python如何播放一个wav文件并让你的代码继续运行？

Question

我有这段代码可以播放视频，并检测其中的内容。 每当它检测到视频中的某些内容时，我想听到一些内容，代码如下：

import cv2
import os
video_capture = cv2.VideoCapture('video')
while True:
    _, frame = video_capture.read()
    found = detect_something(frame)
    if found :
        os.system("aplay 'alarm'")
    cv2.imshow('Video',frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
video_capture.release()
cv2.destroyAllWindows()

问题是，每当它播放警报时，视频就会冻结。 我想让闹钟作为背景音播放。 我怎样才能做到这一点？

Answer 1

它需要的是一个胎面：

import cv2
import os
from threading import Thread # Import Thread here
video_capture = cv2.VideoCapture('video')

def music(): # Define a function to go in the Thread
    os.system("aplay 'alarm'")

while True:
    _, frame = video_capture.read()
    found = detect_something(frame)
    if found :
        mus = Thread(target=music) # Create a Thread each time found
        mus.start() # Start the Thread as soon as created
    cv2.imshow('Video',frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
video_capture.release()
cv2.destroyAllWindows()