main.py

import cv2
import winsound
cam = cv2.VideoCapture(0)
while cam.isOpened():
    ret, frame1 = cam.read()
    ret, frame2 = cam.read()
    diff = cv2.absdiff(frame1,frame2)
    gray = cv2.cvtColor(diff, cv2.COLOR_RGB2GRAY)
    blur = cv2.GaussianBlur(gray , (5,5) ,0)
    _, thresh = cv2.threshold(blur , 20 , 255 , cv2.THRESH_BINARY)
    dilated = cv2.dilate(thresh , None , iterations=3)
    contours, _ = cv2.findContours(dilated , cv2.RETR_TREE ,cv2.CHAIN_APPROX_SIMPLE)
    # cv2.drawContours(frame1 , contours , -1 , (0,255,0) , 2)
    for c in contours:
        if cv2.contourArea(c) < 5000 :
            continue
        x , y, w, h = cv2.boundingRect(c)
        cv2.rectangle(frame1 , (x , y) , (x+w ,y+h), (0 , 255 , 0) , 2)
        winsound.Beep(500, 200)
    if cv2.waitKey(10) == ord('q'):
        break
    cv2.imshow('Security Cam', frame1)