Noise Reduction performance (Resolve Studio) with Titan X

Hello,

I've been using the free version of Resolve on MacOS and I'm thinking of buying the Studio version mostly to speed up my noise reduction needs. Since there is no way to preview the performance without buying the software, I would like to know what I can expect with my system. I've been using NeatVideo (first v3 and now v4) and although the quality is quite good, the performance is horrendous. Forget real time, I'm talking several minutes of node cache rendering for even the smallest of clips in 1080p. It's basically unusable, and I have a fairly beefy system (with Titan X 12GB). It's also quite buggy. I've been talking to Vlad at NeatVideo and he suggested turning off GPU acceleration to make it more stable. He said the issue was with Resolve memory allocation, and not with them. Turning off GPU sure got rid of the stability issues, but the speed is even worse now, for obvious reasons --

Which brings me to Resolve Studio noise reduction. Can I expect real time playback of basic noise reduction with Titan X on 1080p material? Can I expect real time playback if I use higher quality / more agressive noise reduction? What about 4K?

Thanks!

You will definitely be able to get realtime playback with even extreme Temporal Noise Reduction, but once you add the new Spatial Noise Reduction (at Better quality), the speed will drop. I think it may actually be slower than Neat Video, and not quite as good, though more stable.

Francois,

I have a TITAN X and just switched over to DR 12.5 paid version.

I also have Neat noise reduction.

As you have discovered, Neat runs as fast as a snail in molasses. I get about 4fps

On my system, DR noise reduction, even when at max in spatial and temporal runs at close to 20fps.

Not quite real time but very good, considering and much better than Neat.

I cannot see any difference except Neat has its auto profile mode while DR is manual.

In DR I just adjust the sliders for the minimum noise in black and go no further.

My system is
Mac Pro 5.1
OSX 10.10.5
2 x 3.3GHz 6 core Intel
48 GB ram
GTX Titan X 12GB graphics card
USB3 card
OWC SSD 500Mb boot disk
4 x 6TB in raid 5 yielding 18TB

[Peter Chamberlain]

Multiple high spec GPUs in resolve will give even faster speeds.

Thanks guys. Seems like it's worth investing into the Studio version. And then at some point I can add a second Titan X.

Jack, what about 4K ? Have you been able to play with some footage and DR noise reduction? What kind of frame rate are you getting?

I run a Titan-X and a K6000 and realtime performance is not great - by the time you dial up useful settings with the temporal NR the playback is no longer realtime. I feel like performance has dropped with the 12.5 release - i'm expecting it to improve!

I should mention i'm talking about HD timeline with DNX media...

it depend how many gpu you have: with a 4/6 titan x you're almost realtime most of the time.

and because I have smart cache on, I'm coloring shot 33 and shoot 32 is rendering the cache in big.

I don't feel it.

More Titan X cards the better real-time TNR performance you'll have.

I run a Linux 5x Titan X system and it maintains real-time TNR playback 24fps HD frame (5 frame, Better, Large settings).

When outputting a 4k frame and decoding RED footage, real-time TNR performance drops significantly. Would a few more Titan X cards would help in this situation? Absolutely!

With 4K XAVC files, NR plays at about 6fps. Still faster than Neat, though.

[Peter Chamberlain]

Edit* I'm updating as Im told the the Xavc files are not as CPU bound as I thought.... a dual 14 core or higher will help decompress but in this case its likely the NR processing needs more GPU.

The Xavc files are CPU bound so something like a dual 14 core or higher will help decompress in real time.

Good to know!!

I'm planning a PC update too, and my initial idea was a 40% budget to CPU, 60% to GPU. But I'm recording Sny SLog2 and sometimes SLog3 in XAVC S. Half the footage is 4K.

Then, what's better for me?

1- Rebalance my budget and give 60% to CPU. I might buy a used workstation, Dual Xeon E5, or similar.
2- Conform footage to PRO-Res at acquisition on Resolve. (If pro-res decoding is GPU supported)

(Sorry if I'm too of-topic)