First of all, same problem as this guy:
I've been trying in and out streaming this game since I discovered Xsplit, but without any positive result..
I thought this would be fixed when Xsplit reached version 1, but no.
The game runs perfectly in fullscreen, but it doesn't show up on stream.
If I choose screen region and run the game in windowed, I'm able to stream my gameplay, but the game runs horrible in windowed mode when streaming.
My system specs should be sufficient enough for the game, having no problems with other DX11 titles.