Question Regarding Audio in MPEG-2 Compression

Hi,
I have recently been on holiday and wish to compress some stock footage which is taking up ridiculous amounts of space on my Mac. Not only will it be saving me precious HDD space, but I wish to put it on DVD at a later date too and know that MPEG 2 is the standard for SD DVDs.
My problem is with the audio when compressing for MPEG-2. I Understand that both have to be compressed separately so I'm converting the video with a dolby soundtrack, but how do I join them again?
Alternatively, theres the option of checking a box so the audio is multiplexed however the end result always seems to be a file thats unreadable by all applications on my Mac (All software is up to date and I own the entire FCP studio)?
It's a slightly 'Noobish' question I guess, and I'm thinking I'm in the wrong section altogether now oops and maybe I should be looking up how to use DVD Studio Pro?
But any help/ Guidance would be great for an amateur like myself who's just starting out with trying to get his head around the Pro Suites.
Thanks in Advance.

Hi:
My problem is with the audio when compressing for MPEG-2. I Understand that both have to be compressed separately so I'm converting the video with a dolby soundtrack, but how do I join them again?
You don't need to join them again ! You must import both audio and video files in DVDSP and place them in the same track.
You must choose the right DVD enoding preset depending on your footage lenght in minutes and encode your video as MPEG2 and your audio to Dolby 2 (AC3). Giving both files same name (i.e. movie1.mpg & movie1.ac3) will help you to organize your assets in DVDSP.
Visit the DVDSP forum and use the Search feature. You'll find a lot of good info in previous posts.
Hope that helps !
  Alberto

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