Installing ffmpeg on Mac OS X - fluent-ffmpeg/node-fluent-ffmpeg GitHub Wiki

Using Homebrew

The simplest way to install ffmpeg on Mac OS X is with Homebrew.

Once you have Homebrew installed install ffmpeg from the Terminal with the following:

brew install ffmpeg

You're done!

Homebrew installs ffmpeg with many of the common codecs including H.264.

BEWARE: On OSX this blew away Python2 version in /usr/local and installed Python3.