30 in 29.97

robwood wrote on 12/7/2009, 12:12 PM

BACKGROUND
i'm adding 30fps footage to a 29.97 timeline. the goal is to preserve the quality of the frame; extra frames is not a concern.

SETUP
so i select Disable Resample to avoid frame-blending (not sure i need to in this case but anyway)
set the Playback Rate to 0.999 to gear down the frame-rate from 30 to 29.97

QUESTION
do i need to change the Undersample Rate as well? isn't that unnecessary once playback rate's been adjusted?

Comments

Chienworks wrote on 12/7/2009, 2:13 PM

Undersample rate has nothing to do with your objective, so don't mess with it. It's used to obtain stop-motion strobe type effects.

Your setup seems correct. Disabling resampling is a good thing just in case the occasional odd frame doesn't line up.

TheHappyFriar wrote on 12/7/2009, 6:17 PM

shouldn't need to change any FPS at all. 29.97fps footage is footage that's a different timecode then 30fps footage so the sync (color, audio, I forget) match up properly. Just change the event from 30fps to 29.97 & it should be all right (I've done it quite a bit)

Chienworks wrote on 12/7/2009, 6:43 PM

Are you sure about that? A 30fps clip one minute long physically has 1800 frames. A one minute 29.97 clip has about 1798 frames. There is a real difference in frame count between the two.