I'm working on one of my first compositing projects where I'm adding some Green Screen footage to a background plate of a cityscape. When the photographer shot the Green Screen footage he panned the camera up and down a bit so one of the challenges is matching the position of the background plate with the camera movement.
I found the 2D tracker and successfully got it to track the motion of the Green Screen footage. The problem I have is that when I apply this to the background plate it moves the background way out of position and when I try to reposition it back to where it belongs it messes up the motion path from the tracking.
How can I re-position the background plate after applying the motion path from the tracking so the background is properly aligned?
Re: 2D tracking by Dave LaRonde on Mar 8, 2011 at 11:30:07 pm
Add a 2D Null object to the comp. Re-track the shot, then apply the tracking to the null. Move the timeline cursor to the point in the comp where foreground & background are in their proper positions, and parent the background to the null.
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