import cv2
import numpy as np
cap = cv2.VideoCapture("rtsp://192.168.1.81/vaddio-conferenceshot-eptz-stream")
max_count = 0

# Text
font = cv2.FONT_HERSHEY_SIMPLEX
org = (50, 50)
org2 = (50, 90)
fontScale = 1
color = (255, 0, 0)
thickness = 2

while True:
    ret, src = cap.read()
    upper_left = (int(src.shape[1]/4),int(src.shape[0]/4))
    lower_right = (int(src.shape[1]/4 + src.shape[1]/2),int(src.shape[0]/4 + src.shape[0]/2) )

    gray = cv2.cvtColor(src[upper_left[1]:lower_right[1],upper_left[0]:lower_right[0]], cv2.COLOR_BGR2GRAY)
    sobel = cv2.Sobel(gray, cv2.CV_8U, 1, 0, ksize=3)
    t, thresh = cv2.threshold(sobel, 200, 255, cv2.THRESH_BINARY)
    count = np.sum(sobel)
    if count > max_count:
        max_count = count

    src = cv2.putText(src, 'Max: {}'.format(max_count), org, font, fontScale,
                      color, thickness, cv2.LINE_AA)
    src = cv2.putText(src, 'Current: {}'.format(count), org2, font, fontScale,
                      color, thickness, cv2.LINE_AA)
    src = cv2.rectangle(src, pt1=upper_left, pt2=lower_right, color=(36,255,12), thickness=1)
    cv2.imshow('tresh', thresh)
    cv2.imshow('src', src)
    cv2.imshow('sobel', sobel)
    
    k = cv2.waitKey(10)
    if k == 27:
        break