CSI camera - snapshot issue

[thomas-ginestet]

Hello,

I have a project which is the following:
On a jeston Nano, I have a CSI camera. I want to take one picture every 5s from this cam , and then evaluate this picture in a tensorflow model.
The tensorflow part is working without problem if I use pictures on the disk.
The problem is to get one picture every 5 seconds.

I just create this simple piece of code:

cam=nano.Camera(flip=0, width=640, height=480, fps=30)

while True:	
	image = cam.read()
	cv2.imshow("image",image)
	cv2.waitKey(5000)

	if cv2.waitKey(1) & 0xFF == ord(' '):
		break
cap.release()
cv2.destroyAllWindows()

The problem is that, the delay between 2 pictures is really longer than 5s, it seems that the system is laging.
And when I'm sending the picture to the model, it seems that the evaluation is done correctly. Only the display in cv2.imshow seems to have a problem.
Any idea on this issue?

Thanks