Capture images from webcam stream

webcam.py

import cv2

capture = cv2.VideoCapture(0)
capture.set(3, 320) #set width of frame
capture.set(4, 200) #set hieght of frame
capture.set(5, 20) #set FPS
capture.set(10, 20) #set brightness 
successful = True
while successful:
  successful, image = capture.read()
  cv2.imshow("preview", image)  
 
  key = cv2.waitKey(1) & 0xFF        
  if key == ord("q"):
    break