After years using devices with lots of inconsistencies I arrived to a terrible conclusion, all the mess with formats is caused by brands, every brand use illogical methods to use 3D images when there are good 3D standards that avoid having to learn different things for every 3D device (or to make a different version of our 3D files for each device).
This includes 4V images having to rename files with _2x1 to be recognised, also videos using .h4v extension that you have to rename on your pc, when they actually works directly on the Leia devices with .mp4.
Also storing depth maps in the metadata, that is lost almost every time you copy or share, when there are standards created just for the use that 4V images require, you could store the 4 views on an MPO, and that will also be compatible with other 3D devices, which will read the first two images of the file.
But Leia is not the only device forcing us to learn how to deal and to convert our existing 3D content, almost every new device not being a 3DTV or 3D projector are committing the same mistakes, that were already solved more than 10 years ago (and 3D TVs, projectors, and old cameras already were using them, without inconsistencies).
I made an article explaining it with detail:
Let’s use the existing high quality 3D standards if we want 3D to return. We urgently need to switch to MPO and frame interleaved!