import cv2
import numpy as np

background = cv2.imread('bg.jpeg')
background =cv2.resize(background,(640,480))

lower_green =np.array([35,100,100])
upper_green =np.array([85,255,255])

cap =cv2.VideoCapture("green.mp4")

if not cap.isOpened():
    print("Video not found")
    exit()
    
while True:
   ret,frame = cap.read()
   
   frame = cv2.resize(frame,(640,480))
   
   hsv = cv2.cvtColor(frame,cv2.COLOR_BGR2HSV)
   
   mask = cv2.inRange(hsv,lower_green,upper_green)
   mask_inv = cv2.bitwise_not(mask)
   
   person = cv2.bitwise_and(frame,frame,mask=mask_inv)
   background_part =cv2.bitwise_and(background,background,mask=mask)
   
   result = cv2.add(person,background_part)
   
   cv2.imshow("demo",result)
   if cv2.waitKey(1) & 0xFF == ord('q'):
       break

cap.release()
cv2.destroyAllWindows()