Motion Tracking

[ToddSanderson]

I'd like other AE artists opinions on a particular composition I'm working on. I have a 25 second video clip in which the camera dollies slowly toward a person who is speaking to camera. The camera also begins out of focus and rolls to full focus at around 6 seconds into the move. I need to animate a piece of paper which is intended to appear scotch taped to the TV screen. This graphic is finished, fully transparent and ready to be used. So I only have those two elements. A 25 second shot and the scotch taped paper. The idea is that as the camera moves in and focuses, we pass by the paper and it defocuses, finally going away completely as we pass it by. Obviously I'd like it to look as fluid as possible. I took some good stabs at it today, but without interjecting my methodology, I'd like to know how you'd approach this request. Feel free to ask clarifying questions. Thanks. Todd.

 

[Whatsup2]

Create a new layer in your AFX composition over the video layer.
Create a seperate pre-composite animation with the Paper in position (blurred then in focus)
hold scene for desired time , then animate out of scene with camera move @ the speed of the camera move.

good luck
~R

 

[hetzen]

I'd also add, that depth of field settings on a camera zooming into the paper will give very desireable results, especially if the paper is set at a slight x rotation of say 5-10 degrees, simulating it being slightly raised off the screen, like a sticky note.

The trick will be matching the dolly movement. You could use the tracking facility within AFX to adjust the x/y position of the paper, but you'll have to fudge the z movement, as AFX doesn't facilitate that.

If you're zooming through the paper, a slight disolve on the paper as the camera flies through, will soften the transition.