What should i be using to get mkv files i have and burning them to DVD or bluray. Preferably with multiple audio tracks and subititles?
Honestly, he probably doesn't. I've spent about six hours now trying to watch Macross Frontier on my television (in my case, via a Lightning-to-HDMI connector), and the short version is that you have to do some kind of transcoding unless you're mirroring a reasonably powerful and modern laptop.
For some godforsaken reason, anime rips from high-resolution sources invariably use 10-bit h.264 (or High-10). This is a problem because nobody makes devices with hardware decoding for High10, which means you have to use slower software decoding. Smaller devices (phones, tablets, rokus, game consoles) generally just can't do that without a LOT of stutter.
So for somebody with a bluray burner and the inclination to use it, bluray conversion software is probably a much easier road to tread than trying to transcode to match whatever hardware decoding you have on your television or PS3 or whatever.