From Skuld Software:
Skuld PowerPoint to Video is a powerful PowerPoint to video tool and can help you convert your PowerPoint presentations (PPT) into AVI, MPEG videos easily. Auto mode helps you finish converting automatically, and manual mode enables you control slide transition time of per slide at your will. Pause/resume functions in manual capture mode allow you rest for a while during a long converting procedure. It also allows you dub videos in different audio sources, and can synchronize video and audio automatically.