2_rescale.py

import cv2 as cv

# img = cv.imread("Photos/cat.jpg")
# cv.imshow("Cat", img)

def rescaleFrame(frame, scale = 0.75):
    # Images, videos and live video
    width = int(frame.shape[1] * scale)
    height = int(frame.shape[0] * scale)
    dimensions = (width, height)

    return cv.resize(frame, dimensions, interpolation=cv.INTER_AREA)

# resized_image = rescaleFrame(img)
# cv.imshow("Image", resized_image)

def changeRes(width, height):
    # Live video
    capture.set(3, width)
    capture.set(4, height)

# Reading videos
capture = cv.VideoCapture("Videos/dog.mp4")
while True:
    isTrue, frame = capture.read()
    frame_resized = rescaleFrame(frame, scale=.2)

    cv.imshow('Video', frame)
    cv.imshow('Video Resized', frame_resized)

    if cv.waitKey(20) & 0xFF == ord("d"):
        break

capture.release()
cv.destroyAllWindows()