Open a window with webcam image

cam.py

from tkinter import Label, Tk

import cv2
import PIL
from PIL import Image, ImageTk

width, height = 800, 600
cap = cv2.VideoCapture(0)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)

root = Tk()
root.title("Camera")
root.wm_attributes("-topmost", 1)
root.bind("<Escape>", lambda e: root.quit())
lmain = Label(root)
lmain.pack()


def show_frame():
    _, frame = cap.read()
    frame = cv2.flip(frame, 1)
    frame = cv2.resize(frame, (640, 480))
    cv2image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGBA)
    cv2image = cv2.flip(cv2image, 1)
    img = Image.fromarray(cv2image)
    imgtk = ImageTk.PhotoImage(image=img)
    lmain.imgtk = imgtk
    lmain.configure(image=imgtk)
    lmain.after(10, show_frame)


show_frame()
root.mainloop()