jimbotron235 said:

You should not need to reencode the video. It is already in h264 format. You would just need to change the container from MKV.

Simply demuxing it and putting it on a BD-R using tsMuxer resulted in an unplayable disc for me (admittedly on a sample of one player, but it's an Oppo BDP-93, which is decently well-regarded, and isn't showing any issues on other BD-R's). Sure it's h264 and 16:9, but there are a few other restrictions when you make a BD-compliant stream too, and maybe one of those is off. Just re-encoding in x264 with the "--bluray-compat" flag produced a stream that worked without problems for me. YMMV. Not really sure about the audio, but since the main track works, I don't care to dig deeper.