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Avoid a QuickTime playback issue in Keynote '08 Apps
While working on my slides for my upcoming "Best of Leopard Hints" talk at Macworld Expo, I ran into a very strange issue: embedded movies would cause my slideshow to come to a total halt -- the movie wouldn't even appear onscreen, much less play (though it appeared just fine on the presenter display).

After some googling, I found the (very odd) solution in this thread over on the Apple Discussions site. Open Keynote's Preferences, then click on the Slideshow section, and check (enable) the 'Allow Exposé, Dashboard and others to use screen' preference. Despite the warning below that option about affecting animation performance, this solved my problem: as soon as the preference box was checked, the formerly non-playing videos started working perfectly.

It seems quite counter-intuitive, but whatever the reason, I'm glad it solved the problem, as I was quite stumped!
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Avoid a QuickTime playback issue in Keynote '08
Authored by: frenchfries on Jan 07, '08 12:18:25PM

Thank you!!! I've already had to look like a total loser when I gave a talk with the mysterious black out problem.



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Avoid a QuickTime playback issue in Keynote '08
Authored by: mdeatherage on Jan 07, '08 09:44:14PM

I'm without my regular computer and E-mail and such, so this is off the top of my head, but:

it seems likely that QuickTime is trying to use the GPU during movie playback for performance reasons. If Keynote is somehow preventing other applications from accessing the GPU, then QuickTime's playback might just vanish, kind of like it does over older screen-sharing software that doesn't see changes that happen only inside the GPU/video card.

If that's the case, then letting other applications "use the GPU" would seem to be the solution, and that might explain what you're seeing.



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Avoid a QuickTime playback issue in Keynote '08
Authored by: sivasothi on Jan 08, '08 04:03:16AM

Gosh, thanks a million! Was scratching my head when this happened suddenly last semester, all of a sudden. I switched in and out of Keynote since it was ust the last couple of lectures. This makes all the difference!



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Avoid a QuickTime playback issue in Keynote '08
Authored by: netrokid on Jan 08, '08 06:49:06AM

I think the reason checking the "Allow Expose, Dashboard, and others to use the screen" fix works to allow third party quicktime Plugins. When I first checked the box, the slide I had with quicktime movies would play, but the .movs were choppy in "loop back and forth" (when they were looping back) mode.

I removed all my quicktime Plugins and out of curiosity unchecked the "Allow Expose etc/". Result was that Keynote now handles slides with quicktime movies fine. I now keep my plugins in a separate folder and will return them to the quicktime folder in my home Library as needed.



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Avoid a QuickTime playback issue in Keynote '08
Authored by: whiskeyred on Oct 30, '08 11:16:41AM

I'm running Leopard, QT PRO, And Keynote 4.0.3 I still can not get video to play even though I've done exactly what was posted here.

Any more help?



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