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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

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_DSHOW)
cv2.VideoCapture(index, cv2.CAP_V4L)

But nothing works

Error message:

[ WARN:0] global/tmp/pip-wheel-w_lllcn3/opencv-python_622962b8a47a42ed9a5e55c557dab@ed/opencv/modules/videoio/src/cap v41.cpp (893) open VIDEOID (V4L2:/dev/video0): can't open camera by index
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  • Can you please correct the formatting of the code? Also, which error message are you getting?
    – Tino D
    Commented May 6 at 14:19
  • @TinoD i changed the formatting and added the error
    – Kevin Dedhia
    Commented May 6 at 14:27
  • try some of the suggestions here
    – Tino D
    Commented May 6 at 14:34
  • those devices only work with libcamera/libcamera2. they refuse to use standard V4L/V4L2 APIs. you can replicate the issue with any other program that would try to use V4L2, such as ffmpeg, VLC, guvcview...
    – Christoph Rackwitz
    Commented May 6 at 14:37
  • @TinoD i tried it i got a list of 4 indexes that opened but none of them worked they gave timeout error
    – Kevin Dedhia
    Commented May 6 at 15:00
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