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CCoug83
5th April 2005, 19:55
I never noticed this until recently, but all the DVD's I backup have a frame rate of almost 30 fps while all me encodes from AutoGK apparently only have 23fps. Is this how it is supposed to work?
Guest
5th April 2005, 20:00
For movies, the real frame rate is ~24 fps. But NTSC DVDs have to be ~30 to play on TVs. So they use a trick called flagging (telecining) to change the 24 to 30. When you make an AVI, it plays on your PC, so you don't need the trick and you can return it to its original ~24fps.

That's the executive summary. :)
jggimi
5th April 2005, 21:32
Deja Vu (http://forum.doom9.org/showthread.php?s=&postid=634631#post634631) from last night.
CCoug83
5th April 2005, 23:59
I thought this was only done on TV sources, hence the reason to force a normal IVTC on many of them to remove those frames. Movies I thought didn'thave these extra frames.
jggimi
6th April 2005, 00:54
Glad we could clear up your confusion.
Guest
6th April 2005, 04:43
Originally posted by CCoug83
I thought this was only done on TV sources, hence the reason to force a normal IVTC on many of them to remove those frames. Movies I thought didn'thave these extra frames. Let's be technically precise. There are extra fields, not extra frames.
manono
7th April 2005, 18:02
Movies I thought didn't have these extra frames.

Movies (as played in a movie theater) don't. DVD output (of movies to a TV screen) does (have redundant fields added to conform to NTSC television requirements).