ok a few weeks ago i reformatted my computerand mainconcept was working fine i could convert a xvid video to dvd put it in dvd movie factory or ulead dvd workshop add a few chapters and the process would take only a few minutes but now when i convert to dvd files do the same as before it takes nearly 4 to 5 hours to render ,am i missing a codec or summit anyone have this problem before and what sholud i do please