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


     #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)
            if not solf.isSave:
                if status:
                    cv2.imwrite("1.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