Ok, I want to extract the AC3 stream so I can burn it on a DVD and play it on my player without the video.
Not sure why you'd want to do that. Just turn off the tv. Or, if you want make a copy for heavy use while preserving the original, use a program like DVD Shrink to copy just the movie and the desired audio track to a DVDR. And turn off the TV. I've never done it but IIRC, there needs to be a video stream. You can't just play back an AC3 track alone. Even if it's just black video there still needs to be something there. Something about DVD players are supposed to play video so if there's no video track it won't play the disk. You might want to try to convert it to a DTS track which, assuming it would fit, could be burned to a standard CD (and I'm sure, edited or split). You would need to have a digital out on your CD player (or use your DVD player assuming you have a digital audio connection set up). Don't know how to do it but there are DTS newsgroups where people post their Quad stereo albums in DTS, so it is possible. -paul