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best method for 60i slow motion
Posted by Brian Pitt on November 9, 2007 at 6:45 pmI really haven’t needed to slow down much footage with the projects I normally work on, but I do now.
I know that the speed feature in FCP produces less than desirable results. I need to slow some footage (shot on a DVX100a 60i) down to about 30-40%. I’m on a budget, but I will buy a plug-in if it will give me the results I’m looking for.
should I use AE? I’d rather stay in FCP if I can.
Brian
Ben Scott replied 18 years, 6 months ago 4 Members · 3 Replies -
3 Replies
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Paul Escandon
November 9, 2007 at 7:22 pmI would say use the optical flow retiming in Motion 3 (if you’re working with FCS2).
Send a clip to motion by right clicking on it, then in the inspector tab in motion click the properties tab and click the timing twirly. Set the amount you want to slow it down to and change the frame blending mode to optical flow.
You’ll notice a little status window to the left of the transport controls as it analyzes your image to figure out how to best apply optical flow to create frames. This can take a long time – but it’s well worth it. Keep in mind that this can create huge cache files but once you let it analyze the clip you won’t have to do it again.
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Paul Escandon
Producer | Director | Editor
Apple Certified Trainer – Final Cut Pro
Oremus Productions
http://www.oremusproductions.com
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Adjunct Professor of Media
John Paul the Great Catholic University -
Jeremy Garchow
November 9, 2007 at 8:19 pmHere’s a way to take 60i footage and slow it down to make it slomo 24p. After you have the 24p footage, then you have to add pulldown to it to get it to 60i using something like After Effects. It will take a bit of work, but it might be worth it for you:
https://rarevision.com/v1/articles/slow_motion.php
Or try optical flow in Motion 3 as has been suggested.
Jeremy
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Ben Scott
November 10, 2007 at 12:34 amtwixtor used to be what I used, i suggest reading up marcos tutorial as it makes sense of all this retiming stuff (it gets complex)
this sort of effect likes progressive images and footage shot over certain shutter speeds
you could use compressor to deinterlace
https://library.creativecow.net/articles/solorio_marco/twixtor_review.php
this is from a review and talks about shutter speeds preferred
“Twixtor, however, is going to be used with 24fps or 30fps footage captured with a shutter speed of 1/50 to 1/80 of a second. At these frame rates, fast motion causes blurring, which seems normal when the footage is viewed at normal speed. In fact, it tends to smooth the motion of objects that are moving quickly. When you apply Twixtor to this footage to create synthetic slow motion of 96fps (a 4X speed-up), you get the same amount of blurring as from a 24fps shutter. That’s because Twixtor faithfully replicates each pixel. So while the motion may be nicely slowed down, the blurring causes parts of an image to smear.If you can control the shooting of the footage, one solution is to select a faster shutter speed during acquisition. In a film camera this means closing down the shutter angle. Digital cameras offer even more flexibility, and some support 1/1000 second shutter speeds.”
https://digitalcontentproducer.com/ar/video_revision_reelsmart_twixtor/also watch out when optical flow retiming on some footage with smoke/.abstract backgrounds when changing speed by a lot as this can go very very strange and keep warping in the wrong places
if you are doing a lot of speed work like this you may want to cut out each element with green screen or masking and then the retiming is more intelligent between planes in the picture.
hope this helps
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