You can split DVD(VOB) moives musics or join any segments of them into a big one without any quality loss, becuase it's(or they're) still . vob file(s) instead of making some kind of codec conversion. "Slim DVD" enables you to burn DVD-9 movie into normal 4.7G blank DVD or choose either a Full Disk (1:1) copy or a main movie only. It'll analyze DVD, encode audio video files, and finally burn a copy of the dvd to DVD media.

The license of this software is Free Trial Software, the price is $29.95, you can free download and get a free trial.