rendering loses multicore performance by time

[Todd Kopriva]

Have you updated to After Effects CS4 (9.0.2)? It’s required for using Render Multiple Frames Simultaneously multiprocessing on Snow Leopard.

———————————————————————————————————
Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
———————————————————————————————————
If a page of After Effects Help answers your question, please consider rating it. If you have a tip, technique, or link to share—or if there is something that you’d like to see added or improved—please leave a comment.

[Wim Roegels]

Thanks for your response!

So far I do not have any special compressed footage in any comp: a couple of (big) PNGs used for different 3D Layers, green screen footage with Keylight (maby that causes the slow down) and that’s it.

Should not be a big deal.

I thought on using the Adobe Media Encoder as Alternative, but there are no setup possibilities to define the multi core usage – i would guess its the same like putting it into the AE que, but it uses even less horse power.

If keylight is the bittlekneck, are there keying plug ins supporting multicore?

[Wim Roegels]

Thanks for the hint, I already updated AE.

The strange thing fo me is, that it starts rendering with using all power, and while rendering the usage decreases – i extended RAM already.

I am not really getting it?

So far I used the normal Uninstaller to do a fresh install – should I use the script as an alternative. So far I thought this one is only for corrupted installations, where the deinstallation does not work at all …

Anyway: thanks.

[Adolfo Rozenfeld]

How much RAM do you have? How many cores/CPUs?

Adolfo Rozenfeld · Adobe

[Wim Roegels]

Mac Pro, 2 x 2.8 GHz Quad-Core, 14 GB RAM 800 MHz DDR2.

AE Prereferences:
RAM that can be used by other Programs: 1 GB
Minimum RAM per CPU: 2GB
Slider completly set up “Fast Render”
CPU’s that can be used by other Programs: 2

[Ej Hassenfratz]

I’m having the same issue, only I have CS3 and 16GIGS of memory.

Renders take FOREVER since I updated to Snow Leopard.

————————–

ej.hassenfratz
senior.graphic.designer
wjla-nc8/eyedesyn.com
washington.dc

[Jeremy Wiles]

I’ve got a brand new PC based system with 12gb ram, 4 dual cores and have this problem as well. Has anyone found a solution?

My current render is estimated at 33 hours.

Please help!

Jeremy

[Christian Hughes]

Hi there

Really interesting answer – Finally someone might be able to explain the problems I have been having!

I am using machine with an i7 processor, 8 gig ram, vista 64 bit.

I am capturing HDV footage into Premiere Pro CS4 as mpeg format 1080i. I have been doing a bit of colour correction on the footage both in Premiere and After Effects. When I come to export the movie as either a WMV or MOV through media encoder, the rendering starts off super quick (I can view all 8 cores on a widget on the screen), but then the processor usage will suddenly drop down to only using 1 core (and the ram usage will shoot up), the rendering may or may not kick back into using the rest of the cores, or it may just hang and never finish.

The effects arent complex on it, so have been wracking my brain as to why media encoder is having such a tough time.

Do you think the fact I am using captured HDV footage might be the problem here? If so, what would you use to convert it?

Many thanks in advance

[Paul Colton]

Has this been resolved? I am seeing the same issue. Few seconds of all CPUs being used, then it drops down hard to nearly 0 usage. I have 8gb ram 8core machine.

[Todd Kopriva]

> Few seconds of all CPUs being used, then it drops down hard to nearly 0 usage. I have 8gb ram 8core machine.

Paul,

8GB is not enough RAM to feed 8 cores. If you have 8 processes starting up and fighting for 8GB of RAM, then they’re going to starve and shut down. You’ll get better performance overall if you limit the number of CPUs to use and allocate enough RAM to each so that each one gets what it needs.

Exact numbers differ based on what you’re rendering, but I recommend starting with using 3 CPUs, with 2GB each, leaving 2GB and 5 CPUs for other applications.

See “Memory and Multiprocessing preferences”.

———————————————————————————————————
Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
———————————————————————————————————
If a page of After Effects Help answers your question, please consider rating it. If you have a tip, technique, or link to share—or if there is something that you’d like to see added or improved—please leave a comment.