Really disappointed with HEVC

Uwe-Erbrich wrote on 8/19/2019, 6:22 AM

Back from vacation I just corrected the original table as promised by updating 2 numbers and uploaded it to the original place.

Uwe-Erbrich wrote on 8/19/2019, 6:31 AM

@Musicvid As I plan to repeat some of the testing with Vegas 17 to look for relevant changes to Vegas 16, what settings would you recommend to test for HEVC as per your last comment?

j-v wrote on 8/19/2019, 8:17 AM

@Uwe-Erbrich

I did some testing with VP17 to test HEVC QSV and HEVC NVENC as rendertemplates on laptop from signature.
I tested a 60 sec 4K HEVC file from my GOPro 7 with this MediaInfo

First I rendered those 60 sec with SeMW autolevels FX to Magix HEVC QSV 50p default template. In Vegas for all things ( hardware acceleration and FileI/Q) set to QSV. Rendertime 370 sec, more than 6 x realtime with this loads of the taskmanager

Then I rendered to my usual Magix HEVC 50p with NVENC. In the Vegas preferences the Nvidia for hardware acceleration and File I/Q.
Rendertime 181 sec., 3 x realtime with this load

Uwe-Erbrich wrote on 8/20/2019, 2:36 PM

@j-v Very interesting. It clearly shows that hardware rendering is much faster. The difficult part seems to be to decide upon the acceptability of the quality trade off. As the difference to CPU rendering is pretty drastic it becomes more and more difficult NOT to use hardware rendering. Your parameters are for sure good starting points for my own tests (I think I will wait for the first Vegas update before I start).

My goal is to decide upon a PSNR value (and the associated Mb per second), below which the render quality is unacceptable. My own tests up to now would suggest that the value is around 40 on the usual logarithmic scale.

j-v wrote on 8/20/2019, 2:50 PM

@j-v Very interesting. It clearly shows that hardware rendering is much faster.

Both tests are rendering with help of the GPU, first all QSV( Intel 630) and second all Nvidia (GTX 1050).

Uwe-Erbrich wrote on 8/20/2019, 3:48 PM

Ok, thanks. You are right and I misunderstood. Still quite a difference. How would you judge the Q- difference Intel QSV and Nvidia?

j-v wrote on 8/20/2019, 4:11 PM

The biggest difference concerning previewing ( decoding) and rendering between VP16 and VP17 is the File I/O setting in Preferences. When I set that on NVIDIA NVDEC, the decoding of heavy AVC and HEVC files gets a lot faster.
Thats gives more relief for the CPU to do the other tasks at the rendering.
Hardware acceleration and encoding went normal as VP16, but is also much faster as without GPU as the old MC codec.

Uwe-Erbrich wrote on 8/21/2019, 1:07 PM

Thanks for the info!

francescosc wrote on 10/27/2022, 4:45 PM

i used the super computer of my university to render braveheart and let it run for five straight days. results are stunning. now i see things no-one else does. I hear voices in my head. My neighbor says I need to get treatment, but she has no idea WHAT a movie she's missin. And I'm not even awake when I see it. Huh?