Convert 3D H264(MVC) to SBS Format

Hi,

Trying to convert to BR 3D so I can play them from files on my HTPC but struggling.

I can use my MakeMKV application to rip them to a file, an mkv with the H264(MVC) in it. However, the ways to play this a very limited. I'd like to convert this to a standard 1920x1080p (half width SBS) mkv which I can then play on pretty much any device. Can anyone help with a process to do this?