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[spoliquin]

Hi,

I am shooting a time-warping, slow motion, "matrix bullet time" (or whatever you want to call it) sequence using twenty cameras positioned stationary in a semicircle around a subject. The frames from each of these cameras will be combined to make a smooth rotating shot around the subject at a single frozen moment in time. To make the motion as smooth as possible, I plan on interpolating frames using Twixtor, unless I can find a better option. I don't know much about 3D motion tracking besides the basic concept behind it, so this may not be what I am looking for at all; but would SynthEyes's motion tracking technology combined with another vfx program allow me to create a better slow motion effect for the sequence I am shooting? Could motion tracking possibly be more helpful in mapping out my subject and its background, and then generating extra frames to smooth the motion?

Thanks a lot

[GraphicsKid]

Syntheyes won't generate the extra frames for you. Use Twixtor for this.

I'm not sure what you are talking about with "mapping the background".

[LFGabel]

Couldn't you just solve for the individual untouched frames, apply Twixtor to your plates, and stretch the timeline and keys in your 3d app to match the length? Then comp?

I would think trying to track Twixtor-ized frames might lead to unpredictable results.

[rtep]

SynthEyes alone will not reallly help you...

But you need to see the bigger picture! Could the 3D solve I obtain using SynthEyes help me with that? But that's far too complicated, and you mentioned you know just the basic principles behind this...

Anyway, go running somewhere with lot of trees and the fresh air will help your brain bringing some ideas and undertsand things!

Back to your shot...
You didn't mention if it's a greenscreen or if it's just a non-effects bullet-time shot (that would be possible to some degree since you said that you're not doing full 360....).

Are all the cameras capturing at the exactly same time, creating a fully frozen effect, or are they delayed a bit, to produce slow-motion/fast-camera effect?

Normally I would say retime the final comp....
But this time, if you're using live-action greenscreen (fg) with CG backround (bg), you should use the advantage of having bg and fg separated to prevent some occlusion artifacts when retiming - there will be lot of parallax since it's an orbiting shot...

So you can try retiming both fg plate and rendered bg separately and then comp them

Or retime only fg plate and, as Lee said, retime the camera track animation to render out smooth bg....

good luck!

Pete