Not sure where I'd put this. Please relocate to your discretion. Maybe some of us 3D purists are interested. I stumbled upon a very basic H264 and MVC elementary stream to 3D mkv muxer. Have to test for myself yet. Read here: https://forum.doom9.org/showthread.php?t=183789 Maybe more interesting, OP also happens to mention the best BD & UHDBD demuxer I know. DGDemux. I don't know if this software has ever been discussed on the Zidoo forums, but I think it's worth to point out. There aren't many tools I'd consider mandatory in its genre. Where other modern software (even today) can hopelessly fail on certain discs/ISOs, this one has proven flawless. I use it since the very beginning and never looked back. It saved the day more than once and is still being worked on when new disc issues arise. Also it's free now. http://rationalqm.us/dgdemux/dgdemux.html