I've been using handbrake for about a year or two now. I'm no expert, but I know my way around enough. I'm using a Mac mini 2,1 which is a 1.83 GHz Intel Core 2 Duo and a MacBook 5,1 which is a 2.00 GHz Intel Core 2 Duo. The MacBook has been mine for about a year and a half, and the Mac mini about 2-3 months. Both are saving to the desktop on the main boot drive. The Mac mini still has the original HDD, while the MacBook has been upgraded to a 1TB western digital HDD. In the past, the MacBook would average around 20 fps, which is what the Mac mini is averaging now. The MacBook recently however, has dropped to about 15 fps, adding another 45 minutes to an hour of encode time. Basically what I'm getting at here is there any reason why the fps would drop, and anyway to fix it. PS: Both are using the standard Apple TV 3 Preset.