error while using python 3.6 and opencv-python cv2

Question

Error in using python open cv to initialize the camera in a face recognition task

import cv2
camera = cv2.VideoCapture(1)
camera.grab()
ret, frame = camera.retrieve()
cv2.namedWindow('frame')

.

OpenCV: out device of bound (0-0): 1
OpenCV: camera failed to properly initialize!

in my laptop camera has number 0. Did you try other numbers ? — furas
– furas, Commented Jul 20, 2019 at 21:22

Narges Sayah · Accepted Answer · 2019-07-20 21:22:35Z

4

The problem is that I'm not using an extra webcam and my pc has just one camera, so this line should be: camera = cv2.VideoCapture(0)

answered Jul 20, 2019 at 21:22

Narges Sayah

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1 Comment

You'd think that, but sometimes the order of USB enumeration is surprising. Try 0. lsusb might provide some evidence, if you have it installed.