Did you fixed new opencv build or it failed in new and exiting ways? :)

Not yet. I want to get the Andrea's testing of HDR understood and tested/verified foremost but keep getting sidetracked.

I also hoped to see x265 updated to git snapshot (so we can retire my x265 patch, that probably does not work as hoped on gcc/aarch64) but this one will require some user testing ....

Good idea - I will put this on my never-ending list (I still really want to get lcms2 tested -- a very little testing resulted in not compiling, but more on that later hopefully when I have something concrete).