Polygon mask problem

Hello, I am masking out an area on a road and I am moving so the scene is moving. I am in fusion and going frame by frame masking out the road. When I get 4-5 frames done and look back my first couple have moved. I have 20 frames done and now the first have moved enough that I have to redo it and it screws up the rest. 10 frames in and the curve I had done is straight? Why is that? At the bottom in the inspector, I have a keyframe noted. Thanks.

Are you seeing keyframes (short white lines) on the Fusion timeline marker? Each time you move a keyframe, it should automatically add one. From what you describe, it sounds like you're not making keyframes.

Also, is there a reason you're doing it that way? Typically it's best to keyframe the first frame, keyframe the last frame then keyframe right in the middle. If you need to, then put keyframes in the middle of each of those middles. Then if needed in the middle of those middle middles. Basically put keyframes in the middle of each segment until you don't need any more. Resolve will interpolate the movement between each frame.

Or if you really need each and every frame keyframed, it's a much better workflow to just use trackers. Your choice though.

Oh, also, if your curve is straightening out, it's because you have a rogue keyframe in there. Use the little arrows on each side of the red keyframe dot to cycle through keyframes and delete the one that is causing your curve to go haywire.