import cv2, PySimpleGUI as sg
window, cap = sg.Window('Demo Application - OpenCV Integration', [[sg.Image(key='-IMAGE-')], ], location=(800, 400)), cv2.VideoCapture(0)
while window(timeout=20)[0] is not None:
    window['-IMAGE-'](data=cv2.imencode('.png', cap.read()[1])[1].tobytes())