Blackmagic Forum

Hi Guys,

It's been awhile since I used Fusion. I have a shot were I need to roto out a few buildings. It's a long helicopter track, but I was wondering if there is a way to set keyframes for the point I'm trying to track. These tracking points will be used to stablize the track when I roto. The track area has a lot of perspective shift as the helicopter is circling around the area of interest. If there was a way to interpolate between the keyframes it would make life easy. If they don't have this option, what will be the best way to handle this in Fusion? Thanks.

Tracker will do what you need. It will track the points and provide the stabilize/destabilize transforms.

Yes, I understand that, but because there a lot of perspective shape change, the tracker will drift. In Nuke, I'm able to set keyframes to evaluate from 1 shape to the next. Can Fusion do something similar, or if not, how do you deal with changing shapes that throws off the tracker.

you can't do that in Fusion but you can change your pattern every couple of frames. It's enough if you change it's size a tiny bit for the tracker to register the new pattern without changing position.

That being said, using a 3d track (for example from syntheyes) might be a good way to get perfect points to stick your rotos to in such a shot.

Thanks for the reply, will try the syntheyes approach.