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Choppy shot when speeding up slider footage
I am shooting a cardboard set using a Canon 7D @ 1920×1080 – 25FPS and a slider on which the camera moves sideways very slow.
The slider moves really slow, using a little electric motor. I sped up the original shot in After Effects 10 times (It was 2 minutes, now it’s 16 seconds long.)
The problem is, when the shot is sped up, the shot gets choppy. Real fast stuttering (See example: https://vimeo.com/37729994)That‘s when it’s in a 25 fps comp or final file.
The thing is, when I set the Composition framerate to 99fps in After Effects, it looks fine, not choppy at all. So it’s not the electric motor. But putting that 99 fps composition in a 25 fps composition doesn’t help either.
I know this could be the “non-realistic” lacking of motion blur but I tried adding CC forced motion blur, I tried using frameblending, I even tried converting the MOV from the camera in MPEGstreamclip to a MotionJPEG encoded file first and then import it into After Effects. All doesn’t work.
Any ideas get the final file less choppy? Any help greatly appreciated!
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1 Reply
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Hi Dave,
Thanks for your advice. The thing is, we also tested it with the slider running at normal speed, so the shot won’t have to be speeded up. But this also gives the same weird choppy unrealistic look.
We also shot at different shutter speeds 1/80 and 1/250. But the only way we get it smooth is playing back the 99fps composition.
Any other ideas?
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