Initialize two usb camera

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1

Have anyone tested to run two USB camera at the same time? I am trying to get it running by following code, seems like the second never going to start.

import cv2

cap0 = cv2.VideoCapture(0)
cap0.set(3,640)
cap0.set(4,480)
ret1, img1=cap0.read()
print(ret1)

cap1 = cv2.VideoCapture(1)
cap1.set(3,640)
cap1.set(4,480)
ret2,img2=cap1.read()
print(ret2)

cap0.release()
cap1.release()

Both are See3Cam connected via USB hub to ZCU104. Are there any other settings I need to take care of?
Thanks in advance.

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2

I have found the problem. The indexes are 0 and 2, not 0 and 1.

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