video frame image extraction (video to frame images) (python)

import cv2 import os   input_vid_name = 'input.mp4' output_frame_folder = 'output'   cap = cv2.VideoCapture(input_vid_name) vid_width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)) vid_height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT)) vid_length = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))   if not os.path.exists(output_frame_folder): os.makedirs(output_frame_folder)   for framenum in range(0, vid_length):     print(framenum)     cap.set(cv2.CAP_PROP_FRAME_COUNT, framenum)     ret,frame = cap.read()     if ret is False:         break       # Image Processing     cv2.imwrite(output_frame_folder + '/' + str(framenum).zfill(5) + '.png', frame)     cv2.imshow('frame', frame)     k = cv2.waitKey(1) & 0xff     if k == 27: # Escape (ESC)         break   cap.release() cv2.destroyAllWindows()