How to extract the original mpeg2 files from mini DVD lossle

[ktoey]

I am thinking of buying the Mediostrean NeoDVD that convert DV through firewire to DVD format directly. This program does not give mpeg2 files as an output, instead it writes DVD images. The other program from the same company (CamPeg RT) does mpeg2 output only and cost $250 vs $99 for NeoDVD.
The reason for wanting the mpeg2 back is for possible re-authoring the DVD at a later time.

My question is: is it possible to extract the mpeg2 files from DVD images losslessly ?. I have read the tutorial in vcdhelp.com that involves using DVD2AVI then Tempgenc.
I assume that this is a lossy process even if the output template is set to DVD mpeg2 type.
Can mpeg2 be recovered by merely stripping header infos from the DVD image ?.

Thanks in advance.

[AntnyMD]

If you do not plan to immediately author an actual DVD, just go ahead and author your miniDVD. In future when you want to transfer your material from miniDVD to actual DVD, just rip the miniDVD the same way you would an actual DVD. Since these miniDVDs are not copy-protected, you can also just copy/paste the vob file(s) containing the MPEG-2 program stream you want, demux/remux if necessary, then re-author to DVD.

[ktoey]

By re-authoring, I mean re-arranging pay sequences/chapters or adding more chapters etc.
I assume that this can be only be done if I have the mpeg files.
Thanks.

[AntnyMD]

You do have the MPEG files. They're inside the .vob file. Open the .vob file in a demultiplexor like the one in TMPGEnc tools section and separate your audio and video streams out.