Thanks manolito for all the research. Frankly speaking I would not spend too much time to fix that mismatch between Mediainfo and FFmpeg. I don't know which program is handling properly the recent 8 channels audio tracks. Right now I prefer to stand by the window and see if the 2 apps come to a convergence. If not, I will second FFmpeg and for 2.9.0 release (2025 maybe?
) I can develop a new media info parser from FFprobe output (xml or json based).
Meanwhile I will add a new entry in the FAQ audio section, to suggest to use MKVtoolnix in case of "problematic" 8 channels tracks.
Bye