XSplit - Low Latency Mode?

[gerneio]

I have the Magewell Pro Capture Quad HDMI Card that I am using to capture 4 XBox 1080p screens simultaneously and then display in one huge 2x2 grid (totaling 4K in resolution) using XSplit and it's full screen projector mode.

 

The purpose of this setup is not to stream, record, or other traditional uses for video capture software, however rather to collectively display all 4 of these XBox's into one display, which will then be, literally, projected onto a 135" projector screen using a 4K projector. This is obviously for massive LAN parties, but when gaming sessions are over, it'll be used as a traditional theater setup. This may sound absurd and impractical, however it is one of the cheaper ways to get four 1080p sources combined together into one seamless 4K grid vs other methods requiring much more specialized/expensive hardware, plus the added benefit that I can control the entire layout, order, and functions of each input and how it is displayed, even reducing down to a 1x2 grid or single mode screen for movies/single player gaming. Additionally, I already have the graphics and CPU power required to push such frames and whatever else is needed.

 

My question simply is: what can I tweek to squeeze the utmost performance out of XSplit to get minimal input/audio lag? I know little to nothing about capture device software.Currently the lag is moderately acceptable. And if not XSplit, then what other "affordable" software can I use that can produce a 2x2, 2x1, and 1x1 scenes of grids, that DOES NOT have audio crazily out of sync (OBS *cough*).

 

Currently with XSplit there is noticeable input lag, which does deter from a completely enjoyable gameplay, however I have used several different capture device software's which all seem to have varying degrees of real-time capture input/audio lag. Some are better than others, which leads me to believe that there are settings that can be tweeked accordingly. One of the ones that seemed to perform the best was an example program in Magewells SDK itself. I can use it and code myself my own custom interface (I'm a developer), but again, I don't know enough about what will reduce the lag on a capture, which is only more complicated on the code side.The Magewell Pro Capture cards seems to also support a 'low latency mode', but I'm not sure how to tap into that or if it will actually help me. Picture quality isn't of the utmost of importance, just needs to be "good enough" for gaming, so I am willing to take a hit on that. But I'm sure there are other things.

 

Can anyone point me in the right direction?

 

PS. Anyone have an easy method for testing/measuring perceived input lag? Hopefully a way without an expensive fancy camera.