打开两个摄像头 画面不同步 有一个慢很多

# -*- coding: UTF-8 -*-
import time
import cv2
import numpy as np
#import pandas as pd

#摄像头IP地址
ip1='192.168.0.21'
ip2='192.168.0.22'

#摄像头登录用户名及密码
user='admin'
password='abcd1234'
cap1 = cv2.VideoCapture("rtsp://"+ user +":"+ password +"@" + ip1 + ":554/h265/ch2/main/av_stream")
cap2 = cv2.VideoCapture("rtsp://"+ user +":"+ password +"@" + ip2 + ":554/h265/ch2/main/av_stream")

ret1, frame1 = cap1.read()
ret2, frame2 = cap2.read()

img1 = cv2.resize(frame1,(200,200))
img2 = cv2.resize(frame2,(200,200))



cv2.namedWindow('camera',cv2.WINDOW_NORMAL)

cv2.resizeWindow('camera',600,200)
#cv2.resizeWindow(ip2,200,200)
#cv2.resizeWindow(ip3,200,200)

sysRun = 1
while sysRun == 1:
    ret1, frame1 = cap1.read()
    img1 = cv2.resize(frame1,(200,200))
#    cv2.imshow(ip1,frame1)
    ret2, frame2 = cap2.read()
    img2 = cv2.resize(frame2,(200,200))
#    cv2.imshow(ip2,frame2)

#    cv2.imshow(ip3,frame3)
    image = np.hstack((img1,img2))
    cv2.imshow('camera',image)

    #按下q键关闭窗体
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

    #time.sleep(3)
cap1.release()
cap2.release()
cap3.release()
cv2.destroyAllWindows()

有没有可能是网络的问题？