i am not sure... but still i will open my mouth... ahhh, i think this AC3 thing has to do with sound.... as sometimes in converted files to DVD format, i get this error by the media players asking if i want to chose certain options for the AC3 filter and i just cancel it cause i don't know what the heck it is... so I am supposing that your file will be playing on any DVD players but wont be giving sound as that player dont have the AC3 filter... right....
oh well, nevermind ....
