在python，openCV中使用网络摄像头的问题

import cv2
import urllib.request
import numpy as np

url = 'http://<摄像头IP地址>/video'

stream = urllib.request.urlopen(url)

while True:
    # 读取视频帧
    bytes = stream.read(1024)
    # 将视频帧转换为NumPy数组
    img_array = np.array(bytearray(bytes), dtype=np.uint8)
    # 解码数组为图像
    frame = cv2.imdecode(img_array, 1)
    # 显示图像
    cv2.imshow('Video', frame)
    
    # 按下'q'键退出循环
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

stream.release()
cv2.destroyAllWindows()