How to read video stream as input in OpenCV python?

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I agree with the comments above, more details are needed to know exactly how you are planning connect your camera. Here’s a working example for a webcam, notice that you should replace the input_id with your camera’s. You would work on frame for further processing.

import cv2

def get_video(input_id):
    camera = cv2.VideoCapture(input_id)
    while True:
        okay, frame = camera.read()
        if not okay:
            break

        cv2.imshow('video', frame)
        cv2.waitKey(1)
    pass

if __name__ == '__main__':
    get_video(0)

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