#!/usr/bin/env python3

import cv2

cam_port = 2
cam = cv2.VideoCapture(cam_port)

while True:
    result, image = cam.read()

    cv2.imshow('Camera', image)

    if cv2.waitKey(1) & 0xFF == ord('s'):
        cv2.imwrite('capture.png', image)

    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cam.release()
cv2.destroyWindow('Camera')
cv2.destroyAllWindows()