Ok, I suspect the issue is that the MCI player (used by PowerPoint) is
having a tough time decoding the media file and is eating CPU resources.
You could use an application like GSpot (do a Google on the name) to
determine what codec is being used and if it's installed properly on your
machine. The other issue is that it may have a very high bit rate and that
is causing the poor performance you are seeing. If that is the case you'll
need to re-encode it to something your machine and PowerPoint can handle.
Or,,, you could look at the add in we created to solve issues such as these.
You can download a free trial version (fully functional) of it from
www.pfcmedia.com and see if it doesn't solve all the issues. (I fully
believe it will.)
Austin Myers
MS PowerPoint MVP Team
Solutions to Multimedia in PowerPoint
www.pfcmedia.com