Good question. It bugs the shit out of me. Even Criterion does it.
11-08-11, 04:15 PM
I've never been particularly clear on the whole process, perhaps it's cheaper? Maybe they use a different software for encoding? Maybe it takes up less data space on the disc?
11-11-11, 08:26 AM
When source material is mixed, like when they mix film at 24fps+video at 30fps, or 25 for PAL, or even 60 fps footage etc together, they can't switch from progressive to interlace and back, so they encode it all at 1 rate, like 30fps NTSC for the featurette. That's 1 reason.