So, this would have then only value if build on the system or if there where distro packages. _tobtoht told me it is only viable with 6.8 and a custom v4l backend (for linux, for that I was wondering about win/macOS (I don't use anymore since years, or in the meanwhile more then a decade :D ). So I will doit know for 5.15, and after it got updated to 6.8 I will see, how to get it compiled for release, too. (Expect to get in the meanwile also more proficient

with the build system).