Python Sleep() 函数干扰了我的视频运动

Question

我正在使用 python 进行我的最后一年项目（面罩检测）。我做了所有的事情，但我的指南建议在我的项目中附加一个通用警报系统。所以我附上了警报系统。这意味着如果有人没有戴口罩，那么它通常会以三种语言（泰米尔语、印地语、英语）发出警报。

但它需要一个单独的时间来运行这三个音频（泰米尔语 3 秒、印地语 2 秒和英语 1 秒）。所以我在我的程序中使用了睡眠功能sleep()。我成功连接了它，但是这个睡眠功能干扰了视频运动。这意味着如果我移动（带面具）并且有人移动（不带面具）它将在 6 秒后显示。所以它是慢动作。我什至尝试过多线程概念，但我无法实现它，所以我想要这个（如果有人没有戴口罩，那么它会播放这些音频，但不会干扰视频帧（慢动作））。

代码：

from tensorflow.keras.applications.mobilenet_v2 import preprocess_input
from tensorflow.keras.preprocessing.image import img_to_array
from tensorflow.keras.models import load_model
from imutils.video import VideoStream
import numpy as np
import imutils
import time
import cv2
import os
import voice
import threading
from pygame import mixer
mixer.init()
#sound=mixer.Sound('mixkit-security-facility-breach-alarm-994.wav')
alert1=mixer.Sound('Tamilalert.mp3')
alert2=mixer.Sound('Hindialert.mp3')
alert3=mixer.Sound('Englishalert.mp3')
#t2=threading.Thread(target=voice.alertsystem())
def detect_and_predict_mask(frame, faceNet, maskNet):
    (h, w) = frame.shape[:2]
    blob = cv2.dnn.blobFromImage(frame, 1.0, (224, 224),
        (104.0, 177.0, 123.0))

    faceNet.setInput(blob)
    detections = faceNet.forward()
    print(detections.shape)

    faces = []
    locs = []
    preds = []

    for i in range(0, detections.shape[2]):
        
            confidence = detections[0, 0, i, 2]

            if confidence > 0.5:
                
                            
                box = detections[0, 0, i, 3:7] * np.array([w, h, w, h])
                (startX, startY, endX, endY) = box.astype("int")

                            
                (startX, startY) = (max(0, startX), max(0, startY))
                (endX, endY) = (min(w - 1, endX), min(h - 1, endY))

                    
                face = frame[startY:endY, startX:endX]
                face = cv2.cvtColor(face, cv2.COLOR_BGR2RGB)
                face = cv2.resize(face, (224, 224))
                face = img_to_array(face)
                face = preprocess_input(face)

            
                faces.append(face)
                locs.append((startX, startY, endX, endY))

    if len(faces) > 0:
        
        faces = np.array(faces, dtype="float32")
        preds = maskNet.predict(faces, batch_size=32)

    return (locs, preds)


prototxtPath = r"face_detector\deploy.prototxt"
weightsPath = r"face_detector\res10_300x300_ssd_iter_140000.caffemodel"
faceNet = cv2.dnn.readNet(prototxtPath, weightsPath)


maskNet = load_model("mask_detector.model")


print("[INFO] starting video stream...")
vs = VideoStream(src=0).start()

while True:
    frame = vs.read()
    frame = imutils.resize(frame, width=1000)

  
    (locs, preds) = detect_and_predict_mask(frame, faceNet, maskNet)


    for (box, pred) in zip(locs, preds):
        
        
          
        (startX, startY, endX, endY) = box
        (mask, withoutMask) = pred

        
        if mask>withoutMask:
            label = "Mask"
            color = (0, 255, 0)
            print("Normal")
        else:
            label = "No Mask"
            color = (0, 0, 255)
            alert1.play()
            time.sleep(3)
            alert2.play()
            time.sleep(2)
            alert3.play()
            time.sleep(1)
            #sound.play()
            #t2=threading.Thread(target=voice.alertsystem())
            #voice.alertsystem()
            print("Alert!!!")
            
        
        label = "{}: {:.2f}%".format(label, max(mask, withoutMask) * 100)

    
                   
        cv2.putText(frame, label, (startX, startY - 10),
                cv2.FONT_HERSHEY_SIMPLEX, 0.45, color, 2)
        cv2.rectangle(frame, (startX, startY), (endX, endY), color, 2)

    
    cv2.imshow("Frame", frame)
    key = cv2.waitKey(1) & 0xFF

  
    if key == ord("q"):
            break


cv2.destroyAllWindows()
vs.stop()

    ```

    

    so kindly see else part of my program. and I hope you understood my problem kindly give solution 

Answer 1

这里是更新的代码，所以你可以瘫痪睡眠功能。

我创建了一个使用线程模块调用的辅助函数。

# helper function 
def wait(time,alert):
    alert.play()
    sleep(time)

.

# the updated for loop
for (box, pred) in zip(locs, preds):
      
   (startX, startY, endX, endY) = box
   (mask, withoutMask) = pred

    
   if mask>withoutMask:

       label = "Mask"
       color = (0, 255, 0)
       print("Normal")

   else:

       label = "No Mask"
       color = (0, 0, 255)
       Thread(target=wait, args=(3,alert1,)).start()
       Thread(target=wait, args=(2,alert2,)).start()
       Thread(target=wait, args=(1,alert3,)).start()
       #sound.play()
       #t2=threading.Thread(target=voice.alertsystem())
       #voice.alertsystem()
       print("Alert!!!")

EDIT2

此代码运行 for 循环，如果 i == 2 则开始播放声音，然后在 3 秒后停止。但请注意我是如何定义警报的。我做了不同的事情。

from threading import Thread
from time import perf_counter, sleep
import pygame
import cv2

alert = pygame.mixer
alert.init()
alert.music.load("path_to_your_mp3_file")


def wait(time, alert):
    alert.music.play()            # starts the music
    #start = perf_counter()
    sleep(time)                   # waits 3 seconds
    #print(perf_counter() - start)
    alert.stop()                  # stops the music


for i in range(10):

    if i == 2:

        Thread(target=wait, args=(3, alert,)).start()

        print("Alert")