import cv2

cap = cv2.VideoCapture(0)

tracker = cv2.TrackerMOSSE_create()
# tracker = cv2.TrackerCSRT_create()

success, img = cap.read()
bbox = cv2.selectROI('Tracking',img,True)
tracker.init(img,bbox)

def drawBox(img,bbox):
    x,y,w,h = int(bbox[0]),int(bbox[1]),int(bbox[2]),int(bbox[3])
    cv2.rectangle(img,(x,y),(x+w,y+h),(255,255,0),3,1)
    cv2.putText(img, 'Tracking', (75, 100), cv2.FONT_HERSHEY_PLAIN, 1.2, (255, 255, 0), 2)


while True:
    timer = cv2.getTickCount()
    success, img = cap.read()

    success, bbox = tracker.update(img)

    if success:
        drawBox(img,bbox)
    else:
        cv2.putText(img,'Lost',(75,100),cv2.FONT_HERSHEY_PLAIN,1.2,(255,255,0),2)

    fps = cv2.getTickFrequency()/(cv2.getTickCount()-timer)
    #print(int(fps))
    cv2.putText(img,str(int(fps)),(75,75),cv2.FONT_HERSHEY_PLAIN,1.2,(255,255,0),2)

    cv2.imshow('Tracking',img)

    if cv2.waitKey(1) & 0xff == ord('q'):
        break
