Multiprocessing question

[Jeff Greenberg]

If you’re on 5.5, which is 64 bit (can’t recall if 5 is 64 bit) then I think, yes.

On 5.5, if you’re using mercury accelerated fx, the video card (if you have a CUDA card that works) handles the renders (which is faster than multiple cores.)

When you place an AE comp in Premiere Pro (again, 5.5), Premiere Pro launches a headless version of AE to do the renders – so multiple cores work. You can see this if you bring up the Task Manager/Activity Monitor (PC/MAC) and you’ll see an instance of AE launching. As I understand it, Media encoder too.

Best,

Jeff G

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[Todd Kopriva]

It’s important to distinguish between two kinds of multiprocessing:

1) After Effects can launch several instances of itself to render frames in the background, with each instance of the application working on a separate frame. This is what is enabled by the Render Multiple Frames Simultaneously preference.

2) After Effects can spread threads across multiple CPUs to assist in the rendering of a single frame. This is always on (unless you remove the MThread plug-in).

When you are using Dynamic Link from Premiere Pro, the headless version of After Effects that is called to render frames uses (2) but not (1). In other words, Render Multiple Frames Simultaneously multiprocessing does not work with Dynamic Link.

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Todd Kopriva, Adobe Systems Incorporated
Technical Support for professional video software
After Effects Help & Support
Premiere Pro Help & Support
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[Tom Gomez]

Thanks for clarifying…

Which is faster? By how much? Which does Media Encoder use?

Just trying to get things fully optimized for top speed. Most of our projects are full of simple, but frequent AE elements, but we edit footage and comps in Premiere, and would like to render from Premiere and/or ME.

Please advise!

THANKS!!!

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