import cv2
video = cv2.VideoCapture('Town.avi')
while video.isOpened():
    ret, frame = video.read()
    # cvtColor in opencv is used to change colorspace
    grayscale = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    cv2.imshow('Orignal', frame)
    cv2.imshow('Gray', grayscale)
    cv2.waitKey(1)

video.release()
cv2.destroyAllWindows()