Page 1 of How to work out the Runtime Differences between R1 + R2 DVD`s?

I`m wondering what is the correct formula for working out the runtime differences between Region 1 and Region 2 DVD`s?
I`ve heard that a lot of the time, when a R1 disc has a longer runtime it is down to the difference between the PAL and NTSC formats, which often results in a couple of extra minutes per hour on the "no different" R1 copy.........

Is there a rule of thumb here, or have I got it wrong?
Thanks

:)

Notwithstanding any cuts, the rule is that movies for 50Hz PAL systems (e.g. UK), run 4% quicker (57.6 mins per hour) than the same movie for 60 (or 59.97) Hz NTSC systems. You would expect to hear a difference in pitch, but the sound is recorded with its pitch shifted to compensate.

Cheers for that one Neon!
:)

Is that why if I do an NTSC DVD to PAL VCD rip the audio is out of sync?

Maybe - not something I`ve ever tried - or indeed can see the need for! You might as well watch VHS ;)