Conflicting Information on 24 and 23.97

Daniel J

Daniel J

Well-known member
According to adam wilt:
“...24p is a bit more complex. Of course, it's really 23.976p...”


If 24p is the same as 23.976p according to Adam then why are their two different sequence presets in FCP? I can have a:

NTSC 48kHz at 23.97
or a
NTSC 48kHz at 24

This seems to be the same difference from 29.97 and 30p.

Correct me if I am wrong, but if NTSC 48kHz at 24 is literally 24 progressive frames a second, then any work that will end up in NTSC should be at 23.97 or 29.97? Am I missing something?
 
To put it another way:

Their is no genuine 24 frames per second on a dvx, only 23.97

Their is both 24 frames and 23.97 frames per second in FCP.

Is that right?
 
Last edited:
Pure 24 fps is possible in a computer where there is no broadcast standard to sync to.

Cameras must shoot at 23.976 to create a signal capable of functioning with 29.97 broadcast video.

In short, unless you are creating pure animations from scratch for the web, always use 23.976 as your timebase, not 24.

Noah
 
Some cameras (like the VariCam and the F900) can shoot at a true 24.000 fps. Most video cameras don't. NTSC-compatible video runs 0.1% slower, so DVX/HVX/HD100/XHA1/V1U/HV20 etc. "24P" = 23.976 fps.

24.000 is used primarily when the output will be transferred to film.

23.976 is used whenever the end product is destined to be shown on video.
 
You must log in or register to reply here.
Back
Top