Doom9's Forum - View Single Post - madVR - high quality video renderer (GPU assisted)

huhn · 9th December 2018, 10:15

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.

9th December 2018, 10:15	#53884 \| Link
huhn Registered User Join Date: Oct 2012 Posts: 7,926	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.