opencv 获取rtsp流媒体视频的实现方法

import cv2
# user: admin
# pwd: 12345
# main: 主码流
# ip: 192.168.1.64
# Channels: 实时数据
# 1： 通道
cap = cv2.VideoCapture("rtsp://admin:12345@192.168.1.64/main/Channels/1")
print (cap.isOpened())
while cap.isOpened():
  success,frame = cap.read()
  cv2.imshow("frame",frame)
  cv2.waitKey(1) 

import cv2
# user: admin
# pwd: 12345
# main: 主码流
# ip: 192.168.1.64
# tracks: 回放
# 1： 通道
# time： 开始时间和结束时间的范围
time='starttime=20180613t172206z&endtime=20180613t172230z'
cap = cv2.VideoCapture("rtsp://admin:12345@192.168.1.64:554/main/tracks/1?" + time)
print (cap.isOpened())
while cap.isOpened():
  ret,frame = cap.read()
  cv2.imshow("frame",frame)
  cv2.waitKey(1)