I'm almost a newbie, so please forgive me if this is a silly question or if I don't use the exact terms.

This is the question:

I have an MPEG2 video file.

If I use it to burn a SVCD adding no chapters and then I rip off the mpeg video file I get exactly the same file (binary compare).

If I burn a SVCD adding chapters and then I rip off the mpeg video file I don't get exactly the same file (although it has the same size).

I believed that I should have get exactly the original mpeg files, no matters if I added chapters or not.

Where did I go wrong?

(I have used VCDGear)

Thank you very much for your attention.

All the best.
Stefano