Originally posted by WinterMute
Two ways:
Open them in DVD Studio Pro, you'll need to demux the audio first though, and upsample to 48K, thats the hard way.
The easy way is to export the streams from Quicktime as DV stream files, throw them into iDVD 3 (which will re-encode them to mpeg2😡 ) and burn the DVD from there, you won't need to demux the audio, but make sure you export the audio as 48k in the muxed file.
Hope that helps.