Convertxtodvd reduces file size

I converted an mpeg file of 7.68gb and after it was converted the size was 4.85 gb and the quality had definitely suffered. Is this normal? How do I change it to duplicate the original file? Thanks…

Settings -> encoding -> target size. If you use the custom setting, you obviously have to make sure it’s not too large to fit on your media.

mpeg 1 or 2?
If your original was HD mpeg then obviously it will lose quality, DVD size is much smaller than HD.

                                                                                                              Thanks for that, I'm new at this as I'm sure you already guessed. This is a marvelous forum with a wealth of information........