I get better results using my CPU for SVP and just recently using Nvidia CUVID via LAV than using OpenCL for SVP and no HW acceleration for video. Even when using my CPU for everything I still have plenty of headroom for SVP's 3c profile.
As far as using madVR, I do use it quite alot actually with with Lanzcos for all chroma and Jinc 3 for Luma upscaling and Lanzcos for Luma downscaling. What I'm trying to do is to get SVP to work with Jan Willem32's renderer regardless if madVR is superior or not.
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