Python cv2 screen capture

import numpy as np
import cv2
from PIL import ImageGrab

while True:
    img = ImageGrab.grab(bbox=(0, 1000, 100, 1100)) #x, y, w, h
    img_np = np.array(img)
    frame = cv2.cvtColor(img_np, cv2.COLOR_BGR2GRAY)
    cv2.imshow("frame", frame)
    if cv2.waitKey(1) & 0Xff == ord('q'):
        break
    
cv2.destroyAllWindows()

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