[User 309201]

So the best is to rip ISO in MKV in MVC mode. :-) 
I 'm doing this (for my best 3D film) because of disk cunsumption ... :-)

Well, it's your choice. The reason we started talking about converting to MKV was not to save disk space, it was to avoid the issue the Vero 4K+ has of freezing up the first time you skip when playing certain 3D ISO files. You will save some disk space by converting from ISO to MKV, but probably not very much - you might shrink a 40GB ISO to a 35GB MKV, maybe. (It will vary from film to film).

If you need to save disk space so badly that you are willing to compromise your video quality to do it, by all means convert to low-bitrate SBS. They're your videos - do what you want.

I just wanted to make sure that people understand that converting to MKV doesn't necessarily mean losing video quality.