Object tracking VS Motion tracking – shot concept help

[Anonymous]

Hi there,

I’m a long term motion graphics hobbyist and now venturing my way into VFX to take me away from the daily office blues…

I’m currently using an FXPHD copy of PFTrack 5.0r8 via VPN and was wanting to try a little project of my own to test my skills… I have a concept but then I’ve hit a snag

Basically I’d like to have a person walking around doing every day actions, and have a beating heart I’ve rigged in C4D beating in their chest, viewed like an x-ray and matching their movement of the screen, which could involve rotation and stretching.

Now I’m fine with the visual side of things – but as I’ve only just entered the realm of VFX, I’m a little confused as the the best approach I should take with the tracking and don’t want to charge along down the wrong path.

Would object tracking suffice for this sort of thing – or would the movement of clothes and limbs throw everything out of whack?

What do you feel would be the best workflow for this sort of FX shot?

Thanks for your help and input!

[Anonymous]

You’ll need to solve the camera first, and then solve the object. In PFTrack you’ll change the number of motion groups to 2 (the first being the camera and the second being the object motion of your actor relative to the camera’s position over time).

Yes – the movement of clothing will muck things up. When object tracking, the points you track must be static relative to each other. Otherwise you will find yourself rotomating the actor, and who REALLY wants to do that :).

[Author]

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