As we know  " Adobe After Effects " is a Powerful tool to create a own video and add something of own.

A casual problem of After Effects is Rendering, " NOT realtime "  at RAM preview will be shown and Rendering will be stopped the Reason's of those error's are given from us, this results worked on all systems and all type's of O.S's.

This used to be a much more common problem in Days Of Yore, when a fast machine would scream along on a single 266 mHz processor. Computers have gotten faster, but then along came 1920x1080 HD, containing 5 times the number of pixels as a frame of SD video.

There are a few tried-and-true strategies you can use:
• To check overall motion, reduce comp window size to 50% and resolution to half. Still not previewing inreal time? Reduce resolution to a quarter or something.
• To check a certain portion of the animated image, you can crop it. There's a toggle switch for the crop at the bottom of the Comp Window.
• You can play every other frame with Shift-RAM Preview.


Then there are some newer things to try:
• Turn off Open GL. AE's Open GL support is every bit as lousy as its Mp3 support.
• Once Open GL is off, enable Multiprocessing for RAM Previews.

Please comment if any issues's rises.

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