[Python] Kivy Camera display is rotated -90 degrees

I am accessing my camera in android 4.4 using python with kivy framework.

This is my simple code:

from kivy.app import App
from kivy.uix.camera import Camera
from kivy.core.window import Window

class CamApp(App):
def build(self):
return Camera(resolution= Window.size)

CamApp().run()


But when I ran my code, it displayed this:



Ideally, it should look like this:



It looks like the kivy Camera is displaying the output with a built in -90 degrees. Is this normal or a bug? Or should I rotate the display myself?

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