Meh frame extractor

import os
import cv2
import numpy as np

os.system('cls')

dir = "./"
dirs = ["Videos/", "Video images/"]


def folders():
    dirEx = False
    for i in dirs:
        _dir = dir + i
        if not os.path.isdir(_dir):
            os.mkdir(_dir)
            dirEx = True
    if dirEx:
        print("Missing folders")
        exit()


folders()

def autocrop(image, threshold=0):
    """Crops any edges below or equal to threshold

    Crops blank image to 1x1.

    Returns cropped image.

    """
    if len(image.shape) == 3:
        flatImage = np.max(image, 2)
    else:
        flatImage = image
    assert len(flatImage.shape) == 2

    rows = np.where(np.max(flatImage, 0) > threshold)[0]
    if rows.size:
        cols = np.where(np.max(flatImage, 1) > threshold)[0]
        image = image[cols[0]: cols[-1] + 1, rows[0]: rows[-1] + 1]
    else:
        image = image[:1, :1]

    return image


def isPortret(_img):
    gray = cv2.cvtColor(_img, cv2.COLOR_BGR2GRAY)
    image = _img.copy()
    size = gray.size
    black = np.sum(gray <= 1)
    white = np.sum(gray == 255)
    if (black/size)*100 >= 65:
        h, w = gray.shape
        wc = int(0.9 * w)
        image[0:h, wc:w] = 1
    return image

def scalePic(_pic):
    scale_percent = 60 # percent of original size
    width = int(_pic.shape[1] * scale_percent / 100)
    height = int(_pic.shape[0] * scale_percent / 100)
    dim = (width, height)
    # resize image
    return cv2.resize(_pic, dim, interpolation = cv2.INTER_AREA)




def checkOrMake(_vid, _pic, name):
    print("Getting files from: " + _vid)
    print("Putting files in: " + _pic)
    cap = cv2.VideoCapture(_vid)
    length = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
    success, image = cap.read()
    count = 0
    while success:
        # Crop the image before saving it
        image = autocrop(isPortret(image), 5)
        cv2.imshow(name, scalePic(image))
        # save frame as JPEG file
        #cv2.imwrite(_pic+"/frame%d.jpg" % count, image)
        percentage = count / length * 100
        print('Frame:%d/%d' % (count, length), '%d%% done' % percentage)
        count += 1
        success, image = cap.read()
    cap.release()
    cv2.destroyAllWindows()


def getVideos(_vid, _pic, name):
    if not os.path.isdir(_pic + name):
        os.mkdir(_pic + name)
    checkOrMake(_vid + name, _pic + name, name)


for filename in os.listdir(dir + dirs[0]):
    getVideos(dir + dirs[0], dir + dirs[1], filename)