> Why "Try to recover HDR colors" doesn't work?
Obviously it works. The picture is over-exposed (which is not good), but if we're talking about colors - they are definitely better.
madVR uses different tone mapping algorithm, so it looks different. And "try to recover HDR colors" does exactly this - it tries to recover colors from 8-bit video. It's not a magic wand.
> What should I do to make SVP4 not to deal with the colors and let madvr do the convert
This's impossible.
Try mpv player instead. It has a good selection of tone mapping algorithms and tuning options, and allows SVP to operate in 10-bit color space.