Python Frame extractor

import os, cv2
from os import walk

currentWorkingDirectory = os.getcwd()
files = []

for (dirpath, dirnames, filenames) in walk(currentWorkingDirectory + "/Video"):
    files.extend(filenames)

if not files:
    print("== No files found ==")
else:
    for file in files:
        if ".mp4" in file:
            print(currentWorkingDirectory + "/Video/" + file)
            vidcap = cv2.VideoCapture(currentWorkingDirectory + "/Video/" + file)
            success,image = vidcap.read()
            count = 0
            success = True
            output = currentWorkingDirectory + "/Output/" + file

            if not os.path.isdir(output):
                os.mkdir(output)

            while success:
              cv2.imwrite(output + "/frame" + str(count) + ".jpg", image)
              success,image = vidcap.read()
              print ("Frame - " + str(count) + " of " + file)
              count += 1

            print("\n===============" + len(file) * "=")
            print("== Finished " + file + " ==")
            print("===============" + len(file) * "=" + "\n")

print("======= Done =======")