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RAM preview not rendering whole comp…not what you think
OK so this question has been asked and answered before but I’ve got 12 gigs of RAM in a new Macpro. There’s no way I’m runnig out of RAM right? Why won’t AE CS4 RAM preview my whole comp?
and yes my work area is set to the whole comp which is only 15 seconds
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4 Replies
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How many seconds is it giving you when you RAM preview?
Arie Stavchansky | Demo Reel | Portfolio of Creative Work | Blog
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Here’s a quote from the “Memory usage and storage” section of After Effects Help:
“The operating system imposes certain limits on the amount of memory that an application can use. After Effects on the Mac OS X operating system can use up to 3.5 GB of RAM, although only about 3 GB is actually available to the foreground application, because Mac OS X uses approximately 500 MB to load the user interface libraries.”
So, the most RAM that After Effects can use to hold frames cached for RAM previews on Mac OS is about 3GB.
That extra RAM that you have is useful for allocating to background processes for multiprocessing with the Render Multiple Frames Simultaneously feature.
You can get longer RAM previews by doing things like decreasing resolution for previews. See the “Improve performance” section of After Effects Help for some tips.
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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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“Caching to disk greatly helps when rendering memory intensive composition, but the render engine still needs to be able to store the largest element of your composition into your ram. After Effects requires a contiguous block of memory to store each frame, and in that case, enabling disk caching won’t help you.” 🙁
You would think they could program a cyclic add/remove memory for what you’re actually viewing at that time like streaming a flash, maybe that’s CS5.
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Thanks for the info everyone, that bums me out that OSX sets that limitation. Oh well, at least Maya is fast.
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