Avisynth is Windows only. (gave up on supporting it through wine on Linux&MacOS, too much hassle)
Vapoursynth works fine on Linux and MacOS.
I wrote scripts for Ubuntu to build and install Vapoursynth and the plugins Hybrid uses (see: https://github.com/Selur/hybrid-vapoursynth-addon).
The scripts Hybrid uses are available under: https://github.com/Selur/VapoursynthScriptsInHybrid/
Otherwise the user is required to:
a. build/install Vapoursynth
b. build/install the Vapoursynth filters Hybrid uses
c. let Hybrid know it should look for Vapoursynth (misc.ini + vapoursynth=true see: https://forum.selur.net/thread-10.html)
I checked the source code, there is no code in Hybrid which would disable the "useToneMap"-button.
My guess is that this is some incompatiblity between Qt and the theme you use. Try whether changing the style of Hybrid (Config->View->Style) does change whether the button is greyed out or not.
Cu Selur
Vapoursynth works fine on Linux and MacOS.
I wrote scripts for Ubuntu to build and install Vapoursynth and the plugins Hybrid uses (see: https://github.com/Selur/hybrid-vapoursynth-addon).
The scripts Hybrid uses are available under: https://github.com/Selur/VapoursynthScriptsInHybrid/
Otherwise the user is required to:
a. build/install Vapoursynth
b. build/install the Vapoursynth filters Hybrid uses
c. let Hybrid know it should look for Vapoursynth (misc.ini + vapoursynth=true see: https://forum.selur.net/thread-10.html)
I checked the source code, there is no code in Hybrid which would disable the "useToneMap"-button.
My guess is that this is some incompatiblity between Qt and the theme you use. Try whether changing the style of Hybrid (Config->View->Style) does change whether the button is greyed out or not.
Cu Selur