How I can use Kivy (Python) camera

Question

I try to use uix.camera widget and show some wideo from my web-camera. I looked into the documentation and try to use this simply code. But it's just show me a white creen withoud any video (I enabled playing). What I'm doing wrong? Maybe some useful docs\tutorial exist (because from official documentation I understanding a little from many). Thanks for any help.

import kivy
kivy.require('1.9.1')

from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.camera import Camera

class MainApp(App):
    def build(self):
        return Camera(play=True)

if __name__== "__main__":
    MainApp().run()

Answer 1

You need to specify resolution. In my case, I also needed to specify index=1, that is the second camera plugged in my computer.

Example:

import kivy
kivy.require('1.9.1')

from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.camera import Camera

class MainApp(App):
    def build(self):
        return Camera(play=True, index=1, resolution=(640,480))

if __name__== "__main__":
    MainApp().run()