ADOBE AFTER EFFECTS: Forum Expressions Tutorials Creative Cloud

Simulated rotation

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
Christopher Chuang
Simulated rotation
on Oct 15, 2010 at 5:17:25 pm

Hey guys,

I'm trying to simulate an item rotating from photographs. I have photos of it every 15 degrees. Is there a way to generate a smooth rotation? I've been using the re:flex morph tutorial, but it's kind of a sloppy cheat. If I can't do it in After Effects, could someone recommend a 3D program that would work?

Thanks!
Chris


Return to posts index

Dave LaRonde
Re: Simulated rotation
on Oct 15, 2010 at 5:30:31 pm

[Christopher Chuang] "I'm trying to simulate an item rotating from photographs. I have photos of it every 15 degrees. Is there a way to generate a smooth rotation? "

It sounds as if you might have gone about this backwards. Consider this: You could shoot the object as it rotates in video (I suggest progressive scan), and then create still frames at the appropriate points in the rotation.

Voila! Photographs!

Believe me, this way is infinitely easier and faster than the way you propose. It also has the virtue of a far shorter learning curve.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


Return to posts index

Chris Wright
Re: Simulated rotation
on Oct 15, 2010 at 6:38:53 pm

isn't this the reverse of how they did the matrix effects? They used interpolation software. I don't know if this will work, but this technique works for jumpy pans, tilts, dollies.

1.Put 29.97i video in new 59.94 "start" comp so that timewarp can access both fields.

2. add effect->time->timewarp speed at 50%,

3. make new "output" comp 99 fps and drop "start" comp inside it with timestretch 50%

4. output "output" comp with same fps. It will maintain the same fps but will smooth out any jerky movements.

http://technicolorsoftware.hostzi.com/


Return to posts index


Christopher Chuang
Re: Simulated rotation
on Oct 22, 2010 at 2:12:03 am

Well, I'm starting out with still images. I work for a photographer, so we only have stills, no video footage. We have the product at every 15 degrees in a rotation. Right now when I assemble it (each layer/shot gets a frame), it looks like stop motion. Is there any way to simulate frame blending between stills?

Thanks!


Return to posts index

Chris Wright
Re: Simulated rotation
on Oct 22, 2010 at 3:23:38 am

here's a project already setup that will smooth stop motion, pans, tilts, dollies. you have to have timewarp and output timestretch same number so its same duration. leave it at 18% or go 50% with frame blending for more frame blended look.

it's setup for 29.97 but you can timestrech/tweak final output. what have you got to lose?

ae cs3 aep
http://www.mediafire.com/?ldjj4nwobczm988

http://technicolorsoftware.hostzi.com/


Return to posts index

Christopher Chuang
Re: Simulated rotation
on Oct 22, 2010 at 3:41:38 am

Thanks for this project file! Is there any way to download the POV Rock Rolling footage, or should I just plug in my own footage. I'm not exactly sure what you're using here... Motion Sketch, Smoother, and Wiggler?


Return to posts index


Chris Wright
Re: Simulated rotation
on Oct 22, 2010 at 6:01:26 am

rename your files so they are sequential. eg. file.001 file.002 file .003
then import into AE as an image sequence. it's using timewarp because it's free and comes with AE, unlike revision's twixtor which works waaay better.

if you have get artifacts, you can click create from one image. or mess with the error threshold and smoothing iterations. twixtor pro(which isn't included, has a warping guide you can create).
download the twixtor demo and compare.

http://technicolorsoftware.hostzi.com/


Return to posts index

Chris Wright
Re: Simulated rotation
on Oct 22, 2010 at 3:47:26 am

oops, wrong one.
here's the right one.

and make sure you import your image sequence at 18fps. you can timestrech the final output to get the length you want.
http://www.mediafire.com/?k6tp6lxk19c417h

Revision's twixtor works really good. I just tested it.
timewarp wasn't specifically designed for fps changing, unfortunately.


http://technicolorsoftware.hostzi.com/


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]