Solution for Raspberry Pi VIDEOIO ERROR: V4L
I tried -1, 0, 1 as argument for the VideoCapture function, but none of them worked, then what’s the problem?
and then go to Interfacing Options, choose Camera, make sure that the camera is enabled.
If it does not work, use the following command, which is commonly work.
$ sudo modprobe bcm2835-v4l2