Kalleheikki Kannisto
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COW Coin
Forum Replies Created
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All of your background shots are time lapse footage. That in itself doesn’t look “realistic,” for the motion has been sped up significantly. Or do you want the flying carpet to appear like it was part of the time lapse? If so, it will fly by rapidly like the cars in the clips.
For realism, I’d say you first need regular speed, non-time lapse footage.
As for the rotoscoping, the less stuff there is in the background the better off you are. The shots with plain blue sky backgound are the easiest to extract the flying carpet from. The ones where the carpet is in front of land will have to be done much more manually and will take much longer. The last close-up shot with the hair flying around is probably the biggest challenge.
A third issue is that the flying carpet shots go in and out of focus, so either the backgrounds need to do the same at those spots or they need to be edited so that doesn’t happen. Also, some of the carpet shots have to be tracked and stabilized, with this amount of rapid shake it is going to cause some frames to appear blurry. Which means that either this has to be cut so it doesn’t happen — or the backgrounds need to be “reverse tracked” so that the same camera shake happens in the whole shot, which is the more realistic-looking option.
Other than that, a VFX artist should be able to make the images look like they belong.
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Could be something unreleted to AE as well. Did you try restarting the computer?
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If the foreground objects are relative simple objects, you can duplicate the layer, mask off all the elements you want to go in front and animate the masks. (If the camera is moving, you may want to combine this with tracking the motion, but that is a more involved matter I won’t be able to cover in a few words.)
With more complex objects the masking can be done with the roto brush tool.
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I can’t get it not to work. To me that looks like a bug. Which version of AE are you on?
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Not sure I follow what the desired animation is. A route like this?
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Thanks Dan! That’s good news. Will have to give it a try then.
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What property are you applying it to when this happens?
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Dan,
Is it possible to write a script that takes a set of animated null positions over time (each frame) and creates an animated mask from them? Or do the mask points become inaccessible the moment you create the mask, so you can’t modify them in the next frame?
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Yes, that “in-between color” pixel is normal sub-pixel sampling. That is how most pixel-based imaging programs deal with edges that don’t align perfectly to a specific pixel edge, they blend the values in an attempt to produce a smoother output. It is the same as you see in the outlines of the text, just on a vertical edge that is not aligned to a specific pixel.
Essentially you will have to make sure that the edges are mathematically exact to get rid of that effect.
A potentially useful resource for you:
https://chrissilich.com/blog/after-effects-expression-snapping-objects-to-whole-pixels/
You will still have to make the solids an even number of pixels wide and tall for this to work on every edge.
