python use openCV to traverse all video files in a folder and save them as images

import os
import cv2
cut_frame = 250 # How many frames to cut, just set it yourself
save_path = "C:\ Literature and Information\Handheld Infrared\Pictures"
for root, dirs, files in (r"C:\Documentation and Information\Handheld Infrared"): # Just fill in the folder directory here
 for file in files:
 # Get file path
 if ('.mp4' in file):
  path = (root, file)
  video = (path)
  video_fps = int((cv2.CAP_PROP_FPS))
  print(video_fps)
  current_frame = 0
  while (True):
  ret, image = ()
  current_frame = current_frame + 1
  if ret is False:
   ()
   break
  if current_frame % cut_frame == 0:
   # (save_path + '/' + file[:-4] + str(current_frame) + '.jpg',
   # image) # file[:-4] is to remove the ".mp4" suffix, here my naming format is, the video file name + the current frame number + .jpg, using imwrite can not have the Chinese path and Chinese file name
   ('.jpg', image)[1].tofile(save_path + '/' + file[:-4] + str(current_frame) + '.jpg') # Use imencode to include Chinese in the entire path, and the filename can also be Chinese
   print('Saving' + file + save_path + '/' + file[:-4] + str(current_frame))

import os
# Traversing folders
def walkFile(file):
 for root, dirs, files in (file):
 # root indicates the path to the folder currently being accessed
 # dirs Indicates the list of subdirectories under this folder.
 # files Indicates a list of files in the folder
 # Traversing the document
 for f in files:
  print((root, f))
 # Iterate through all the folders
 for d in dirs:
  print((root, d))
def main():
 walkFile("f:/ostest/")
if __name__ == '__main__':
 main()