To display Webcam in a tkinter display box

tkinter-webcam.py

import PIL
from PIL import Image,ImageTk
import pytesseract
import cv2
from tkinter import *

width, height = 1920, 1080
cap = cv2.VideoCapture(0)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)

root = Tk()
root.bind('<Escape>', lambda e: root.quit()) 
lmain = Label(root)
lmain.pack()

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

show_frame()
root.mainloop()

VideoCapture's parameter should be an integer variable because it's an index in this case.
String value is accepted only if you want to write the entire device name, e.g. "/dev/video0".

Thanks for pointing it out. Corrected the gist.