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Old 8th December 2018, 20:59   #53881  |  Link
huhn
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is a panoramic lens something like an anamorphic lens?
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Old 8th December 2018, 22:58   #53882  |  Link
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Folks,
Watching 23.976fps UHD movie with a Win10 system with Nvidia GTX1060 6GB driver 388.13 on a FHD SDR display. It results into 8ms rendering times using JINC everywhere ( plus: scale chroma separately in the trade section ). HDR to SDR pixel shader math checked. CRU applied with 23.976Hz from Nvidia. Windows 1803 version.
The playback gets choppy and frame drops occur in certain scenes. It looks to me as a performance problem. What could be the culprit?
Thanks
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Last edited by Plutotype; 9th December 2018 at 08:46.
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Old 9th December 2018, 02:26   #53883  |  Link
mzso
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Quote:
Originally Posted by Warner306 View Post
Nope, that should be the fastest. Did you check scale chroma separately under trade quality for performance?
Quote:
Originally Posted by nevcairiel View Post
The fastest custom algorithm is Bilinear, which might still be slower on low-end GPUs because it uses the shaders, while DXVA2 scaling can use a dedicated scaler unit (if present) - but you are stuck with its quality.

You can try various trade quality options, as Warner mentioned already "scale chroma seperately" can often help a whole bunch.
Thanks for the tip. But won't this affect upscaling also?

Too bad DXVA2 produces such horrible aliasing artifacts.
I guess you're right about the scaler unit because GPU usage drops to idle. Too bad quality was not a factor in its design...
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Old 9th December 2018, 10:15   #53884  |  Link
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madVR has different settings for up and downscaling so this should only affect downscaling until you are upscaling over the target resolution.

on low end hardware switching the hardware decoder could result in a speed boost too.

DXVA native with default setting will disable "scale chroma separately..." and will slow any kind image downscale making them 3 times slower.
so you have to untick "use DXVA chroma upscale when doing native DXVA decoding" but this cost performance too because madVR has first to undo the DXVA scaling.

so you can use D3D11 decode which only adds an interop which may or may not be faster.

and you can test DXVA copyback which doesn't have a interop but more data is transported which cost processing power too.

DXVA scaling doesn't get alot of love here that chroma problem with nvidia clearly doesn't help.
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Old 9th December 2018, 10:38   #53885  |  Link
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Quote:
Originally Posted by huhn View Post
is a panoramic lens something like an anamorphic lens?
Hi,
No anamorfic lens used.
Side madvr : I need a cropping top-bottom to see content perfectly inscribed.
Once a 16:9 film is played I only need an option to inscribe the 16:9 frame in the center of my 21:9 screen.
In this case it's substantially a downsizing.

Side OS: I'm already ok because the function of the nvidia control panel draw perfectly the desktop inside my 21:9 screen.

So I need settings only side madvr.

Every 21:9 users without anamorfic lens need those feature... Infact my Lumagen radiance have then.

Hoping madvr does.

The problems in my test seems to be related to the way madvr refers to the nvidia drawing of the desktop.
Madvr thinks to have a standard 16:9 desktop.... But in my case is not real... I've changed it into 21:9....



Let me know. Thank you
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Old 9th December 2018, 11:01   #53886  |  Link
huhn
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this feature is already present. it can even be used with lens memory on some projectors.

you go to devices-> click on "your projector name" select digital projector -> screen config -> define visible screen area by cropping masked borders.

for 2160 it should be top bottom -~257. if these numbers are wrong i'm pretty sure you will find the correct ones.
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Old 9th December 2018, 13:14   #53887  |  Link
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Quote:
Originally Posted by Plutotype View Post
Watching 23.976fps UHD on a FHD SDR display results into 8ms rendering times. The playback gets choppy and frame drops occur in certain scenes.
Open the OSD and watch the queues do when that problem happens.
If the decoder queue goes low it's a source file read/video decoding problem. Close background programs that may put increased stress on your storage device/increase the queue size/switch to another decoder (D3D11 native is a good option for UHD).
If the render queue goes low it's a GPU problem. Watch the clocks and GPU usage with a monitoring tool (GPU-Z or Windows Task Manager) during playback.
If present queue goes low it could be another program trying to display 3D at the same time and hurting presentation (if you're using windowed mode).
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Old 9th December 2018, 15:47   #53888  |  Link
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Originally Posted by mzso View Post
Thanks for the tip. But won't this affect upscaling also?

Too bad DXVA2 produces such horrible aliasing artifacts.
I guess you're right about the scaler unit because GPU usage drops to idle. Too bad quality was not a factor in its design...
It shouldn't. But you can also create a profile so this only applies to 2160p content.
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Old 9th December 2018, 15:53   #53889  |  Link
Warner306
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Quote:
Originally Posted by Plutotype View Post
Folks,
Watching 23.976fps UHD movie with a Win10 system with Nvidia GTX1060 6GB driver 388.13 on a FHD SDR display. It results into 8ms rendering times using JINC everywhere ( plus: scale chroma separately in the trade section ). HDR to SDR pixel shader math checked. CRU applied with 23.976Hz from Nvidia. Windows 1803 version.
The playback gets choppy and frame drops occur in certain scenes. It looks to me as a performance problem. What could be the culprit?
Thanks
Network latency maybe? Is the decoder empty when this happens?

