I am not sure if the library referenced is supposed to be ffmpeg, but before I was getting this error when using "./install-all.sh"
Installing fmmpeg...
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 162 100 162 0 0 593 0 --:--:-- --:--:-- --:--:-- 595
xz: (stdin): File format not recognized
tar: Child returned status 1
tar: Error is not recoverable: exiting now
Failed to install, the package probably does not exist.
I am not sure if the library referenced is supposed to be ffmpeg, but before I was getting this error when using "./install-all.sh"
After changing to ffmpeg it the script succeeded.