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我写了一个程序，当检测到人脸时会发出警告声（播放音频文件）

但是，当检测条件被触发时，声音文件总是会在 10~30 秒后开始播放。

如果把它从条件句中去掉，作为背景音乐播放，就没有问题。请问怎么解决？

谢谢！

我用来播放声音的代码：

winsound.PlaySound('1.wav', winsound.SND_FILENAME|winsound.SND_ASYNC)

完整代码：

# -*- coding: utf-8 -*-
import dlib
import cv2
import imutils
import winsound
import os
import multiprocessing
import winsound 
import time
from winsound import SND_ASYNC 
import pygame
from pygame import mixer

#chose camera

cap = cv2.VideoCapture(0, cv2.CAP_DSHOW)
#change size
cap.set(cv2. CAP_PROP_FRAME_WIDTH, 640)
cap.set(cv2. CAP_PROP_FRAME_HEIGHT, 360)

#Get the default face detector
detector = dlib.get_frontal_face_detector()
#Load 68 feature point models according to the shape_predictor method, this method is a detector for facial expression recognition
predictor = dlib.shape_predictor( 'shape_predictor_68_face_landmarks.dat')
#When the camera is turned on, each frame is detected
#pygame.mixer.init()
#mixer.music.load('incoming.mp3')
#mixer.music.play(-1)
#winsound.PlaySound('incoming.wav', winsound.SND_FILENAME| winsound.SND_ASYNC  )
while(cap.isOpened()):
    #Read frame information
    ret, frame = cap.read()

    #Detect faces
    face_rects, scores, idx = detector.run(frame, 0)

    #Retrieve the detection result
    for i, d in enumerate(face_rects):
      x1 = d.left()
      y1 = d.top()
      x2 = d.right()
      y2 = d.bottom()
      text = " %2.2f ( %d )" % (scores[i], idx[i])

      #Draw a rectangular area for detecting faces
      cv2.rectangle(frame, (x1, y1), (x2, y2), ( 0, 255, 0), 4, cv2. LINE_AA)

      #Mark the face detection score and face direction sub-detector number
      cv2.putText(frame, text, (x1, y1), cv2. FONT_HERSHEY_DUPLEX,
      0.7, ( 255, 255, 255), 1, cv2. LINE_AA)

      #play sound

      if scores[i]>0.3 and  idx[i]==0 :
        print(text)

        #pygame.mixer.pre_init(48000, 16, 2, 4096)
        winsound.PlaySound('incoming.wav', winsound.SND_FILENAME| winsound.SND_ASYNC  )


    #Output to screen
    cv2.imshow( "Face Detection", frame)

    #If you press the ESC key, you exit
    if cv2.waitKey( 10) == 27:
       break

#Free memory
cap.release()
#Close all windows
cv2.destroyAllWindows()

和这里的 gprof2dot

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