Usually, DVD has two standards: 720 x 480 (NTSC) and 720 x 576 (PAL), both of which belong to SD (Standard Definition).
The video output is mainly depended by the quality of your input source. But you can keep it as close as possible.ġ.
So, there is data loss to some extent and you can't preserve the exact original quality.
Firstly, you should know converting DVD to digital video is a process of re-encoding with compression.