I am in the process of re-authoring my standalone dvds
So,with Nero Vision I Imported my first dvd,and just selected the VIDEO_TS
folder of the dvd disc and all the files was joined in a unique mpeg2 file.
Later I used that file with GUI for dvdauthor for make the chapters and a simple menus.

I observed no changes in the quality in terms of video/audio,when I
tested the final dvd.

I see in the Nero video options
many settings,like the Nero SmartEncoding,the codification modes,audio formats
and others.
My question is: That settings affect also when I import the video ?

I don't use Nero for make the final vobs,only for
import a dvd disc to a single mpeg2 file.

Is more reccomendable use dvdecrypter in ifo mode for
make the same (dvd video files -> 1 mpeg2 file) or with the Nerovision is enough ?

Thanks in advance