- Get ffmpegX from the above URL. It's a pretty useful tool, because the ffmpeg synatx isn't quite easy to handle.
- Control-click on the ffmpegX application, choose Show Package Contents from the pop-up menu, and navigate into Resources.
- Copy ffmpeg to /usr/local/bin.
- Execute the following in Terminal (as admin):
sudo chown root:wheel /usr/local/bin/ffmpeg sudo chmod 755 /usr/local/bin/ffmpeg
[robg adds: There may be other ways to get the binary as well, but this one seems quite simple.]