Glowers Productions wrote:
A stay behind my running person
B Blow up in the right place, so i have it in the first phrame positioned on a car but as the camera moves it moves too, any help? ive heard about this motion tracking but do not understand how it helps?
Motion Tracking is a computer process that attempts to locate a point (or points) in your footage as it moves from frame to frame. You then attach your other element (the explosion) to the tracking point, making the explosion move in tandem with the object on your footage. Read about it's uses, and how to do it, in the Help Files.
This tutorial shows you how to compose Action Essentials elements if you have a moving camera:
Also, the videocopilot themselves have a tutorial that might help you:
As Andrew says, you need to rotoscope the guy, i.e. draw a mask around him to get the explosion behind him.
If you want to use tracking, to assist you with the rotoscoping, the following tutorials might help: