the file specified

Answer 1

Here is the python code after you have pip install ffmpeg-python in your environment:

import ffmpeg

input_video = ffmpeg.input('./test_Directory/test.webm')

input_audio = ffmpeg.input('./test_Directory/test.webm')

ffmpeg.concat(input_video, input_audio, v=1, a=1).output('./test_Directory/complete.mp4').run()

OR

video = ffmpeg.input('video.mp4')
audio = ffmpeg.input('audio.wav')
out = ffmpeg.output(video, audio, video_path, vcodec='copy', acodec='aac', strict='experimental')
out.run()

OR

cmd = 'ffmpeg -y -i Audio.wav  -r 30 -i Video.h264  -filter:a aresample=async=1 -c:a flac -c:v copy av.mkv'
subprocess.call(cmd, shell=True)                                    
print('Mixing Done')