new faster grab screen.py

import time
import cv2
import mss
import numpy
from PIL import ImageGrab
from grabscreen import grab_screen

# title of our window
title = "FPS benchmark"
# set start time to current time
start_time = time.time()
# displays the frame rate every 2 second
display_time = 2
# Set primarry FPS to 0
fps = 0
# Load mss library as sct
sct = mss.mss()
# Set monitor size to capture to MSS
monitor = {"top": 40, "left": 0, "width": 800, "height": 640}
# Set monitor size to capture
mon = (0, 40, 800, 640)

def screen_grab():
    global fps, start_time
    while True:
        # Get raw pixels from the screen 
        img = grab_screen(region=mon)
        # Display the picture
        cv2.imshow(title, cv2.cvtColor(img, cv2.COLOR_BGR2RGB))
        fps+=1
        TIME = time.time() - start_time
        if (TIME) >= display_time :
            print("FPS: ", fps / (TIME))
            fps = 0
            start_time = time.time()
        # Press "q" to quit
        if cv2.waitKey(25) & 0xFF == ord("q"):
            cv2.destroyAllWindows()
            break

screen_grab()