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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0000524||madVR||bug||public||2017-11-15 23:46||2017-11-16 23:31|
|Platform||Windows||OS||Windows||OS Version||8.1 and 10|
|Summary||0000524: Render queue empties when outputting 720p60 at 1080p to 4K TV|
|Description||I have a 4K TV connected to a GTX 1080 that I've been trying to output 720p60 without any dropped frames. I thought I could output 1080p to the TV just like I output to a 1080p TV which works fine at NGU very high chroma and doubling. However when I output this to the 4K TV forcing 1080p60 resolution the render queue keeps emptying on a cycle. If the render queue is 16 it occurs about once a minute. The GPU load is around 50% with these settings, frame drops should start around 80%. If I drop the settings to bilinear image/chroma the issue persists at 10% GPU load. I also tried bilinear image/chroma with a GTX 1060, GPU load was 30% and the render queue kept emptying. |
If I output the same 720p60 videos at 4K I have to drop the settings to bicubic chroma, lanczos image but it works without any frame drops and the render queue doesn't come close to emptying.
|Steps To Reproduce||1. Play 720p60 on a 4K TV at 1080p60|
2. Monitor the render queue
|Tags||No tags attached.|
|Media Player (with version info)||Potplayer 1.7.4353|
|Splitter (with version info)||LAV 70.2|
|Decoder (with version info)||LAV 70.2|
|DXVA2 Scaling Active||no|
|Aero / Desktop Composition||On|
|Problem occurs with mode||all modes|
|GPU Model||GTX 1080|
|GPU Driver Version||388.13|
|Which Nvidia power setting are you using? Try Adaptive.|
I was using max performance, the issue persists with adaptive. PCIE power saving is disabled in windows power options as well.
I attempted to get 720p60 working at 4k. At first I set all bilinear scaling and about half the frames dropped. I discovered error diffusion is at least 70% gpu load on a GTX 1080 at 4k. After switching to order dithering I'm able to use NGU sharp medium chroma/image, ssim 1d 100% without frame drops.
On a 1080p+GTX 1060 setup error diffusion is a 5% gpu load penalty, very light.
|2017-11-15 23:46||turbojet||New Issue|
|2017-11-16 10:00||madshi||Note Added: 0001924|
|2017-11-16 23:31||turbojet||Note Added: 0001926|
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