import cv2

# url = "http://192.168.137.136:8085/?action=stream"
url = "http://192.168.137.136:8080/?action=stream"
# 打开网络摄像头
# cap = cv2.VideoCapture(url)
cap = cv2.VideoCapture(0)
cap.set(cv2.CAP_PROP_BUFFERSIZE, 3) # set this solve lag?

# 创建可以调节大小的窗口
cv2.namedWindow("video", 0)
while (1):
    # 读取一帧,如果有剩余帧ret为ture,否则为false
    # ret, frame = cap.read()
    ret, frame = cap.read()
    # print(ret, frame)
    cv2.imshow("video", frame)
    # print(ret)

    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()