How is that done?

mel58i wrote on 5/30/2008, 10:29 AM
There is a programme intro on ITV (british) that shows a eastern market scene with the ITV logo weaving in front off and behind people and objects in the scene (sorry, can't provide a clip - but the brit forum users will know what I mean).
The only way I can think of, is using "blue screen", but there are that many people and objects for the logo weaving that I think it is an almost impossible task!
Anyone any thoughts on this one?

Mel.

Comments

busterkeaton wrote on 5/30/2008, 10:41 AM
It's probably done through a rotoscoping software, not a simple editor. Think Shake, After Effects, Boris Red

If you search rotoscoping on youtube, you'll see a lot of examples.

Using rotoscoping, you can select each object in a frame and then remove all others like a blue screen after the fact. It sounds like an impossible job, but they don't have to tweak every frame. There is usually a "motion tracking" feature that captures how that object moves. So using this technique, they could create a different track for every person or object in the market.
Chienworks wrote on 5/30/2008, 10:55 AM
Yes.

And don't discount the application of more money, time, and people than you can imagine.
JohnnyRoy wrote on 5/30/2008, 11:34 AM
Yea, I've done something very simple like this. I had a video of a statue and needed to have text rise up from behind the statue but in front of the background. I rotoscoped it in Boris RED. In fact, RED has motion tracking so you can have masks follow objects quite easily. It sounds like they are just using multiple layers.

~jr
richard-courtney wrote on 5/30/2008, 12:04 PM
IF you already have the scene with all people in place then yes there is going
to be a lot of keyframing and making masks. Not impossible but time consuming.

Chromakeying individuals and then compositing would be easier.