Real world units
by Jake Smith on Jan 14, 2011 at 1:39:38 pm
Is there a way to figure out real world units in AE? For instance, 100px = 1ft. I pretty sure there is not, but I wanted to get a second opinion.
For instance, let's say you have a piece of footage and you know your subject is 3 feet from the camera. Now you need to create a camera that would be 3 feet away from from your center point in Z space.
Cinema has the ability to use real world units in v12 so I created the camera in there and imported it. I was getting a number around 90.5px = 1 foot. This is a fine work around, but just curious to see if anyone else had some information on the problem.
Re: Real world units by Dave LaRonde on Jan 14, 2011 at 4:59:59 pm
[Jake Smith]"Is there a way to figure out real world units in AE? For instance, 100px = 1ft."
I've never heard of one.
It sounds like when you build a model in C4D, you can assign real-world dimensions to it. AE doesn't work with models like that; there's no similar method of calibration, and it makes sense. In AE, you can import two pieces of 1920x1080 footage, shot on the same camera, but one is shot 3 feet from the subject and the other is shot 30 feet from the subject. The only thing AE can tell is that they're both 1920x1080.
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Also, the real world distance and the distance as viewed would vary a lot dependent on the field of view of the camera. Different lenses will cause things to appear very different depending on the angle. AE is not a 3d program so again, as Dave said, no.
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