Martin Brennand
Forum Replies Created
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The problem is you’re trying to track a pure-white area. Mocha needs texture to track a plane.
Simply expand the size of the shape to cover outside the edge. If you only care about replacing the light you can make the shape quite large.
Are you planning to also paint out the light it’s casting? If so, you may want to track the whole plane.
Martin Brennand | Product Manager | mocha – Imagineer Systems
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Sorry to give the worst kind of subjective answer, but it really depends on the shot:
1. How much light bleed is there when the light is exposed to the camera?
2. Does the light wrap over her shoulder?
3. Is the camera locked or moving?
4. How much does the subject move?If it’s locked, you really just need to roto the subject’s body and paint out the background. If there’s bleed into the foreground however, that will be harder to clean up.
Can you share a few frames of the sequence to outline the issue further?
Martin Brennand | Product Manager | mocha – Imagineer Systems
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It’s potentially doable, but i’d need to see the motion of the face. Is he always face-forward, or does he turn so much the nose obscures one side of the face?
Martin Brennand | Product Manager | mocha – Imagineer Systems
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Keep in mind the AE redraw rate for overlays is poor, so unless you scrub the the timeline really slowly in AE is not going to show you them matching.
An easier way is to link the nulls to a solid so you can see if it is lining up correctly by playing back the clip in AE rather than scrubbing.
In terms of the scale, that’s just how the camera solver works: It scales the null size based on the parallax of the camera. You can just shrink them down universally.
You also probably don’t need that many tracks. More information is always helpful, but if one of those tracks is off, it’s going to throw out the whole solve.
Martin Brennand | Product Manager | mocha – Imagineer Systems
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You might want to look at the BCC Remover plugin to clone offset the acne with mocha PixelChooser masks combined with the BCC Beauty Studio to smooth the rest of the skin.
This video doesn’t cover acne specifically, but it gives you a good idea of how this could be done:
https://www.youtube.com/watch?v=P7JOBha9_gAMartin Brennand | Product Manager | mocha – Imagineer Systems
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Inside the mocha GUI, you use the Layer Properties In/Out range on the left-hand side of the interface (under the layer controls section). Setting the layer in/out range will stop the layer from tracking or being visible beyond these points.
Alternatively, there are large red project range brackets on the timeline and mini layer range handles for the layer you can drag.
Martin Brennand | Product Manager | mocha – Imagineer Systems
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You’re best doing this as two separate masks, since her head turns 90 degrees. Track the face, then the side of the head, and modify the splines accordingly. A ‘bob’ should only occur if the track is not solid.
If you’re still having some difficulty and want to send the original clip directly to us, we can recommend the best practice by going over the clip: support[at]imagineersystems.com
Martin Brennand | Product Manager | mocha – Imagineer Systems
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If you want it to fit exactly to a certain look, the better way to do it is corner pin your insert first to the screen, and then apply an Aligned Surface track export instead:
- Apply a manual corner pin to your insert layer in After Effects and place it in the desired position for any frame.
- On this frame, Precompose the layer and make sure all attributes are inside it.
- You will now have a precomposed layer that is the same dimensions as the tracked footage.
- In mocha, go to the same frame in the footage you applied the corner pin to in After Effects and select the track.
- On this frame, turn on your surface and click “Align Surface” in the Layer Properties panel.
- You will see the surface fit to the full dimensions of the footage.
- Export this newly aligned track to After Effects corner pin.
- Back in After Effects, select the precomposed layer and paste the data.
Martin Brennand | Product Manager | mocha – Imagineer Systems
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Glad it worked!
I think what we need to do is add a new parameter in mocha to make this clearer, even if it’s just a “set 100%” button. I’ll write it up as a feature for future versions!
Martin Brennand | Product Manager | mocha – Imagineer Systems
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100% Scale is determined by the last place you adjusted the surface.
If you’ve tweaked the surface somewhere in the shot, mocha will take that position in time as the 100% scale, then scale up and down fro there.
So the solution is to tweak the surface from the largest point.
Martin Brennand | Product Manager | mocha – Imagineer Systems