Problem with Frame-Rendering Times

Forum|Forum|1 year ago
May 26, 2024
4 replies
3759 views

Hey guys, as you can see in the title I have a problem with the frame-rendering time:

When I apply a bit more complicated effects (e.g. Pixel Motion Blur) in my project, the time for the frame-rendering gets extremely high (up to 1s per frame), even when I set the workspace bar very low, like 1-2 seconds.

I already activated Mercury-GPU-Acceleration (CUDA) and Multi-Frame-Rendering, set the Disk Cache up to several hundred GBs (I know it doesn't have to be that high but just in case), of course updated my graphic drivers and gave After Effects 11 GB of my RAM.

The thing that's weird is, the Task Manager shows only a pretty low utilization when actively rendering complicated effects: around 40% CPU, 70% Memory, 30% GPU and 0% Disk.

My specs are the following:

Windows 10 Home

Nvidia Geforce RTX 2070 Super

Intel i7-8700k

16 GB RAM

200 GB SSD on which I installed After Effects

1.8 TB SSD on which I put the Disk Cache

I hope you can help me with this problem, thanks in advance.

Performance

This topic has been closed for replies.

֑nubnubbud

Inspiring

you won't get much better.
https://www.pugetsystems.com/solutions/video-editing-workstations/adobe-after-effects/hardware-recommendations/
you can see in these validated tests, that everything from $12000 render farm stuff to $2000 midrange PC's, the render speed difference won't be night and day. I would say probably about 60% of the resources used are for backend processes that don't increase performance, but just "need to happen" for the program to do the thing at all. They even give you the benchmark so you can compare! handy!

"After Effects used to make great use of high core count systems (including dual Xeon) but starting with AE CC 2015 most tasks no longer benefit from having a high number of CPU cores. This is largely due to the fact that Adobe removed the “render multiple frames simultaneously” feature in part due to the fact that they are starting to integrate GPU acceleration. It used to be that more cores = faster... but because higher core count CPUs run at a lower speed, a CPU with around 8 cores will be faster than a higher core count CPU or even a dual CPU setup. Multi-frame rendering brought some of this back, but from our test data it doesn’t scale well enough for a dual CPU workstation to give an advantage over a single, high core count CPU." -Puget Systems

is the not-so-short and long of it.

also, more RAM won't hurt. 64GB should be goot for 1080p, but you'll want to max it out or get at least 128 for 4k... though sadly, given AE's performance, filling up that RAM for playback is gonna be a pain and take a while because apparently 9 years is not enough time to convert the most common 32 effects to GPU compute.

J

Jonas26731151408lAuthor

Participating Frequently

Thanks for replying and researching!

But as I said, I already have 40gb of RAM allocated to After Effects and as you said, a couple more resources won't make that huge difference. I mean, my rendering times are extremely long and according to my task manager, nothing is that hard bottlenecking, so I think it's a software problem of my After Effects or it's Adobe's fault, but then again, it can't be that others have perfect render times with seemingly similar settings.

Btw sorry for replying that late

J

Jonas26731151408lAuthor

Participating Frequently

@Jonas26731151408l

Are you still running After Effects on an 8th generation i7 as indicated in your May 26 post?

@Warren Heaton10841144 Yes, but that can't be THAT big of a problem, right? I mean, back when this processor was recent, they already worked with complex effects without huge problems🤔 🤔

J

jenkmeister17177426

Jenkmeister

Pixel motion blur results in multiple frames having to be rendered to feed into the output of a single frame. So that's naturally going to slow down the speed that frames are rendered. 11GB of available RAM to AE will also fill up very quickly and then AE will need to spend a good amount of time writing rendered frames to disk to free up memory which will also slow down the renders.

I don't see what resolution you are working in nor the bits per channel, both of which may also be slowing down your rendering on lower levels of RAM.