How do I play a presention in Impress, add narration and save it to video?

I need to go through a presentation and add narration to each slide or part thereof, include some circles and arrows, and save the whole thing to a video format. So far I can record the entire presentation sound using FlashBack, but it only stays on the first slide even though I showed every slide when I recorded. Is there an easier way to get it with the sound, slide transitions, mark-ups, all together as a video?