Windows runtime WP 8.1 QR scanner

[akoj]

Hello everyone.
I want to implement QR scanner in my app. I know that Ican use ZXING but it works very poorly. Also, how can I combine MVVM pattern and media element? (I cannot use Binding syntax with capture element)

I will appreciate any suggestion.
BTW, I'm usnig Caliburn Micro for building MVVM.