How to play sound from a video (cv2) in Python

问题

I'm playing a mp4 file in python, but the sound of the video doesn't comes out, I searched for a while if it's anyway to play the sound, but I could not find anything. Does anyone knows how to play the sound?

I post the code that displays de video :

import cv2
import numpy as np

# Create a VideoCapture object and read from input file
# If the input is the camera, pass 0 instead of the video file name
cap = cv2.VideoCapture('video.mp4')

# Check if camera opened successfully
#if (cap.isOpened()== False): 
 # print("Error opening video stream or file")

# Read until video is completed
while(cap.isOpened()):
  # Capture frame-by-frame
  ret, frame = cap.read()
  if ret == True:

    # Display the resulting frame
    cv2.imshow('Frame',frame)

    # Press Q on keyboard to  exit
    if cv2.waitKey(25) & 0xFF == ord('q'):
      break

  # Break the loop
  else: 
    break

# When everything done, release the video capture object
cap.release()

# Closes all the frames
cv2.destroyAllWindows()

It seems useless that cv2 doesn't allow to play the sound. I'm using Python 3 by the way. Thank you.

ANSWER: OpenCV is a computer-vision library. It does not support audio. If you want to play sound, you can try ffpyplayer. – Thanks to >>> yushulx

来源：https://stackoverflow.com/questions/49546837/how-to-play-sound-from-a-video-cv2-in-python