perspective corner pin -> 3D Data :HELP :

[David Bogie]

[ted harisson] “I am trying to extract the 3D data of a shot I made.
I shot a window of a house, and I want to replace the inside of the house (seen from the window) with my own footage.
Thing is, I need to know where the inside of the house layer should be positioned in order to make the look reliable. “

There is no 3D data in a video shot and Corner Pin is a 2d distortion effect, it has no z component. Unless you’re using tracking pins but that’s another topic.

You’re just going to cut a hole in your wide shot (level of precision up to you) and put a layer behind it in 2D. How you adjust the perspective on the interior shot or movie ti around is up to you. Best to shoot it with the exterior’s camera location in mind.

You haven’t said anything about your exterior’s other values. If the camera is hand held or moving, you’re off to another project that has little to do with this post.

bogiesan

[Ted Harisson]

Hey,
Thanks for replying. The camera is handheld.
What I was trying to get to, is whether this could be accomplished within AE alone.
OR Could it ? (hint: Aharon Rabinowitz (?) :))

Thanks !

[Andrew Bardusk]

Depending on how crazy you went with the handheld, you might be able to do a static(non animated) corner pin to give it the right perspective. And a simple 2 point Position and rotation track might just do the job.

If you need to animate the perspective, then I would still do the best position and rotation maybe even scale track that I could, and then hand animate the corner pin, to match the perspective.

That’s what I’d suggest right now without seeing your footage.

That being said, maybe boujou would work straight of the bat and be less painful. If you already have it, why not give it a shot?