I have a raspberry Pi 4 and I am using a arducam camera along with open Cv it was working fine until now and suddenly is shows error
“code

[WARN:0] global/tmp/pip-wheel-w_lllcn3/opencv-python_622962b8a47a42ed9a5e55c557dab@ed/opencv/modules/video10/src/cap v41.cpp (893) open VIDEOIO (V4L2:/dev/video0): can’t open camera by index”

Everything is same i haven’t changed the code, even the example code stoped working.

I tried

type here
Import cv2

cap = cv2.VideoCapture(-1)

while True:

success, frame = cap.read()

cv2.imshow('win', frame)

cv2.waitKey(1)

I also tried:
cv2.VideoCapture(0,cv2.CAP_DSHOWcv2.VideoCapture(index, cv2.CAP_V4L)
 
'''
And it still didn't work