anyone familiar with this software? naa lang ko question...

i've used this software before & was able to encode 3-4 movies in 1 dvd(4.4gb capacity) with medium encoding settings, but now it can't even fit 3 movies in 1 dvd, i've already set the encoding to fast/low quality & made some changes on the default settings but doesn't seem to change at all...

anybody expert on this?