Jul-14-2019, 11:13 AM
import numpy as np import cv2 cap = cv2.VideoCapture(0) # Define the codec and create VideoWriter object fourcc = cv2.VideoWriter_fourcc(*'XVID') out = cv2.VideoWriter('output.avi',fourcc, 20.0, (640,480)) while(cap.isOpened()): ret, frame = cap.read() if ret==True: frame = cv2.flip(frame,0) # write the flipped frame out.write(frame) cv2.imshow('frame',frame) if cv2.waitKey(1) & 0xFF == ord('q'): break else: break # Release everything if job is finished cap.release() out.release() cv2.destroyAllWindows()I am learning OpenCV for image processing, I took this code from the official OpenCV site.
I am having doubt in this line 19 "cv2.waitKey(1) & 0xFF == ord('q'):"
I tried to print ord('q'), where I am getting 113 as the output and for cv2.waitKey(1) I am getting -1 as the output. When I tried to print cv2.waitKey(1) & 0xFF I am getting the output as 255. How can 255 be equal to 113. Hence this condition will always fail what is the use of this line please help me out.