20200404332zhanghailong/day04/monitor/dev/camera.py

from PyQt5.QtCore import QThread  #  多线程实现多任务
import cv2

class CameraDev:
    def __init__(self):
        super(CameraDev,self).__init__()
        self.camera = cv2.VideoCapture(0,cv2.CAP_DSHOW)  #摄像头编号从0开始
        self.isSave = False

     #线程的任务
    def run(self):
        #摄像头的操作
        # 1.打开摄像头
        while True:
            # 2.循环抓取视频帧
            status,img = self.camera.read()
            print(status,img.shape)
            if status:
                img = cv2.cvtColor(img,cv2,COLOR_RGB2BGR)
                if not self.isSave:
                    cv2.imwrite("2,jpg",img)
                    self.isSave = True
                
            # 3.显示到窗体  
            print("视频处理")
            QThread.usleep(100000)
        # self.camera.close()   #关闭摄像头
        # self.camera.release() #释放设备