www.makemkv.com

Is that drive connected internally or in an external enclosure?

If internally, can you try to use a different SATA cable? Or at least check, if the cables are connected correctly?

If external, what kind of enclosure is it?

Try using a different DVD opening mode

maybe take out the CD-ROM which seem to be in the drive and keep the drive empty while looking up the info on MakeMKV

The Matroska format itself is not deterministic by default when it comes for header and metadata.

But the streams should already be always the same if there wasn't any error on dumping.

You also could use something like Icaros to let Windows display a random frame as thumbnail. Still better than nothing.

you might have a thumbnail provider for video files, they usually just take one random frame from the video. The image file in the cover would always be the same.

It is usually a cover image, which is e.g. shown in Windows File Explorer when thumbnails are shown for video files.

Little detail: CSS protection will be removed upon backup.

I can confirm, that MakeMKV has no problems with RipGuard or ARccOS. I myself had many DVDs (on BluRays there is no such copy protection) with that and MakeMKV read them without problems. As much as I know, e.g. RipGuard has a certain string in the first sectors of the discs sectors, thus MakeMKV kn...

For preservation you can use DiscImageCreator or Redumper like the ReDump project does: http://wiki.redump.org/index.php?title=Dumping_Guides

I don't think, it is upon MakeMKVs target to do such a thing.

Does it happen with the/a previous version?

https://makemkv.com/download/old/

and makemkv proposes to rip all 5 of them, however if i "enlarge" one title by clicking upon it, it proposes (so it seems) to rip only the Audio section, and Video is not checkmarked; This is not correct. The video part is always ripped. you just cannot see or remove the checkmark for it....

I'm currently using an ASUS BW-16D1HT with the patched firmware and having some trouble with a few UHD discs I have the same drive and recently several Triple Layer UHDs aren't recognized from the drive. So this happens. Some say, crossflashing can help. For me it didn't with all discs. So I bought...

This is probably the reason, why only now Pioneers can be patched. If this would have been done earlier, Pioneer might have programmed additional protections into the firmware. Now they can't do that anymore.

... unselect non-MVC video tracks when a MVC track is available Why would you do that? You need the Normal video track and the MVC track for being able to have a 3D file afterwards. Both parts have different angles of the video for the 3D effect to work. If you just rip one, then you don't have 3D ...