To my best knowledge Media Foundation API has no support for infrared cameras. Microsoft did not update the API to extend it to such inputs even though it is technically possible when it comes to undocumented.
You can read infrared frames through a newer API offered for UWP development: Process media frames with MediaFrameReader, the keyword there is this: MediaFrameSourceKind.Infrared. This API is built on top of Media Foundation and Sensor APIs and gets you infrared cameras even though underlying Media Foundation alone has no equivalent public interface.
Given that this is UWP API, you might have troubles fitting this all together with OpenCV if you need the latter. UWP/OpenCV bridging might be on help there: Create a helper Windows Runtime component for OpenCV interop.
Since OpenCV is supposedly interfacing directly to traditional Windows APIs, DirectShow and Media Foundation, it is highly unlikely that it is capable of capturing infrared stream out of the box, unless, of course, the driver itself represents it as normal video. "Proper" markup on Surface Pro as infrared, thus, hides sensor from the mentioned APIs and, respectively, OpenCV.
Is it possible to call the UWP API from a WPF .NET app?
See stackoverflow.com/questions/33692898/…
I saw that before I posted the comment. I tried it but couldnt find the Windows.Devices.Perception namespace via the DLL they were referring to.
Oh, I just noticed the namespace is different in your MediaFrameReader..I will give that a go again.
I can confirm using the trick these APIs are available to .NET. Will now try to get the IR frame.