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RAM preview not playing real time.

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Alana ReesRAM preview not playing real time.
by on Oct 16, 2009 at 5:16:31 pm

Hi,

Having an issue with AfterEffects CS4 running on a Mac. When we try to do a RAM preview the play back is not playing back at real time. The comp was built at 29.97 but the RAM preview is playing at 20fps. Any ideas what may be causing this?

Thanks in advance!


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Dave LaRondeRe: RAM preview not playing real time.
by on Oct 16, 2009 at 5:29:24 pm

What kind of comp? HD? What kind of Mac? How many cores? It's tough to give you a straight answer without more information.

Usually RAM Previewing with the comp window size set to 50% and the resolution set to half does the trick.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Kevin CampRe: RAM preview not playing real time.
by on Oct 16, 2009 at 5:36:35 pm

first of, when you say ram preview, you do mean hitting the zero on the numbers pad, not space bar, right? zero caches to ram and spacebar caches the frames to disk, so space bar may not play back in realtime.

second, if you have a video preview (preferences>video preview) set to play back on an external device (like a deckilnk or aja card, or even firewire) then you can get slower than realtime playback depending on the native settings of the hardware and the comp settings. try disabling the preview to any other source except the computer monitor... if that helps, you may be able to find comp settings that will work better with you device, or try setting the output quality to 'faster' in the video preview settings.

Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW


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Alana ReesRe: RAM preview not playing real time.
by on Oct 16, 2009 at 9:20:23 pm

Thanks for both responses. Works great now, Kevin -- much appreciated!


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