4K hevc CUVID decoding issue

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4K hevc CUVID decoding issue

Post by panto on Tue Feb 21, 2017 6:32 pm


When I watch the 2160p 4K UltraHD x265 HEVC 10bit movie
I got this issue in K-Lite_Codec_Pack_1294_Mega or 1295 update (It happenes in use CUVID H/W)
I use svp 4 to force 60FPs ,K-lite 1294 doesn't lag(only in CUVID setting) ,But It comes up unpredictable broken Fragments

the older version of K-Lite hasn't broken Fragments by CUVID H/W setting ,but it's lag(Divx2 and native either)

thank for your help

panto

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Re: 4K hevc CUVID decoding issue

Post by Admin on Tue Feb 21, 2017 6:43 pm

Which graphics card do you have? It might not support HEVC 10bit hardware acceleration. That is why it is lagging with DXVA2.

The broken fragments is because it is decoding it as 8bit. That is a bug.

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Re: 4K hevc CUVID decoding issue

Post by Admin on Tue Feb 21, 2017 8:16 pm

I have tested with that same file and it plays correctly with CUVID here. So there is no bug. You are probably using an old version of the NVIDIA driver. You need driver version 375.95 or newer for 10bit HEVC decoding to work properly.

You may be able to fix the lagging with this setting:
NVIDIA control panel > Manage 3D settings > Global Settings > Power Management Mode > Select "Adaptive"

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Re: 4K hevc CUVID decoding issue

Post by panto on Wed Feb 22, 2017 12:47 am

I use GTX 1070
driver & graphic cad already support HEVC

thx

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Re: 4K hevc CUVID decoding issue

Post by Admin on Wed Feb 22, 2017 12:32 pm

So the problem is solved now?

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Re: 4K hevc CUVID decoding issue

Post by panto on Wed Feb 22, 2017 3:26 pm

Admin wrote:So the problem is solved now?
no,try every setting I could,still not solved

That only CUVID works smooth in SVP 4 ,but broken Fragments


DXVA 2 dones't broken Fragments,but not smooth in SVP 4
,That's why I need CUVID ,And I use GPU GTX 1070 CPU I7 6700 WIN 10 64bit
Can you try that again in SVP 4? thx for ur helping me

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Re: 4K hevc CUVID decoding issue

Post by Admin on Wed Feb 22, 2017 7:44 pm

I don't use SVP. Please disable SVP and test if things work properly then. Once that works we can focus on getting it to work with SVP enabled.

Which version of the NVIDIA driver do you currently have?

I have prepared optimized settings for NVIDIA. Download this:
nvidiainpspector.rar
Extract it. Then right-click on "import_max_performance.bat" and select Run as Administrator.

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Re: 4K hevc CUVID decoding issue

Post by panto on Fri Feb 24, 2017 8:19 am

Admin wrote:I don't use SVP. Please disable SVP and test if things work properly then. Once that works we can focus on getting it to work with SVP enabled.

Which version of the NVIDIA driver do you currently have?

I have prepared optimized settings for NVIDIA. Download this:
nvidiainpspector.rar
Extract it. Then right-click on "import_max_performance.bat" and select Run as Administrator.
378.66 lastest version,

I just pay $ for SVP 4 PRO , Now IT can work on 4K hevc 10bit smoothly
I guess SVP 4 PRO support 10bit 4K more than FREE version
Finally THANKS your help:D

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Re: 4K hevc CUVID decoding issue

Post by Admin on Fri Feb 24, 2017 4:22 pm

Good to know that there is a performance difference between SVP free and Pro.

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