Hi there, I try to combine all them in one, i already have try this way the problem was i only was creating a single file and not one for audio and other for video.So i create 5 chapters in one track, exporting in MPEGIIDVD (.m2v) and Dolby Audio (.ac3).. ty for the tip of using LPCM but with that the video size become too much large.This way building the DVD in Encore only take some minutes since