ptfitzy, perhaps you'd like to clarify exactly what you are doing?
Are you starting with data, or are you trying to burn a dvd-video?
Do you need to convert a video file to dvd-video format before burning to a disk, or do you already have the Video_TS folder containing the .ifo, .bup and .vob files that are always found in dvd-video?
Or perhaps you are trying to copy a commercial dvd that you own? In that case you need to decrypt it, rip it to the hard drive (ripping is the term for moving data from an optical disk to the hard drive), then possibly compress it to fit onto a single layer disk.
So, please explain what you are trying to do.