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Jerky video from 60fps footage on lower framerate timeline

PostPosted: Wed Apr 14, 2021 1:11 pm
by Ennn74
Hi everybody,
I am quite new to Resolve and editing in general and i’m having troubles and a lot of confusion about frame rates.
I’m editing on Davinci 17 a footage, shot with a reflex camera at 59,94 fps, shutter speed 1/120.
When i play it on pc video player, it looks perfectly smooth.
When i drop this 59.94 fps footage on 59.94 fps timeline the video is perfectly smooth, as it should be.
Even if i change the video frame rate (in the clip attribute window) to 24, 29.97 or 30 fps, i still have a smooth slow motion video.
BUT.. when i drop the 59.94 fps footage on a 29.97 timeline (or even 23.976, 24, 25, 30 fps, no matter which), without matching timeline frame rate to the clip frame rate, the video looks very jerky, not smooth at all, as there were “not enough” frames (at least this is what it looks to me).
The same happens if i change the video frame rate in the clip attribute window to 24, 29.97, 30 fps, on the 29.97 time line, i get a slow motion a little bit smoother, due to the lower speed, but still jerky.
It’s not just a playback issue (i use proxies and optimized media and the problem remains) and jerkiness remains also in rendered output file (Format: Mp4, codec: H.264, Encoder: Native).
I also messed around with settings, selecting optical flaw in frame interpolation section in project setting (as i read in some topic), but nothing changed.
What am i doing wrong? In every tutorial i watched it seemed common to put higher frame rate clip on a lower frame rate timeline and nobody mentioned loss of quality or jerkiness after doing it.
Is there any other setting i am missing?? How to get smooth video (also at normal velocity, not just slow motion) from 59.94 fps footage on a lower framerate timeline??
Any help would be greatly appreciated!