kivy_opencv_cam.py

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.image import Image
from kivy.clock import Clock
from kivy.graphics.texture import Texture
 
import cv2
import numpy as np
 
class CamApp(App):
 
    def build(self):
        self.img1 = Image()
        layout = BoxLayout()
        layout.add_widget(self.img1)
 
        self.capture = cv2.VideoCapture(0)
 
        Clock.schedule_interval(self.update, 1.0/33.0)
        return layout
 
    def update(self, dt):
        ret, frame = self.capture.read()
        
        if frame:
            buf1 = cv2.flip(frame, 0)
            buf = buf1.tostring()
            texture1 = Texture.create(size=(frame.shape[1], frame.shape[0]), colorfmt='bgr')
            texture1.blit_buffer(buf, colorfmt='bgr', bufferfmt='ubyte')
    
            self.img1.texture = texture1
        else:
            print("No frame read.")
 
if __name__ == '__main__':
    CamApp().run()