ffmpeg installation in Ubuntu

It’s important to remove any traces of the fake ffmpeg that Ubuntu unfortunately packages. You know you have it because if you run ffmpeg you get a vindictive message from former developers who left the project.

• Here is the info: askubuntu.com/questions/313217/install-latest-ffmpeg-for-all-users-in-debina-ubuntu

The official installation guide seems to be maintained regularly:

• ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide

Some problems and solutions are here:

• ubuntuforums.org/showthread.php?t=786095