Ken Burns (was Re: Ripple)

[Ian Wood]

On 12 Jun 2007, at 14:38, David Bovill wrote:

> Hi Ian can you clarify - I've not read too deep on this:

I'll have a go. ;-)

QuickTime has a set of built-in transitions (*and* a set of built-in  
filters), going back many years (QT3?). These transitions and filters  
are available to any app using the QT APIs, and the filters can be  
seen when exporting movies from QT Pro, exactly the same as the ones  
in Trevor's external.
All of these use the CPU, and the transitions can be pretty rough  
with large areas and slower CPUs.

Core Image is a totally separate API that leverages the graphics card  
processor, but QT (in Tiger and above) is able to *play* them. They  
still aren't QT effects, though.

Basically there are two separate sets of filters and transitions  
available to Tiger, which cover quite a bit of the same ground.

Hope that helps a bit,

Ian