Okay, I ran the "silent" DVD content through MPEG Streamclip and demuxed to m2v and AIFF. I dragged the video file into Toast and was not prompted for the audio, nor does it seem to have automatically included it as this DVD is "silent" too! The audio now says "PCM Stereo, 48000 HZ, 16 bit." Any thoughts? Also, I have quite a few files to burn and it would be a shame to have to burn a DVD each time just to demux it and burn another - any other thoughts on how to do this?
PS - The MPEG-1 files came from EyeTV USB, which can only produce those I think.