Check Control Panel -> Network and Internet -> View network status and tasks.

Click on the active connection and see what it says for Speed. Should say 1.0 Gbps.

You can also test your network speed with this program: https://download.cnet.com/LAN-Speed-...-10908738.html

You need Write access to the media folder to complete the test.
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Old 9th December 2018, 21:20   #53890  |  Link
Plutotype
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Thanks eL Filou/Warner306
The issue was simplier than anything else...I have accidentally unclicked HW accelerated decoding by GPU. CPU was decoding HEVC content, but of course struggled.
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Old 9th December 2018, 23:40   #53891  |  Link
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Hi just bought now a gtx 1070ti. Does Somebody have experience with this card. Coming from a gtx 960 4g and didn't update the driver for along time. Which driver works best for the 1070ti with win 10 64bit. Also any recommendations on settings. Ngu sharp should be possible I think maybe exact the same as for the gtx 1080.
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Old 9th December 2018, 23:55   #53892  |  Link
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385.28 is still the best option unfortunately. Has anyone posted the issues surrounding the newer versions on the nvidia forum? It's been a year.
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Old 10th December 2018, 09:07   #53893  |  Link
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Yes 385.28 seams to be the best driver.
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Last edited by Betroz; 11th December 2018 at 10:17.
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Old 10th December 2018, 12:57   #53894  |  Link
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Quote:
Originally Posted by mzso View Post
I guess you're right about the scaler unit because GPU usage drops to idle. Too bad quality was not a factor in its design...
What GPU are we talking about? Even my "old" mobile GT650m (kepler) could playback (via CPU) uhd hdr content using moderate settings.
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Old 10th December 2018, 18:39   #53895  |  Link
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What GPU are we talking about? Even my "old" mobile GT650m (kepler) could playback (via CPU) uhd hdr content using moderate settings.
GTS450.

(Via CPU I assume you mean decoding.)
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Old 11th December 2018, 11:40   #53896  |  Link
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Quote:
Originally Posted by mzso View Post
(Via CPU I assume you mean decoding.)
That's correct.

Quote:
Originally Posted by mzso View Post
GTS450
Oh, sh*t It's even older than mine (prev gen Fermi), but: it's a desktop GPU!
You can try out these ones as well for 4k hdr content, along with the "scale chroma seperately" setting:
- enable 1 more in trade performance: the 1 below "scale chroma seperately" setting (maybe it's called gamut mapping)
-- this one will screw up the colors, but it helps performance
- disable "highlight recovery" in hdr menu under your display (it's really taxing otherwise)
- enable crop black bars: that will help with wide-screen content a lot (but not with fullscreen ones)
- dithering: ordered

I think this time you should be able to use at least bicubic scalers for both luma and chroma.
If it's working then try to disable the above set gamut mapping setting in trade performance and see what happens.

Btw: I also "had to" buy a new PC, just because of the new HDR algorithm.
@madshi, take a look what you've done!
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Last edited by chros; 11th December 2018 at 11:48.
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Old 11th December 2018, 11:59   #53897  |  Link
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Question:

I use MPC-HC, LAV Filters and madVR to play programs on my HTPC.

I have Asperger and, from time to time, get some weird ideas in my head. One of the is to run CCleaner (I am on Windows 7) before I play a program with madVR - as to "clear" everything else before I play a program.

Does doing that actually affect anything in terms of the picture (quality) with MPC-HC/madVR or is this just another one of my ideas (that doesn't have an anchor in reality)?

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Old 11th December 2018, 12:26   #53898  |  Link
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Its not going to affect anything. In truth, using tools like CCleaner is usually a bad idea in general.
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Old 11th December 2018, 14:51   #53899  |  Link
mzso
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Quote:
Originally Posted by chros View Post
That's correct.


Oh, sh*t It's even older than mine (prev gen Fermi), but: it's a desktop GPU!
You can try out these ones as well for 4k hdr content, along with the "scale chroma seperately" setting:
- enable 1 more in trade performance: the 1 below "scale chroma seperately" setting (maybe it's called gamut mapping)
-- this one will screw up the colors, but it helps performance
- disable "highlight recovery" in hdr menu under your display (it's really taxing otherwise)
- enable crop black bars: that will help with wide-screen content a lot (but not with fullscreen ones)
- dithering: ordered

I think this time you should be able to use at least bicubic scalers for both luma and chroma.
If it's working then try to disable the above set gamut mapping setting in trade performance and see what happens.
Thanks for the tips.
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Old 11th December 2018, 14:56   #53900  |  Link
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Its not going to affect anything. In truth, using tools like CCleaner is usually a bad idea in general.
How come?
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