Greetings, I have been trying and researching this for a couple of days now, without any success... Let's see: I have ripped some of my DVDs to full resolution AVI files with 2 audio tracks (spanish and english language tracks). In QuickTime Pro, one of the tracks is activated by default when playing, but if you click cmd-J, you can see the other track and enable/disable any of the two. Now, what I want to do is have another video file optimized for the iPhone, but I'd like it to contain multiple audio tracks. The other step woulb de embedding subtitles with Muxo, but that's another story, I still have to be able to generate an MPEG-4 H.264 file from QuickTime Pro that keeps both audio tracks/streams. I have tried exporting for the iPhone, and also exporting to MPEG-4 but I see no option that will allow for for audio tracks to be exported to the new file. I also tried doing it with VisualHub, but it seems to be doing the same: it only keeps the default audio track and discards the other. Is this even possible? I'm assuming it must be, otherwise I wouldn't have those files with multiple audio tracks in the first place. Thanks in advance, Ángel.