Tracking and recording at different resolutions

Python
9

Extracts of my code for results above:

FT = (640,480) #tracking frame size
FW = (1024,720) #writing frame size

# Open devices
video = cv.VideoCapture(0)

video.set(cv.CAP_PROP_FRAME_WIDTH, FT[0])
video.set(cv.CAP_PROP_FRAME_HEIGHT, FT[1])
output = cv.VideoWriter('OCVF.avi',cv.VideoWriter_fourcc(*'XVID'), int(25) , (int(video.get(3)), int(video.get(4))))
#output did not save when using FW in place of video.get 3,4

Then in loop:

 while True:
    # Read a new frame
    ok, frame = video.read()
    output.write(frame)
    frame = cv.flip(frame, -1)
    framer = cv.resize(frame,FT)

    # Update tracker
    ok, bbox = tracker.update(framer)

    # Display result
    cv.imshow("Tracking", framer)