kernel died, restarting

[Omar amaqtari]

I want to read images from my laptop camera (using cv2.VideoCapture().read(), frame by frame). then display them in the same window, first frame without any change (colored) second frame after change it into grayscale and so on.

every time I try that, the cv2.imshow window doesn't respond and the kernel shows me an image I displayed a week ago and then dies.