I already tried to post this on the official handbrake forum but they would not let me. i wanted to convert a 5.5gb mkv video file which is 720p for my iPad. when i put it in handbrake i select the apple tv preset and the only settings i change are in the pictures settings (i changed the resolution to match the sources which is 1280x780) when i hit start it said that it would take 12 hours. is this normal or have i selected the wrong settings. also for files which are 1.4gb 720p mkv it takes 3 hours. i have an imac 10.5.8.