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Mocha Corner Pin (CS4)
I’d like to use Mocha to track the screen area of a laptop as it opens up so I can composite video into the screen using AE
(I’m using a png sequence of a laptop model rendered out of 3DS Max)
There will obviously be a foreshortening effect of the view of the screen as the laptop hinges open, is this going to present a major problem to Mocha with the track ?
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2 Replies
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As long as the four corners are four distinct points, it should go fine. There might be some jitter at the most oblique angle. Maybe. Hard to know without seeing the footage. For more info, try posting in the Imagineer Systems COW forum.
So rendering only the screen (with new footage) in MAX and compositing it is out of the question?
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There is a way to export geometry of the scene in C4D to be read by an AE plug. This way, you can import the C4D scene info and have, for example, a null tracked to the laptop screen in 3d space with a matching camera. This eliminates the need for tracking and will allow for a much cleaner composite.
Combine this with an export of just the screen object used as a trackmatte, and you have a much better way of compositing this shot.
Good Luck!
–Will
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