View Issue Details

IDProjectCategoryView StatusLast Update
0000681madVRbugpublic2022-04-10 21:05
ReporterDMU Assigned Tomadshi  
Status assignedResolutionopen 
Summary0000681: The render time in test builds is much higher than in the release version in HDR passthrough mode.
DescriptionSee FinalStep.
TagsNo tags attached.
madVR Versionv0.92.17
Media Player (with version info)mpc-hc 1.9.19
Splitter (with version info)LAV
Decoder (with version info)LAV
DecodingDXVA2 Copyback
Deinterlacingnone (progressive)
DXVA2 Scaling Activeno
Aero / Desktop CompositionOff
Problem occurs with modewindowed mode
GPU ManufacturerAMD
GPU ModelAPU R5 4650G
GPU Driver Versionlast



2022-02-23 22:15


madVR_FinalStep.png (2,726,728 bytes)


2022-04-09 04:31

reporter   ~0002872

Is this just debug vs. release build differences? Or are the test builds using typical optimizations?

Often test builds include debug symbols and lack some optimizations to make debugging issues easier. Though those wouldn't be for performance testing or validation.


2022-04-09 09:39

administrator   ~0002875

That is surprising. Does it still happen if you turn smoothMotion off? I wonder if it's related. I usually test with it off.


2022-04-10 08:20

reporter   ~0002878

Checked. Disabling SM does not solve the issue.
release_test.png (2,632,266 bytes)


2022-04-10 10:05

administrator   ~0002879

Just to be safe, can you double check if it's still FinalStep which is consuming the extra time?


2022-04-10 16:25

reporter   ~0002880

Rechecked twice. It's definitely FinalStep.
But I noticed one oddity - with the ShowRenderSteps option, the time difference is not so significant, but still there.


2022-04-10 17:15

administrator   ~0002881

Ok, thanks. Which dithering method are you using? Dithering is performed as part of FinalStep, so I wonder if that could be a factor here. If you're using error diffusion, can you try using a different method instead, to see if that removes or reduces the higher rendering time?


2022-04-10 18:00

reporter   ~0002882

In all cases I used Ordered Dithering.
Disabling dithering does not solve the issue. 2ms vs 8ms in the FinalStep.
dith.png (108,456 bytes)   
dith.png (108,456 bytes)   


2022-04-10 21:05

administrator   ~0002883

Ok. I'll try to reproduce it here. I'm extremely busy atm, though, so it might take a while.

Issue History

Date Modified Username Field Change
2022-02-23 22:15 DMU New Issue
2022-02-23 22:15 DMU File Added: madVR_FinalStep.png
2022-04-09 04:31 EternalStudent07 Note Added: 0002872
2022-04-09 09:39 madshi Note Added: 0002875
2022-04-10 08:20 DMU Note Added: 0002878
2022-04-10 08:20 DMU File Added: release_test.png
2022-04-10 10:05 madshi Note Added: 0002879
2022-04-10 16:25 DMU Note Added: 0002880
2022-04-10 16:25 DMU File Added: release_VS_test_FinalStep.png
2022-04-10 17:15 madshi Note Added: 0002881
2022-04-10 18:00 DMU Note Added: 0002882
2022-04-10 18:00 DMU File Added: dith.png
2022-04-10 21:05 madshi Note Added: 0002883
2022-04-10 21:05 madshi Assigned To => madshi
2022-04-10 21:05 madshi Status new => assigned