Mocha Tracking on a Stabilised Layer

Hoping someone might be able to shed some light on this as I’ve never quite worked it out. Is it possible to mocha track a shape when viewing through a stabilized layer? I’ve never been able to do it without the shape going a bit haywire.

I often apply a 4 point track (imported from Nuke) and apply to that a layer and view that stabilized to do roto on. (Generally this iscamera track data to stabilize the plate at a given depth)

Then I would like to be able to create another layer, draw a shape and then mocha track something that is moving independently from the camera within the stabilized view. Then when I turn off stabilized view the shape is good, tracked with both my original point tracks and then the mocha track on top and then any manual keyframes can be made.

Is this workflow possible in Silhouette or is there a specific layer hierarchy needed at all I’ve never realised?

Thanks guys.

Inside of your stabilized layer, create another layer and inside it, create the shape you want to use to drive the Mocha tracker. Your layers and shape should look like this:

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Hi Marco, just coming back to this post.

Correct me if I am doing something completely wrong here but I have always tried to do that exact layer hierarchy but when setting the viewer to the stabilized layer and then attempting to mocha track the layer inside it, the shape always goes haywire for me and does not stick to the plate at all.
Katie’s FXPHD “Introduction to Roto & Silhouette” lesson 5 course also touched upon this concept however she used point trackers and applied them to the layer inside of the stabilized layer. I tried this which worked quite nicely but when Mocha tracking it doesn’t seem to work in the same way?

What I did find however is if I view the stabilised layer and then mocha track a layer which lives outside of this stabilised layer that tracked nicely. But my question is then, is the mocha tracker being assisted at all from the stabilisation track in that case or is just in the viewer for my benefit?


@joshbarham With the footage I am using, I can use Mocha for the stabilize and another Mocha layer for the additional track.

In your example below, the stabilize has no effect on the Mocha layer outside of the stablilize layer.

I am not sure if this will matter, but when you stabilize, make sure you don’t choose Active Layer. Select the actual named layer instead.

I can do a remote session on my machine and show you with my footage if that would be helpful.