ubutun "Package 'ffmpeg' has no installation candidate" 如何解决？

Question

Package ffmpeg is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'ffmpeg' has no installation candidate

Answer 1

http://askubuntu.com/questions/432542/is-ffmpeg-missing-from-the-official-repositories-in-14-04