www.makemkv.com

Thanks for your replies!

ldd output as follows:

[feedc0de@raspberrypi3-00 ~]$ ldd /usr/bin/makemkv
linux-vdso.so.1 (0x0000ffff8b205000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x0000ffff891f0000)
libQt5Widgets.so.5 => /usr/lib/libQt5Widgets.so.5 (0x0000ffff88a80000)
libQt5Gui.so.5 => /usr ...

I installed makemkv from the archlinux AUR on my raspberrypi3 ( https://aur.archlinux.org/packages/makemkv ), and I launched makemkv from the start menu.

I was greeted with a NO_ANSWER_FROM_MAKEMKVCON

So I tried the cmdline only tool instead, which works like a charm:

[feedc0de@raspberrypi3-00 ...