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I have an MK3D video file containing a 3D movie. But my video player (Skybox for Oculus Quest) does not support MK3D files, only MKV files. My question is, how do I convert my MK3D file into an MKV file, while keeping it as a 3D video?

Both MKV and MK3D are part of the Matroska file format, so I tried simply renaming the file from “.mk3d” to “.mkv”. But that makes it play as a 2D movie, it loses the 3D aspect. So how do I preserve the 3D nature of the file?

Keshav Srinivasan
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2 Answers2

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Renaming the file does not lose any 3D info and the problem is just with the player.

The file-extension difference between .mkv and .mk3d is just a convenience feature as a hint to the player in which mode to do the play, as the file-format is the same for both.

Players that can play both formats usually have a menu setting that can manually set to play .mkv files in 3D mode, or .mk3d in 2D mode.

If Skybox doesn't support playing .mk3d and has no such menu entry, then it just does not support 3D play, so it is time to switch player.

I would suggest the free and open source cross-platform multimedia player VLC as an excellent player.
See the article 3 Useful Tips for Playing 3D Movies with VLC.

You will also find a list of 3D players in the nirsoft article .mk3d Extension - List of programs that can open .mk3d files.

harrymc
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As far as I am aware, there is no conversion needed, as .mkv and .mk3d are in the same container. All you have to do is change the file extension in File Explorer from FileName.mk3d to Filename.mkv and open it up in Skybox. As for support in Skybox, I found this article here:

https://www.howtogeek.com/351815/how-to-stream-vr-videos-and-movies-to-oculus-go-from-pc-or-mac/

This shows how to add a VR/3D file into Skybox, as shown in the article:

How to Fix Movies If They Don’t Play in the Right Format: If you’ve got a 3D or VR video that isn’t playing in 3D or VR, you can fix that by pulling up the controls. Just click once, and then click the little cube on the far right of the menu. This pops up a window with options for playing in 2D, 3D, or VR mode (and for switching between VR 180 and VR 360). If you’re not sure of the exact format of your video, just keep testing until it looks right. Hope this helps!

rtyocum
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