Jon Fairhurst
February 9th, 2010, 11:20 PM
So... I've figured out how to do motion tracking in After Effects, but I'm having trouble figuring out how to deal with stabilizing to a background that gets occluded at times and in various parts of the screen.
In particular, I'm "gluing" a user interface to a screen in a handheld shot. It's green, so there is action in front of the screen. I can corner pin, but once my reference point is obscured, things go nuts.
One thing that would help is if I could figure out how to erase a group of keyframes. Let's say my track is perfect for two seconds, but a 2;01 it goes haywire. How do I easily delete just those keyframes? If I can do that, then I can use a different set of reference points and go forward, until the next screw up. Eventually I'll get to the end.
Similarly, sometimes a corner goes out of frame. Any ideas for that case?
Thanks in advance!
In particular, I'm "gluing" a user interface to a screen in a handheld shot. It's green, so there is action in front of the screen. I can corner pin, but once my reference point is obscured, things go nuts.
One thing that would help is if I could figure out how to erase a group of keyframes. Let's say my track is perfect for two seconds, but a 2;01 it goes haywire. How do I easily delete just those keyframes? If I can do that, then I can use a different set of reference points and go forward, until the next screw up. Eventually I'll get to the end.
Similarly, sometimes a corner goes out of frame. Any ideas for that case?
Thanks in advance!