End loop then advance to next frame

Question

I'm building a presentation and I'd like it if I could set up the following:
There's a looping animation. It starts and ends with a solid transition to something else. However, I'm building this for a separate presenter (seveal, in fact) and I don't want to have to teach the timing over and over again. Plus I want this to be more consistant then the hope and pray method.
What I want to happen:
The presenter clicks the remote. The animation plays to the end of it's loop, then the slide transitions to the next slide. Advice?
Info:
Looping a Pro Res 422 file.
All-Mac workflow
OSX 10.8.4
Keynote '09, Version 5.3

Answer 1

if you are creating the loop animation within Keynote:
create a new Keynote file
add the images you want to animate
Inspector > Build: select a build effect then more options, select start build: to automatically after prior
create the QuickTime file:   Keynote > Share > QuickTime and set it to loop
create a new presentation
place the QuickTime file on slide 1
Inspector > Transition > select a transition effect and choose start transition on click
create a new slide and add the content you want