Repeating and repeating again: TMPGEnc DVD Author re-encodes video, whatever setting you would use. Take a look at the manual where it's clearly stated. Files do not match MD5 checksum after compilation and demuxing, and sometimes changes are visible. Re-encoding vary from very slight to complete.
Tsunami is first version of 2.0. There was 2.x available without 'Tsunami' name.
There are four Windoze programs which do not re-encode AV stream: DVD-Lab Pro, DVD Maestro (not sold anymore), Muxman, Architect. IfoEdit and PgcEdit can also be used for authoring but the process is time consuming and rather complicated for a non experienced person.
I prefer DVD Maestro - sold to Apple, and was a base for Mac DVD Studio Pro. DVD Lab Pro is great for advanced authoring but quality of menus, especially motion, is not as good as created by other programs (cannot be reused). Freeware version of Muxman has no menu authoring feature. Architect has been programmed by... hmmm... plumber (?)
so good luck to all who wish to use it -> full version costs around $50000 .....
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