Inspiring

Answered

Slow rendering. Fast computer. Why?

Forum|Forum|6 years ago
July 22, 2019
5 replies
9782 views

I have a 4 second clip that will take 40 minutes to render. IThe only effects applied are REVisions "Auto Contrast" and Neat Video "Noise Reduction".

The clip was shot on C300 Mark II 4K RAW output to Odyssey 7Q+, so clip is a ProRes 422 HQ.

I have a AMD Threadripper 2990WX (overclocked to 3.8 ghz on all 32 cores), Nvidia 2080Ti, 32GB RAM at 3200Mhz, and NVME SSDs.

Sooo, isn't the speed of this render slow? Is there some secret setting that I forgot to enable/disable?

Please see screenshot.

https://i.paste.pics/8bb3bf804eeaa4a6b1b1b54decaf0733.png

This topic has been closed for replies.

Correct answer SAFEHARBOR11

I use Neat Video Denoiser and denoisers in general do take a long time to process. A few years ago, was looking at 24 hours to do a 30 minute HD clip!! In the the newer version of Neat Video, you can now optimize the processing to best utilize your CPU and GPU setup and the GPU acceleration has greatly reduced my render times. It's in the settings somewhere, no access to it at the moment. But please do that for starters to make Neat as fast as possible. Note I have not tried Denoising 4K footage, which has 4X the pixels as HD, so likely will take that much longer than the HD processing.

I should also note that when applying a Denoiser in the Premiere timeline, things can grind to a halt. Meaning you may not be able to scrub/play/preview the footage smoothly with Denoiser applied, so it really kills the edit experience. What I often do is put the source clip on the timeline by itself, apply ONLY the Neat filter, then EXPORT as a new clip that is Denoised, using a good intermediate codec (basically lossless quality from original). This process is something I will just let run overnight for instance so no down time. Then import the new clip and do all your editing with that, add more effects etc.

Some combinations of effects, especially with 4K, can take a VERY long time to render. In some cases, the total rendering time will actually be LESS if done in two passes. Meaning denoise the footage and export to new clip, then add more effects to new clip and export that, and total rendering time of both export passes could be substantially less than if exporting it all at once.

So for instance you want to apply both Warp Stabilizer and Neat Denoiser...can pretty much guarantee you would save time in the end to export in two passes. Render times can increase exponentially when combining certain effects! Denoisers work by comparing adjacent frames, so doing a math on millions and millions of pixels for every frame processed. Well, Warp is doing something similar, so imagine the two of them competing with each other when rendering.....let them each do their own thing in two passes and time is saved, it is more efficient. Not that you are using Warp, but you get the idea - some color filters can be pretty intensive as well.

Thanks

Jeff

MyerPj

Community Expert

IWonderFilms wrote
I have a AMD Threadripper 2990WX (overclocked to 3.8 ghz on all 32 cores), ... [with] 32GB RAM

Just a heads-up, your system lacks ram. I good target is 8 to 10 GB's per core... you're at 1GB per core...

It's generally believed that PP doesn't benefit much beyond 8 - 10 cores, and After Effects uses even less, but needs plenty of ram. I was watching my ram usage in AE recently and it went over 59GB during a ram preview in my 6 core.. So, be aware of that.

T

Todd HartAuthor

Inspiring

When I use other built-in effects, rendering takes 2 -3 minutes. I really appreciate all the help. If anyone else had similar problems, I'm still all ears (or eyes).

B

basil1891

Inspiring

Your timeline is "red", I guess that it renders in "software-only" mode, and likely because of a bug in Premiere. Details here:

Re: Order of filters/effects and drop in CUDA-rendering speed, is it a bug or a feature?

Also, your plugin(s) could be not well optimized for multi-threading.

Try to check the CPU/GPU utilization during rendering to get hints where the problem is.

Ann Bens

Community Expert

Neat Video is notorious for long render and export times.

Why do you need REVisions "Auto Contrast does not Lumetri cut it?

R

rodneyb56060189

Legend

the bottom line is don't get discouraged by responses to your post. There's no magic solution cause everyone's source footage, computer hardware, and 'exports' are different... it's just a matter of tweaking what you have ( in your case some really nice stuff ) to make it work for what you want to do.

So be of good cheer ! And keep shooting !

S

SAFEHARBOR11Correct answer

Participating Frequently

I use Neat Video Denoiser and denoisers in general do take a long time to process. A few years ago, was looking at 24 hours to do a 30 minute HD clip!! In the the newer version of Neat Video, you can now optimize the processing to best utilize your CPU and GPU setup and the GPU acceleration has greatly reduced my render times. It's in the settings somewhere, no access to it at the moment. But please do that for starters to make Neat as fast as possible. Note I have not tried Denoising 4K footage, which has 4X the pixels as HD, so likely will take that much longer than the HD processing.

I should also note that when applying a Denoiser in the Premiere timeline, things can grind to a halt. Meaning you may not be able to scrub/play/preview the footage smoothly with Denoiser applied, so it really kills the edit experience. What I often do is put the source clip on the timeline by itself, apply ONLY the Neat filter, then EXPORT as a new clip that is Denoised, using a good intermediate codec (basically lossless quality from original). This process is something I will just let run overnight for instance so no down time. Then import the new clip and do all your editing with that, add more effects etc.

Some combinations of effects, especially with 4K, can take a VERY long time to render. In some cases, the total rendering time will actually be LESS if done in two passes. Meaning denoise the footage and export to new clip, then add more effects to new clip and export that, and total rendering time of both export passes could be substantially less than if exporting it all at once.

So for instance you want to apply both Warp Stabilizer and Neat Denoiser...can pretty much guarantee you would save time in the end to export in two passes. Render times can increase exponentially when combining certain effects! Denoisers work by comparing adjacent frames, so doing a math on millions and millions of pixels for every frame processed. Well, Warp is doing something similar, so imagine the two of them competing with each other when rendering.....let them each do their own thing in two passes and time is saved, it is more efficient. Not that you are using Warp, but you get the idea - some color filters can be pretty intensive as well.

Thanks

Jeff

R

rodneyb56060189

Legend

can you post a screenshot of your export settings ??