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VideoBackgroundConfig for video mode

I have modified the vuforia sample app, and used for my app. I'm displaying content on portrait & landscape mode then taking picture. If my camera mode in portrait the VideoBackgroundConfig: size: 768,1024 & landscape VideoBackgroundConfig: size: 768,1024. Why the landscape VideoBackgroundConfig is not changing. 

But if i launch the app in landscape mode, VideoBackgroundConfig: size: 1365,1024 & portrait also VideoBackgroundConfig: size: 1365,1024.

Does the camera is locking while rotate? If it locking means how can i change?

 

 

 

My application need to be access without internet. So, i prefered vuforia sample. The books sample need Internet. Without internet we can't enter the CameraView. Does it possible to run camera View in the book sample without internet?