E2

import cv2

import numpy as np

cam = cv2.VideoCapture(0)

cv2.namedWindow("test")

img_counter = 0

while True:

    ret, frame = cam.read()

    cv2.imshow("test", frame)

    if not ret:

        break

    k = cv2.waitKey(1)

    if k%256 == 27:

        # ESC pressed

print("Escape hit, closing...")

        break

elif k%256 == 32:

        # SPACE pressed

img_name = "opencv_frame_{}.png".format(img_counter)

        cv2.imwrite(img_name, frame)

print("{} written!".format(img_name))

img_counter += 1

cam.release()

cv2.destroyAllWindows()