What happened to the NVenc Constant Quality encoding option in v18?

EEVblog wrote on 2/16/2021, 5:58 PM

Previous versions had a Constant Quality (QP) option on NVencoding, but it's now gone in v18, why?
This is my single most important rendering requirment.

Comments

Musicvid wrote on 2/16/2021, 7:26 PM

In your left image, the Default preset is selected. In the right hand image, High Quality is selected. Does this make a difference?

RogerS wrote on 2/16/2021, 7:37 PM

I don't see it but I've never seen it in Vegas. What version did it work in?

In Voukoder NVENC, I also don't see constant quality but rather constant quantizer.

EEVblog wrote on 2/16/2021, 8:05 PM

In your left image, the Default preset is selected. In the right hand image, High Quality is selected. Does this make a difference?

Thanks. But no that's not it.

wwaag wrote on 2/16/2021, 9:05 PM

If you use Voukoder (or HappyOtterScripts) you can set the quantizer value as shown here. While earlier versions of Vegas (V15-V17) had this as an option as you have indicated, there was never a way to actually adjust it, which may be why it is not shown in V18.

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EEVblog wrote on 2/16/2021, 9:10 PM

If you use Voukoder (or HappyOtterScripts) you can set the quantizer value as shown here. While earlier versions of Vegas (V15-V17) had this as an option as you have indicated, there was never a way to actually adjust it, which may be why it is not shown in V18.

Will give that a try, thanks.
I would use Handbrake but I always had problem with the Vega integration of that.
Still doesn't explain why they seem to have removed the feature entirely in v18 though?

EEVblog wrote on 2/16/2021, 9:16 PM

Voukoder doesn't install properly I'm afraid.

Musicvid wrote on 2/16/2021, 9:30 PM

No, installing the core component first is necessary before installing the Vegas plugin.

EEVblog wrote on 2/16/2021, 10:49 PM

No, installing the core component first is necessary before installing the Vegas plugin.

Thanks. Working now and rendering. Very slow on default settings compared to the NVenc QF encoder or VBR though, so not the best solution.

lenard wrote on 2/16/2021, 11:06 PM

Are you actually using Nvenc via voukoder?, you have to select the option via the menus

 

RogerS wrote on 2/16/2021, 11:07 PM

Voukoder should be somewhat faster than NVENC encoding with MagixAVC. Maybe share a screenshot of your render settings.

Last changed by RogerS on 2/16/2021, 11:07 PM, changed a total of 1 times.

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Try the
VEGAS 4K "sample project" benchmark (works with VP 16+): https://forms.gle/ypyrrbUghEiaf2aC7
VEGAS Pro 20 "Ad" benchmark (works with VP 20+): https://forms.gle/eErJTR87K2bbJc4Q7

lenard wrote on 2/16/2021, 11:21 PM

Are you actually using Nvenc via voukoder?, you have to select the option via the menus

 

I had a look at your YT channel and I notice you only upload in 1080P, however you may edit in 4K, but render out a 1080P. Voukoder will render at your project resolution so this could also be a reason for the slowness if you are sure it was using Nvenc. In filters/ zscale you can add for 1080P resolution

EEVblog wrote on 2/17/2021, 12:28 AM

Thanks everyone. I goofed and had the CPU version selected. NVENC x264 selected and it's now indeed faster than the Vegas NVenc QP
Unfortunately the file size is bigger than the VBR version, where the QP Vegas version used to be much smaller.
I have QF23 set, and it's 1080p project so its should be smaller than normal 8Mbit minimum VBR.
I need to experiment further, will pull in an older v16 or v17 project and compare renders.

EEVblog wrote on 2/17/2021, 1:56 AM

For those interested a did an expeirment with Voukoder on v18 vs Magix NVENC QP on v17