[Leopoldo Perizzolo]

The fastest way, given your current setup, would be to use the autotracer feature, under the layer menu. You either have to give it a precomp with an alpha trace or at least a contrast trace, then tweak the settings using the preview feature and autotrace for all the comp duration, then wait. Keep in mind that if you change any parameter of your original trace after the autotracing is done, you have to autotrace it again (it is a static feature, that does not change dinamically with changes you make afterwards).
Hope it was helpful.
Leo

[Leopoldo Perizzolo]

When there are no clear features to track, and corners get covered, the only way to track objects is to do it by hand. I tried using the best settings for mocha but there just aren’t enought features to track.
I hence used the built in after effects corner tracker – after going to tracking settings -> stop tracking with less than 95% accuracy so I could do it by hand, knowing that AE would screw up the data if it was left by itself – and manually set position for the two corners that got covered during some frames.

I attach a CC Power Pin effect preset with the data that I tracked for you — please note that I interpreted the footage to precisely 30fps, instead of 29.976: you HAVE to do it as well;
also, since the footage I tracked came from youtube, I had the whole project set to 1280 x 720p, as the footage itself.

To use it, extract it, then import the ffx file inside Documents/Adobe/After Effects _your.version_ /User presets and drop it down there. If you had AE open, close it and restart it.
Once in AE, use the settings I said before and then search for the effect “11848_powerpintracked” in the effects panel, then apply it on a solid.

https://f1.creativecow.net/11848/cc-power-pin-data

P.S.: I don’t really know how you’re going to get anything useful from this footage, since the book is the same color as the shirt of the actor; It’s going to be really difficult even for a rotoscope to get a good matte of the arm. If I was you, I would re-shoot the scene, using a darker book or shirt, or a coloured one. Also, add clearer freatures.

Hope the best,
Leopy

[Leopoldo Perizzolo]

A link to the tutorial would be useful. Try increasing the radius a lot and switch the render mode of the effect from “Full” to “Inside”.

Leopy

[Leopoldo Perizzolo]

It’s not a bug; there is not enough parallax for the camera tracker to understand the scene, so it can’t pull off a good solve.
My suggestion is, since it’s a quite easy camera movement, to fake it.

Leopy

[Leopoldo Perizzolo]

If you have Element 3D, you could do something like this:
https://youtu.be/P3BKw9jK-kI?t=5m13s
from 5:13 to 6:10.

Leopy

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[Leopoldo Perizzolo]

Testing…. ????

posA = [200, 400]; // "checkbox enabled" position
posB = [600, 100]; // "checkbox disabled" position

try{
if(effect("ADBE Checkbox Control")(1) == true) posA;
else posB;
}
catch(e){
value;
}
I didn’t make it universal.

Leopy

[Leopoldo Perizzolo]

Sorry, I meant:
posA = [200, 400]; // "checkbox enabled" position
posB = [600, 100]; // "checkbox disabled" position

try{
if(effect("ADBE Checkbox Control")("Casella") == true) posA;
else posB;
}
catch(e){
value;
}

Leopy

[Leopoldo Perizzolo]

Hi,
unfortunately it does the same as the previous code you sent me; in fact, it spits out the exact same values (although switched in sign).
I think the real problem lies in the if(…) -angle; else angle; statement; that abrupt transition from positive to negative should be solved otherwise.
Maybe the ae project I attached can help you try different approaches; I’ll link it again here: https://f1.creativecow.net/11724/11724
Thanks again!!

Leopy

[Leopoldo Perizzolo]

Something like this should do; apply a Checkbox control on the layer and paste this on the position property:

posA = [200, 400]; // "checkbox enabled" position
posB = [600, 100]; // "checkbox disabled" position

try{
if(effect("ADBE Checkbox Control-0001")(1) == true) posA;
else posB;
}
catch(e){
value;
}

Leopy

[Leopoldo Perizzolo]

I think this tutorial would do for the split effect:
https://www.youtube.com/watch?v=oOZY7Yks6hI

Leopy