-
Very low frame rates during RAM preview
I just got a brand new system – 3.73 GHz Pentium with 2 GB RAM, and when I RAM preview stuff in afx, I’m getting non-realtime playback (around 6.5 fps!). I figure there must be a setting I’m missing, since my old system was able to play back those same effects at realtime.
I’ve tried using all the different renderers, std 3D, adv 3D, and Open GL, all with the same results. I also checked the memory use settings and they are fine…
Any ideas?
Thanks,
JasonPS – It’s not a “don’t-use-the-spacebar-to-preview-things” issue.
-
4 Replies
-
are you doing a ram preview or just hitting the spacebar? Hitting spacebar is not RAM previewing – just playback, and it often runs slowly. On one machine it could be faster depending on your hardware, and it may have nothing to do with your processor. It could be you video card too (see below).
A Ram Preview will generally playback in realtime since it’s all queud up – though sometimes at 100% size, on heavy projects, my audio has been off.
Check your Ram Preview settings (in the time controls window) to make sure it’s not skipping frames.
Have you set up an image cache folder where AE can dump ram previewed frames – this helps play things back, and speed up RAM preview for untocuhed frames – they don’t get lost.
Other issues that could come into play here (more with play back, than playback with RAM Preview)…
Are you using 3D? Is your 3D card working properly? Maybe it needs a driver update, or perhaps AE doesn’t support your card? If you are trying to playback 3D in realtime, also make sure Open GL is on in AE.
—————————————-
Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com
—————————————-
Creative Cow Master Series DVD
particleIllusion Fusion Volume 1
available @ http://www.pIllusionFusion.com -
I’m doing a real preview, not a “spacebar” preview.
I’ve been doing some experiments and I think the problem is being caused by the display plugin that was installed to output the preview through my Matrox RTX 100 card. When I remove those output plugins and restart AFX, the previews run fine at 30 fps (but I don’t get to see the preview on the monitor). I think I can output the preview through the 1394 port instead and avoid the Matrox driver.
I think I’ll go yell at Matrox anyway… Maybe they have a fix.
Thanks!
Jason
-
I’ve been having the same kind of problems with my Kona card, using a Blackmagic driver. I’m going to try your idea!
Kool En De Anderen
dual 1.8 gig G5/Mac OS 10.3.8/Kona SD/FCP 4.5/AE 6.5 Pro
http://www.koolendeanderen.nl -
I use the Matrox RTX 100 card and had the same problem. I unstalled the After Effects plugin and use export via 1394 to view the previews. This solved the problem (as I’m sure you’ve tested and discovered by now!). If you find another fix, let me know.
Doug
Reply to this Discussion! Login or Sign Up