Here's another very dumb question - I specialize in 'em, actually :-)

Bought some DVDs on Trademe coupla days ago then started to wonder: How to tell if a DVD is a pirated copy?  Now, I don't mean some scratchy, grainy mess that's been taken with a hand-held camera in a Karachi movie theatre.  I'm talking about a highly professional copy with multi-channel sound and maybe even disc and label holograms.

I found heaps of tips online, ranging from  the silly ('very cheap price') to the sensible ('if you can you smudge the disc label with a damp finger, it's not screen-printed).  But there was  little of a definitive nature.

Then I thought: Why not try a media identifier, like DVDInfo Pro?  So I did this and it seemed to give me a clear result.  Under 'Media code/Manufacturer ID' it said; 'N/A Pressed DVD'.

Which I took to mean that the disc had been stamped from a glass master, as I'd expect from a commercial product.

My question (finally): Is this an acid test for DVD movies?  Would the 'Pressed DVD' notation be 100% reliable when trying to spot a fake?