Do all authoring tools have to demux/mux?

[Brent212]

Whenever an authoring tool such as TMPGEnc DVD Author or ULead Movie Factory accepts a .mpg that is bigger than 1 GB, doesn't it have to demux the file, split the streams into smaller pieces, and then remux the appropriate streams to produce the smaller .VOB files? I've read posts where someone has said one of the advantages of TMPGEnc DVD Author is that it doesn't do any multiplexing, but I think they meant that it doesn't do any encoding, right? Doesn't it have to do some sort of multiplexing to create the .VOB's?

[thor300]

Ya, VOBs are multiplexed. Maybe that guy ment that you could add VOBs directly, like for example VOBs multiplexed with ifoedit.