HDR encoding

[mparade]

No, Hybrid doesn't support decoding anything above 2048x2048 atm. through DGDecNV.
(VP7 cards should be able to decode HEVC Main and Main 10 profile; VP8 cards should be able to handle HEVC Main 12; VP8 cards should also support 8k resolutions iirc.)
-> might come in the future isn't supported atm. by Hybrid (probably when I get my hands on a newer card, atm. I use a Geforce GTX 980 ti, which doesn't support hevc)

With this feauture missing from Hybrid, what does the program use for decoding 4K (main, main10, main12) sources?
This kind of current software decoding can have the same quality compared to DGDecNV (or has nothing to do with it)?

I have some 4K material to reencode but don't want to degrade the quality during decoding. In the past I always used DGDecNV with excellent results.

P.S. I am going to borrow you one of my GTX 10xx Pascal cards to be able to use DGDecNV for decoding...