madshi bug tracker

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IDProjectCategoryView StatusDate SubmittedLast Update
0000175madVRbugpublic2014-03-07 18:442014-03-08 15:23
Reporterweb2312 
Assigned Tomadshi 
PrioritynormalSeverityminorReproducibilityalways
StatusclosedResolutionfixed 
PlatformOSOS Version
Summary0000175: Banding appears if bitdepth is set to '7 bit'
DescriptionThis problem does not occur in previous version (0.87.4)

Banding apppears regardless of dithering algorithm if bitdepth is set to '7bit'.

See the comparison below
(Both with identical settings. No 3dlut, no overlay mode and no artifact removal)
http://screenshotcomparison.com/comparison/65645 [^]

Set dithering algorithm to 'None', then take a screenshot of it.
I found that the grayscale tracking around value 106~117 is choppy.
As shown below
http://i.imgur.com/mllKXB5.png [^]
(Shouldn't it be 0-2-4-...-106-108-110-112-114-116-...-254 ?)


Test image: http://www.lagom.nl/lcd-test/img/gradient-h.png [^]
Steps To Reproduce1. Use mpc-hc to play the "test image".
2. Set "the native display bitdepth is" option in madVR to '7 bit'.
3. Banding appears near the center of the image.
TagsNo tags attached.
madVR Version0.87.6
Media Player (with version info)MPC-HC 1.6.7.7069
Splitter (with version info)LAV Filters 0.56.0
Decoder (with version info)Generate Still Video
DecodingSoftware
Deinterlacingnone (progressive)
DXVA2 Scaling Activeno
Aero / Desktop CompositionOn
Problem occurs with modeall modes
GPU ManufacturerNVidia
GPU ModelGeforce GTX 660
GPU Driver Version327.23
Attached Files

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-  Notes
(0000482)
madshi (administrator)
2014-03-08 15:23

Thanks for bringing this to my attention. This problem was caused by several different small things adding up to noticeable problems. This should all be fixed in the next build. For your interest, here's a test build with the fixes already included:

http://madshi.net/madVRlinearLightDither2.rar [^]

- Issue History
Date Modified Username Field Change
2014-03-07 18:44 web2312 New Issue
2014-03-08 11:17 madshi Assigned To => madshi
2014-03-08 11:17 madshi Status new => assigned
2014-03-08 15:23 madshi Note Added: 0000482
2014-03-08 15:23 madshi Status assigned => closed
2014-03-08 15:23 madshi Resolution open => fixed


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