Using MKVtoolnix or similar Matroska tools it should be easy enough to convert videos in MKV format to MKV3D format.
Convert Matroska multimedia container to Matroska 3D video format file.
We have found 3 software records in our database eligible for .mkv to .mkv3d file format conversion.
Microsoft Windows software - convert mkv to mkv3d on Windows
A a set of tools to create, alter, split, join and inspect Matroska files (.mkv), MKVtoolnix offers users everything they need for handling Matroska format.
Convert from mkv file
to mkv3d file
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned mkv to mkv3d. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert mkv to mkv3d on OS X
MKVtoolnix for Mac is a video editing suite that allows users to create, alter, split, join and inspect Matroska files (mkv).
Linux/Unix software - convert mkv to mkv3d on Linux
MKVtoolnix allows users to create, alter, split, join and inspect Matroska files (.mkv, .mk3d etc.)