[Loki Mckay]

If the above people didnt answer your question, and your asking what i think your asking read this: 🙂

If you are just shooting a 2d shot (the chroma keyed footage does not rotate around the object/person)in which the background footage (not the chroma keyed footage) is shaky because of camera movement, you can get the character or object to appear “anchored” to the ground in two ways:

1) Create a null object (Layer>New>Null object)

Pick a spot on the background footage and place one of the corners on it.

Then keyframe the position (and scale/rotation if you want) and go frame by frame and move the corner of the null object onto the background object so they match up.

Once you have done that you have “countered” the camera movement and you are ready to parent your green screen footage to the null object.

2)This way is more complicated :/

Open the motion tracker window

Select your background footage the click track motion

Select position, scale or rotaion depending on what your trying to achieve.

Then click one of the play buttons down the bottom to analyze the footage. The two markers will attempt to follow the pixels on which you placed them on at the beginning.

Most of the time it won’t work and i dont recommend this method.
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Hope this helped!!! =)
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