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IDProjectCategoryView StatusLast Update
0000662madVRbugpublic2021-02-15 11:21
Reportergoraelec Assigned To 
PriorityhighSeveritymajorReproducibilityalways
Status newResolutionopen 
Summary0000662: non-DXVA chroma upscaling produces severe banding
DescriptionI first noticed this while using the builds from https://www.avsforum.com/threads/improving-madvr-hdr-to-sdr-mapping-for-projector.2954506/page-486#post-60235595 . I started getting severe banding whenever I switched to one of those builds. I tried this again today with 123b and got the same banding. This is what I did to troubleshoot:
1. Called up debug menu with Ctrl+J on 123b and noted down what I saw there
2. Reverted to the latest stable build and did the same

The first difference I noticed was that the stable build showed `chroma > DXVA` while 123b showed `chroma > Jinc AR` which is what I actually set up in `chroma upscaling`. I reverted back to the latest stable build and unchecked `use DXVA for chroma upscaling...` in `trade quality for performance` options and reproduced the same banding I saw on 123b. So there are two issues here, I think:
1. non-DXVA chroma upscaling produces severe banding
2. builds 122-123b (these are the only ones I used) don't follow `use DXVA for chroma upscaling...` settings
TagsNo tags attached.
madVR Version0.92.17
Media Player (with version info)MPC-HC 1.9.8.148
Splitter (with version info)LAV 0.74.1.92-git
Decoder (with version info)LAV 0.74.1.92-git
DecodingDXVA2 Native
Deinterlacingnone (progressive)
DXVA2 Scaling Activeno
Aero / Desktop Composition<select>
Problem occurs with modeall modes
GPU ManufacturerAMD
GPU ModelVega Frontier Edition
GPU Driver Version20.Q4

Activities

goraelec

2021-02-05 01:12

reporter   ~0002785

To add, I tried all possible options besides Jinc AR and got the same banding on all of them

madshi

2021-02-08 18:57

administrator   ~0002786

It's probably DXVA Native decoding which causes this (?). Have you tried DXVA Copyback or Software decoding?

goraelec

2021-02-15 09:35

reporter   ~0002790

I don't have any banding when DVXA is turned on, actually. Copyback doesn't make a difference

madshi

2021-02-15 11:21

administrator   ~0002791

Not sure what to say, nobody else has reported a similar issue. Maybe reverting to the madVR default settings helps, by double clicking the "restore default settings.bat" batch file?

Issue History

Date Modified Username Field Change
2021-02-05 01:11 goraelec New Issue
2021-02-05 01:12 goraelec Note Added: 0002785
2021-02-08 18:57 madshi Note Added: 0002786
2021-02-15 09:35 goraelec Note Added: 0002790
2021-02-15 11:21 madshi Note Added: 0002791