http://www.dvddemystified.com/dvdfaq.html#1.19 DVDs aren’t the pure source I had imagined them to be: because movies are displayed at 24 frames per second (24Hz) and the PAL TV format is 50Hz, PAL DVDs play 4% faster than they did in the cinema. (The sound is usually about a semitone higher too.) The NTSC format (North America) is 60Hz: the process of turning 24 images into 60 results in some judder and blurring. I suppose this must apply to movies shown on TV too.
(Strictly speaking the DVD’s region has nothing to do with this: it just so happens that Region 4 DVDs are PAL-encoded because the TVs in that region are.) 14:00
