audio+video stream size smaller than dvd vob size?

[Greystoke]

I have a 3.83 GB DVD.

In DVD Decrypter, I demultiplex the video and audio streams, and their sizes are 3.76 GB (added up, of course).
The same thing happens when I demultiplex VOBs in DVD Lab.

Is this OK? The streams aren't somehow reencoded or something?

I think the same thing is with the other DVDs, though I've never compared the sizes before. I just assumed they were the same.

[clovnul]

Maybe your DVD has menus.

[Greystoke]

it is SA dvd.

[clovnul]

SA means stand'alone? Don't stand'alone DVD recorders make some menus?

[Greystoke]

yeah, they make a very simple menu, but I don't think it's 70 MB big?

what I'm saying is that when I compare the sizes of VOB files themselves (without the ifo, bup etc) they're different.

[clovnul]

I have DVDs that have the menu on the first vob (VTS_01_1.VOB).

[Greystoke]

OK, I authored a dvd a week or two ago and now I ripped the SA dvd and the one I authored. Ripped the in IFO mode and both video streams have the same size.

Everything's cool.