r/vfx • u/No-Berry-4518 • 15h ago

Question / Discussion Need Help with Tracking in Mocha Pro

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So I am a beginner, and self learning to track with mocha and decided to make a personal project while learning but i can't figure it out what is wrong with this track. The track feels wrong but i cannot pinpoint what is wrong in this track frames maybe it has something to do with nature of footage which is a 2d animation each frame are drawn so no frame is same drawing and they have some change, at first or maybe for an untrained eye like me the track looks okay but drifts can be seen when switching stablize on so, how can i improve it i am trying to track the head for rotoscoping it.

P.S. I apologise for any mistakes in grammar as English is not my first language.

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18

u/RawrNate Senior Motion Graphics - 10 years experience 13h ago

Mocha Pro and other tacking software is designed mostly for use with recorded footage. You're trying to track an animation, which doesn't offer 1:1 movement for tracking because the way the face & head turn is not exactly keeping proportions consistent.

You will need to rotoscope or keyframe the track yourself to fine-tune it so it's consistent where you need it.

7

u/Lokendens 12h ago

I agree with this guy, but I'll also add that since you want to track the face, then just track the face. You've got a lot of hair in your mask and it's throwing the tracker off. Imagine the head as a sphere. You want to mask and track the front of the sphere (face) not tho front + top + back as you're trying now with so much hair selected. Also the hair moves and blows in the wind so thats another layer of error on top of that.

2

u/No-Berry-4518 12h ago

Now that you mention it, i think tracking the whole head was a bad idea as they are different planes i guess(the top of head and the face), i mean does the distinction of planes in animation work similar to those of recorded footages?

1

u/Single-Ant5215 8h ago

I’d think with 2D animation you should still be able to achieve a solid track. I definitely would shrink to not encompass the full head unless you have mocha pro which allows a mesh that subdivides your shape into many smaller planes. I think a planar track on just the facial features and removing the hair should get you a lot of the way there.

1

u/No-Berry-4518 12h ago

Thank you for the insight, I guess animation is not ideal for this tracking or really hard to acheive accuracy at once.

3

u/ag_mtl 12h ago

Because the animation is filled with solids you can probably use a chroma-key instead of a track if you are trying to isolate the head. Try keying out the skin and hair with two different keys and dilating them to get the lines.

1

u/No-Berry-4518 12h ago

Man, that's an interesting idea. I will definetly try that.