Dario, if you want the highest possible software deinterlacing, have a look at QTGMC from Avisynth, which is a free scripting system for video.
I am using the tool Staxrip which has GUI frontend for Avisynth scripts and brings all the tools necessary. Thanks to FFMPEG you can even export into a ProRes mov on your PC.
https://www.videohelp.com/software/StaxRip
It takes a bit time to understand how things work, but the results are well worth it.
I have done some deinterlacing tests with R17b6, it's ok but can't touch QTGMC quality.