improving RAM previews

[Darby Edelen]

[paul nevison] “Is there something i can do to improve the previews?”

You can also set the RAM preview to skip frames, which doesn’t really ‘improve’ the preview but it does extend the amount you can preview.

I usually RAM preview at half rez and skip every other frame to get the timing right and then spot check it by scrubbing at full rez (or full rez RAM preview for important/involved spots) to make sure there are no anomalies.

Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA

[Paul Nevison]

thanks Darby,

I’m pretty new at AE so any tips are appreciated. Does having more RAM help with this i wonder? How much RAM can AE CS3 actually access?

Macpro Duel core 3Ghz
4.0G RAM
OS 10.4.11
QT 7.3.1
FCP 6.0.2
AE CS3 8.0.1.8
BMD Decklink HD Extreme 6.6
PAL Land

[Darby Edelen]

[paul nevison] “How much RAM can AE CS3 actually access?”

AE CS3 can access 3GB of RAM per instance on a Mac. However, the amount available for your RAM previews will be determined by the Cache size in your Memory & Cache settings. I haven’t tested RAM previews with multiprocessing enabled, but I would hope that if you had it enabled with 3 instances of AE you would have a limit of 9GB of total RAM (3GB per processor) for renders/previews.

Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA

[Peter Van der zee]

With after 7 on intel, memory issues were a dissaster, CS3 is a lot better but I find a lot of times
RAM “fills up”. Do you Purge the memory? (since you’ve said to be new) edit-purge-all, normaly does the trick. Another thing is the size of the comp; a big comp cost after a lot to preview, you can pre-comp in a smaller one, size down and enjoy full-length previews.

vanderzee.tv

[Paul Nevison]

thanks a lot folks….didn’t know about purging the cache but that seems to have helped performance a lot.

nice tip on the resizing of a precomp!

thanks

Macpro Duel core 3Ghz
4.0G RAM
OS 10.4.11
QT 7.3.1
FCP 6.0.2
AE CS3 8.0.1.8
BMD Decklink HD Extreme 6.6
PAL Land

[Peter Van der zee]

Not entirely, Dave, I’ve noticed with extreme comp-sizes, even in quarter and 25% screensize, a preview stops halfway. Precomping in a quartesize comp, previews the whole length.
Don’t ask me why…

vanderzee.tv