mikestwitness
DeoVR uses filename format. ie
_LR_180.mp4
_TB_360.mp4
_MKX200.mp4
You do not have to recode video or audio, SOME metadata you do have to remux the container. These are usually format specific.
Muxing does nothing to the media itself (video, audio, images, text). It's more like reorganizing your room, the furniture doesn't change. The format (codec) specific metadata would be the manual on how to use the furniture. If this is wrong, the player will not be able to play the file.
Other metadata can be added as custom tags, you can use simple tools for that. ie MetaX. This is more like sticking post-it's on the door of the room. There is no right or wrong for these, you can make them whatever you want. If you want these tags to actually have a function, then the player must be programmed to recognize those tags.
IE when streaming video from SLR with our app, there are hotspots you can jump to. However we don't use Metadata-tags to do this, it is possible to make such features. Then you would be able to use the hotspots offline too.
Many media apps allow you to give files a star rating out of 5 stars, this is such a tag that can be applied to files. Meaning, if you would transfer the file to another computer, the rating would go along with it.