Pre-Rendering Neat Video Effects is a waste of time?

[Gast]

I recently installed Neat Video for Premiere Pro because I was told it was faster at denoising than AE and it was. The issue is, the day before yesterday I rendered the selected clips that had Neat Video applied and everything looked great afterward, it all played through smoothly in the timeline with noise reduction applied. But when I exported the final video the next day after a few minor additions it still took 5+ hours to render as if it was rendering the effects again...

All my clips with Neat Video applied were still green in the timeline when I exported... I would have thought that the video would export in a matter of minutes as it normally does without having to render denoising. Did I do something wrong or is it a Neat Video bug??

[Ann Bens · Accepted solution]

The only time rendering your timeline is useful is when your export codec is the same as your preview codec and Use Previews is checked in the Export Settings.

[R Neil Haugen]

After you've applied Neat or any other noise reduction app and it's processed a clip, any other change you make requires the app to redo the processing.

So ... when you apply video noise reduction, you basically need to do a render/replace operation for that clip. Then the noise reduction process is finished for that clip. It will not need to re-do the analyzation as it's been used to essentially transcode to a new "clean" clip.

You can always "restore un-rendered" back to the original media if for some reason you need to do so. But I rarely need to. And this way, you do this once and it's done.

Neil

[basil1891]

Btw, since you are new to NV, check this guide about optimizing performance: https://youtu.be/XmzTYE5wSSk

[basil1891]

also this, order of filters does matter: https://youtu.be/7VT6BK15wAA

[Ann Bens]

Thanks for posting but initial question was more about preview files not being used in export.