Hasta La Motion!

Hey guys It’s so great to have a community of experts to ask advice from!
I’m trying to parent roto points to a tracker. Hopefully giving me a horizon line based on three tracking points and three roto points. The middle roto point is a bezier and I want the left+right handles to average between the centre and side track points.

This should add the two track points together (minus 10px offset) and divide by two, hence giving me an average.

But, while in the expression dialog I get the correct result, after it’s applied it seems as if the "/2" is ignored.

Any ideas?

We had this discussion come up a while ago and I found this great article on vfxsoldier.

http://vfxsoldier.wordpress.com/2011…work-for-free/
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Hey All,

I have some difficult footage with a blue/green background and some annoying shadows.

I know there is no magic button to pull a good key, especially when the original footage is messy. I have something to look at, but it doesn’t look at all professional. I have attached a pre/post and my key node setup. Please note that white is not going to be the final background, it’s just to show you guys.

Any pros out there with advice on how to approach a hard key? You can see I have some bad outlining on the arms. Maybe I’m just screwed by the shadows on the original footage, but let me know if you guys have any ideas on how to solve my problem. Holistic or specific answers totally appreciated.

Oh and please forgive me if my script is a sinful mess. I’m a newb.

Thanks so much!
Paul

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