Coming from Windows, doing simple tasks on linux or ubuntu can sometimes appear to be hard.
To make things easier, here's the routine to burn a video DVD on ubuntu:
Use (!) tovid, a wrapper for all the underlying scripts and tools. If you haven't installed it yet
sudo apt-get tovid
use tovid to create the basic menu structure. When I used tovid the last time, the actual transcoding was okay, but madea a few errors we'll fix later. For a full 140 Minutes of DV video, I could get a good fit for the DVD (which is 4,7GB) with quality settings to "6".
After that I edit the tovid-created XML file and remove the superflous track entries.
Then use makexml. This command will give you a DVD with simple menu and three video streams sorted under the topic Dailies:
makexml -overwrite -dvd -menu "/home/user/mydvd/Menu_Container.mpg" -group
-endgroup -out "/home/user/Dailies_DVD"
finally fire up makedvd to calculate the VOB structure
and then burn your data with