Roxio now owns Sonic and my experience is mostly with MyDVD software... but
An entry level DVD version of MyDVD that comes with a computer (like v4.5
with my first burner) is limited to 60 minutes of content.
My version of MyDVD 6 says it can put up to 3 hours of content on a disc,
doing so by using higher levels of MPEG-2 compression, similar to Movie
Maker using higher compression to made a movie file smaller. It has an
option for 4 levels of quality (HQ, SP, LP and EP like VCR recorders). But
on some versions of MyDVD, when you try to use this option you get a
marketing message saying you need a higher version of the software.
The why is to get you started, but to sell you a higher version if you want
to use more features than the basic...