00000000001yangqiang/Day03/ex01/app/devs/video.py

from PyQt5.QtCore import QThread, pyqtSignal
import cv2

class DThread(QThread):

    signal_video = pyqtSignal(bytes, int, int, int)
    def __init__(self):
        super(DThread, self).__init__()
        self.is_over = False
        self.dev = cv2.VideoCapture(0, cv2.CAP_DSHOW)
    
    def run(self):
        while not self.is_over:
            status, img = self.dev.read()
            if status:
                # 处理并发送
                h, w, c = img.shape
                self.signal_video.emit(img.tobytes(), h, w, c)
            else:
                print("设备出错")
                break
            QThread.usleep(100000)


    def close(self):
        self.is_over = True
        while self.isRunning():
            pass
        print("线程正常退出")
        self.dev.release()