def videoCapture(): #Use your camera for processing the video. Stop by pressing Q import cv2 import imageProcess as ip cap = cv2.VideoCapture(0) #0 means we capture the first camera, your webcam probably while cap.isOpened(): #or while 1. cap.isOpened() is false if there is a problem ret, frame = cap.read() #Read next video frame, stop if frame not well read if not ret: break ip.imageProcess(frame) #Process frame cv2.imshow("Image traitée", frame) #Show processed image in a window if cv2.waitKey(1) & 0xFF == ord('q'): #If you press Q, stop the while and so the capture break cap.release() cv2.destroyAllWindows()