Python opencv调用笔记本电脑摄像头

import cv2
import numpy as np


def video_demo():
    capture = cv2.VideoCapture(0)  # 0为电脑内置摄像头
    while (True):
        ret, frame = capture.read()  # 摄像头读取,ret为是否成功打开摄像头,true,false。 frame为视频的每一帧图像
        frame = cv2.flip(frame, 1)  # 摄像头是和人对立的，将图像左右调换回来正常显示。
        cv2.imshow("video", frame)
        c = cv2.waitKey(50)
        if c == 27:
            break


video_demo()
cv2.destroyAllWindows()