python 使用opencv打开自己的摄像头并实时查看

import cv2


if __name__ == "__main__":

    video_capture = cv2.VideoCapture(0)

    while True:
        ret, draw = video_capture.read()
        cv2.imshow('live camera', draw)
        if cv2.waitKey(20) & 0xFF == ord('q'):
            break

    video_capture.release()
    cv2.destroyAllWindows()

上面是按q退出的实时摄像显示，效果：