ubuntu fix collection

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys yourkeyt

find /path/to/fonts-master -type f -name "*.ttf" -exec mv {} /path/to/put/fonts \;

mpv --lavfi-complex="[vid1][vid2]hstack[vo];[aid1][aid2]amix[ao]" nonstable.mp4 --external-file=stable.mp4