Cuda rendering in Vegas 12 Build 770

[Dave Haynie]

There are several different wheels in motion here, so it’s a little involved. In Vegas Video Perferences, there’s a setting to use the GPU. This affects Vegas itself: compositing, some effects that get their GPzu settings directly from Vegas. This always uses OpenCL, not CUDA.

There is a CODEC-specific setting in some renderers. For example, Sony’s AVC renderer can “Use GPU if available” — again, OpenCL only. Mainconcept’s AVC renderer lets you select CUDA, OpenCL, or CPU-only.

To really assess the effect of GPU acceleration on your system, you need to try all combinations, Vegas and CODEC with GPU on and off.

Now, the problems I know about. The one that affects nVidia users is the Fermi vs. Kepler issue. It has been widely reported (eg, outside of Vegas use) that OpenCL performance can suck on the newer Kepler architecture. That seems to be entirely nVidia’s implementation, not a Vegas issue. In fact, OpenCL itself changed very little from the Fermi to Kepler generation, but it’s basically a compiler.. it is necessary for these things to be optimized to the GPU architecture.

Next known problem: the Main Concept CODEC only supports the OpenCL deviced it knew about at release time. So only AMD GPUs, and only through the HD6xxx generation. I have a theory they did the same for CUDA as well. That would explain a newer nVidia not getting a boost even on CUDA mode.

-Dave

[Steve Rhoden]

I adore Vegas, but they really need to step up, and keep up!

Steve Rhoden
(Cow Leader)
Film Editor & Compositor.
Filmex Creative Media.
https://www.facebook.com/FilmexCreativeMedia
1-876-461-9019

[Steve Rhoden]

Will the dust ever settle!

Steve Rhoden
(Cow Leader)
Film Editor & Compositor.
Filmex Creative Media.
https://www.facebook.com/FilmexCreativeMedia
1-876-461-9019

[Tim Shepard]

Steve,

You’ve mentioned disabling software(s) that uses GPU… I’m making my build in the next two weeks. How do I go about doing that when it’s time to render? I too, ordered a Nvidia.

[Stephen Crye]

Sorry about the delay in responding.

I confess it has been so long since I fiddled with the settings, I not able to provide a cogent answer. They vary depending on the render – MainConcept, Sony AAC, etc. I suggest you experiment with the options, and test against the “red car” benchmark until you find the ones that work best.

Good luck!

Steve

Win7 Pro X64 on Dell T7500, MultiTB SATA, 12GB RAM, nVidia Quadro 2000, Vegas 12, 11, 10, 9 DVDA 6.0 & 5.2(build 135) Sony HDR-CX550V, Panasonic GH3 with LUMIX G X VARIO 12-35mm / F2.8 ASPH, LUMIX G X VARIO 35-100mm / F2.8

[Tim Shepard]

@Steve OK…

What is the “Red car benchmark”???

[John Rofrano]

[Tim Shepard] “What is the “Red car benchmark”???”

Back in the days of Vegas Pro 11.0, Sony had a benchmark that you could download and compare your results with their results. I have no idea why they took it down but you would think it would be in their best interest to leave it up if GPU acceleration was, in fact, better in Vegas Pro 13.0. Maybe someone has an old link to it. My 2008 Mac Pro 2.8Ghz 8-core with a Radeon HD 5870 ran the benchmark at the full 29.97 fps all the way through so I was quite impressed with my $740 purchase (for the entire computer) on eBay. 😉

~jr

http://www.johnrofrano.com
http://www.vasst.com