You can try E.M.PowerPointVideo Converter, meet all your needs. It
can quickly convertsPowerPointto video, audio and images, such as
avi, flv, 3gp, swf, mkv, mpeg2 ts, DVD, mp4, mov, mp3...
Source(s):
http://www.effectmatrix.com/PowerPoint-Video-Converter/index.htm
Also, you can google some other software。