The audio on my xvid avi file is mpeg layer 3...might sound like a daft question (i'm very new to this) but is this the same as ac3? I need to be sure before I start converting the audio... Thanks
No they aren't the same. mpeg layer 3 = mp3 http://www.afterdawn.com/glossary/terms/dolby_digital.cfm http://www.afterdawn.com/glossary/terms/mp3.cfm