ffmpeg -i „zdroj.mkv“ -map 0 -c:v copy -c:a eac3 -b:a 768k -c:s copy „vystup.mkv“
ffmpeg -i zdroj.4k.mkv -vf scale=1920:1080 vystup.1080.mkv
https://developer.dolby.com/technology/dolby-audio/dolby-digital-plus/
Zdroj: https://www.denon.com/cs-cz/blog/best-movie-scenes-to-test-your-home-cinema-setup