import cv2 import time TIMER = int(20)

Open the camera

cap = cv2.VideoCapture(0)

while True:

# Read and display each frame 
ret, img = cap.read() 
cv2.imshow('a', img) 

# check for the key pressed 
k = cv2.waitKey(125) 

# set the key for the countdown 
# to begin. Here we set q 
# if key pressed is q 
if k == ord('k'): 
    prev = time.time() 

    while TIMER >= 0: 
        ret, img = cap.read() 

        # Display countdown on each frame 
        # specify the font and draw the 
        # countdown using puttext 
        font = cv2.FONT_HERSHEY_SIMPLEX 
        cv2.putText(img, str(TIMER),  
                    (200, 250), font, 
                    7, (0, 255, 255), 
                    4, cv2.LINE_AA) 
        cv2.imshow('a', img) 
        cv2.waitKey(125) 

        # current time 
        cur = time.time() 

        # Update and keep track of Countdown 
        # if time elapsed is one second  
        # than decrese the counter 
        if cur-prev >= 1: 
            prev = cur 
            TIMER = TIMER-1

    else: 
        ret, img = cap.read() 

        # Display the clicked frame for 2  
        # sec.You can increase time in  
        # waitKey also 
        cv2.imshow('a', img) 

        # time for which image displayed 
        cv2.waitKey(2000) 

        # Save the frame 
        cv2.imwrite('camera.jpg', img) 

        # HERE we can reset the Countdown timer 
        # if we want more Capture without closing 
        # the camera 

# Press Esc to exit 
elif k == 27: 
    break

close the camera

cap.release()

close all the opened windows

cv2.destroyAllWindows()