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24fps pre-comp in 30fps
Need to change the framerate for output of a comp with many pre-comps in it. 30fps instead of 24fps. Just wondering how AE handles framerate mismatches. – but since it’s not actual frames like video at play here, does it even matter?
if I have to go to all the pre-comps to change them as well or can I leave them at 24fps. Will there be any quality difference if I have non-matching comps in there?
Thanks!
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6 Replies
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all the keyframed/animated changes should be recalculated and the new comp’s frame rate, so no worries there…
if you have and 24p footage (shot or rendered), you will get a duplicate frames in that footage unless you use a plugin like timewarp to interpolate the in-between-frames.
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
Yup. No worries on the TV scan freq. This comp is going to a 60Hz computer screen for digi display.
thnx. Pulldown at render is good.
I’m not talking about pre-rendering comps at 24fps and then placing them in a 30fps comp. Just nested comps. So I guess the real question is this: In the render process, does AE actually pre-compile pre-comps to frames before interacting them with the main comp ? IF that’s the case it would then have to do a frame blend/pulldown when they mis-match for sure. Anyone out there know the mechanism for AE’s compiling?
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Ah. I’ve been guessing so. ‘Cause I have not seen visible frame dupes in the renders with just the modified fps for main comp.
Running mismatched video frame elements vs just animated elements would be a different story. But then only to the mismatch of the video with the main comp’s framerate, correct?
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[Francois Driessen] “Running mismatched video frame elements vs just animated elements would be a different story. But then only to the mismatch of the video with the main comp’s framerate, correct?”
if i’m following you correctly… yes, mismatched frame rates of footage elements would be only be affected, any key framed animations would get recalculated to the new frame rate.
and just to note… you can set a comp to keep it’s frame rate when nested in another comp if you so desired. the setting is in the comp settings, advanced tab….
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
Makes sense.
Thnx, Good to know. -
I deal with some 24p video shot on my Panny DVX-100B often in AE, and I have always just right-clicked on the video in the Projects area, selected “Interpret Footage”, “Main…”, and “Guess 3:2 pulldown” before I begin working. This always seems to have worked for me. I don’t use the “24pa” button, as this is the advanced 24p, which I do not shoot in. Does this have anything to do with what you are talking about? [I got sorta lost in your discussion].
Regards,
Ed
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