Evaluation of HEVC decoders (SW, Hybrid and HW)

[el Filou]

OK, apologies for expressing myself badly.
What I meant is: how do you test that?

Originally Posted by aufkrawall

The Windows 10 video app surprisingly uses hardware decoding for HEVC 12 bit video.

A google search for "hevc 12 bit sample" or "hevc 12 bit demo" or whatever doesn't give me any downloadable results. Did you encode a 12 bit file yourself just to test?

[huhn]

there are files out there but if you really want to test it you better encode it yourself.

unlike 10 bit x264 which is very useful 12 bit x265 doesn't look promising at all.

[aufkrawall]

I simply used Handbrake Nightly, dunno if the stable version already offers x265 12 bit.
But beware, there seems to be some .net Framework issue with the Nightly, crashing the whole UI rendering of Windows. You might wanna avoid that if you don't like hard resets.
Linux gtk-git version works fine.

Edit: 12 bit is already in the stable version.

[NikosD]

Is there anyone still using a Skylake CPU ?

I tried using a Core i5 6500 with VP9 DXVA2 and LAV filters but it keeps falling back to software decoding.

Is VP9 DXVA2 still usable for Skylake ?

[aufkrawall]

I don't think VP9 was ever supported by Skylake GPU.

[NikosD]

Go back in this thread at around December 2015 to see benchmark results of Yups running Win 10 on Core i7 6700K using LAV filters and DXVA Checker.

[wanezhiling]

https://www.apple.com/macbook-air/specs/

Simultaneously supports full native resolution on the built-in display at millions of colors and:

One external display with 5120-by-2880 resolution at up to 60Hz

Up to two external displays with 4096-by-2304 resolution at up to 60Hz

UHD Graphics 617 (i5-8210Y) is most likely equipped with new Gen10(maybe Gen11, Icelake) display controller which supports higher resolution.

[littleD]

Not sure if that have been mentioned, but after latest win 10 update and installing newest intel drivers, i get HDR to SDR mapping in Movies and TV app. Colors look quite fresh ant not washed out anymore. I was struggling with driver installation but it was worth it. What is strange, now i have three ways to watch HDR content on SDR laptop display: by MPC HC and Madvr, by Tv and Movies app and by MPC HC BE. All three players give bit different output, color saturation and brightness/white level.

[wanezhiling]

much worse than pascal..

only 300 MHz??

[huhn]

300 mhz would be a good sign if it wouldn't be dropping frames.

[Asmodian]

Adaptive? Optimal Power? When I get back I home I will test too.

[NikosD]

Originally Posted by wanezhiling

...much worse than pascal..

only 300 MHz??

Regarding features, the driver still misses H.264 8K.
Regarding speed, VP9 8bit definitely can't much the 38 FHD simultaneously decoded streams advertised for Turing Tesla T4
The decoded dropped frames are too many, but the decoding clock is too low as well.

Maybe someone could download the 8K60fps VP9 clip and try that in benchmark (full speed) mode.

The issue could be just a wrong driver's setting from nVidia.

[nevcairiel]

That youtube video runs perfect on my 2080 Ti, but my GPU never clocks that low because I have 3 screens connected (one of which is 144Hz) - which keeps idle clocks higher. Video Engine load 75%-80%~
Only one or two drops at the start of playback, nothing otherwise.

Its this one, btw: https://www.youtube.com/watch?v=1La4QzGeaaQ (format 272, 8K VP9)

LAV DXVA2 (Native) Decode Performance
Avg 75.6 FPS (didn't DXVA checker use to show min/max fps?)

[NikosD]

Originally Posted by nevcairiel

Its this one, btw: https://www.youtube.com/watch?v=1La4QzGeaaQ (format 272, 8K VP9)

LAV DXVA2 (Native) Decode Performance
Avg 75.6 FPS (didn't DXVA checker use to show min/max fps?)

I have reported the issue of missing min/max fps to DXVA Checker's developer a month ago and he is going to put it again in the next version.
I have a beta in my hands, showing min/max fps.

For VP9 8K60fps clip the average of 76fps is good but not far away of the real-time decoding.

What is the performance of a Pascal (any) card on the same clip ?

[wanezhiling]

1050ti 68fps
uhd620 64fps

[NikosD]

Originally Posted by wanezhiling

1050ti 68fps
uhd620 64fps

A difference of around ~10% could be just the clock, so the VP9 HW decoder of Turing and Pascal is probably the same.
Thanks.

[Zetti]

Microsoft Launches Free AV1 Video Codec for Windows 10

https://news.softpedia.com/news/micr...0-523704.shtml

[NikosD]

To be honest, the main problem of Turing cards and especially 2080 Ti, is not the video decoder performance or drivers.

It's the meaningless selling point of RTX technology, completely useless right now and unfortunately even when games come with RTX support, they are going to run at 60fps only for resolutions of 1080p and below.

What's the point of giving 1500€ to run games at 1080p ?

The value for money of Turing cards is the worst ever for any card I remember of.

And above all these, the failure rate of 2080 Ti cards is unprecedented.

They just die after a few working weeks and a lot of times even the replacement just dies too!

This is simply tragedy...

[Manni]

Originally Posted by NikosD

To be honest, the main problem of Turing cards and especially 2080 Ti, is not the video decoder performance or drivers.

It's the meaningless selling point of RTX technology, completely useless right now and unfortunately even when games come with RTX support, they are going to run at 60fps only for resolutions of 1080p and below.

What's the point of giving 1500€ to run games at 1080p ?

The value for money of Turing cards is the worst ever for any card I remember of.

And above all these, the failure rate of 2080 Ti cards is unprecedented.

They just die after a few working weeks and a lot of times even the replacement just dies too!

This is simply tragedy...

I'm glad I passed on the 2080ti due to the lack of HDMI 2.1 and the 14nm process. Waiting for the next gen happily with my 1080ti in the meantime.

Do you have a link to the info re failure rates? I have no interest in the current gen but I do plan to get the next gen when they offer a HDMI 2.1 model with 7nm process. I agree the price is a rip-off, but given the quality you get with MadVR and the fact that video processors costing three or four times as much don't give that quality, I can still justify putting that kind of money in a GPU. I sure wouldn't if it was only for gaming.

I'm hoping that Madshi will, at some point, exploit the new Tensor Cores in the RTX models. When that happens, it will become even more justified, at least for my use. I certainly won't buy a new GPU without Turing to replace my 1080ti, if only just for that probable MadVR capability to make the most of the new technology in the short/mid term.

EDIT: no worries, found a link: https://www.techradar.com/uk/news/nv...an-they-should
EDIT2: and another one with actual numbers: https://www.digitaltrends.com/comput...unders-issues/
Doesn't seem as bad as you say, especially if you avoid the FE, which I would never buy anyway (I usually buy EVGA for nVida)...

[Zetti]

Is GTX 1100 series still not on the way??

I hope because GTX 1000 series is 2 years old.