ffmpeg giving error on launch in Mac OS X Lion 10.7.1
Try using:

$ brew update &amp;&amp; brew install `brew outdated` &amp;&amp; brew cleanup


This script will also help you track down changes on libraries that are needed.

If you those don't work try:

$ brew doctor (check your setup for common problems)
$ brew missing (to check installed packages for missing deps)


brew doctor checks your setup for common problems, brew missing checks installed packages for missing deps.

You can always start fresh (which should take care of all the problems):

$ brew uninstall --force `brew deps ffmpeg`
$ brew install ffmpeg


then

$ brew update