i know ) i would advise to you the tool i use.it`s a program of a really high quality and has a lot of features for making video from your ppt.actually it can instantly create AVI, ASF, WMV, MPEG, VOB and MP4 video files from your presentations,also it supports mp4 video and most popular video and audio codecs. moreover, you can control the process of converting. it`s Presentation to video converter (find it with google) )
