Once the footage is in your non-linear video editing program you have to decide how you want to present it. You can shorten it and edit it into sequences, or you can just create small blasts of un-edited footage. Either way you are going to end up with several different Timelines in your video editing software. Each one of these Timeline's is going to have to be exported and compressed from your video editing software one at a time. Select and option to Export using a compression program. If you are using something like Apple's Final Cut Pro you will have Compressor to compress each of these file's into the proper codec. Any non-linear video editing program with an associated DVD authoring software will have this option, especially Avid Media Composer, Adobe Premiere, or Sony Vegas. Select a compression rate that will fit into the DVD authoring format, which is usually just going to be MPEG-2. You should also make sure to actually set the quality that you will want the video and audio to be. Go ahead and compress the Timeline video into two tracks, one for audio and one for video. Do this for all of your movie sequences or sub-clips that you created in your video editing program. Make sure to label them clearly as there will be several different files.