Hey @mrazik
not sure how it was in ffastrans 2015 but i tend to say that mapping whatever input you have to mono tracks is now standard behaviour if you set your encode processor to output mono tracks. Do you see different behaviour? Can you send a minimal example source file and workflow that causes the behaviour?
8 audio channels
Re: 8 audio channels
emcodem, wrapping since 2009 you got the rhyme?