Hi! First of all thank you for your attention.
I'm trying the examples provided, and they work great except the camera of my nexus 4 is rendering all the time black, so I can't see the background (but i can see the augmented reality objects). In my unity using the webcam works fine, is just in the mobile phone and is not a custom app, is using the samples.
Any idea will be welcome :)
Thank you very much!