Installing FFmpeg

Installing FFmpeg in Windows

1. Download a static build from here.
2. Use 7-Zip to unpack it in the folder of your choice.
3. Open a command prompt with administrator's rights.
4. Run the command:
   setx /M PATH "path\to\ffmpeg\bin;%PATH%"
   Be sure to alter the command so that path\to reflects the folder path from your root to ffmpeg\bin.
   (Here's another explanation with pictures.)

Installing FFmpeg in OS X

Here are a couple of links to instructions:
http://www.renevolution.com/ffmpeg/2013/03/16/how-to-install-ffmpeg-on-mac-os-x.html
http://www.idiotinside.com/2016/05/01/ffmpeg-mac-os-x/
http://macappstore.org/ffmpeg/

Installing FFmpeg in Ubuntu

sudo add-apt-repository ppa:mc3man/trusty-media  
sudo apt-get update  
sudo apt-get install ffmpeg  
sudo apt-get install frei0r-plugins  

Helpful links for Ubuntu users:
http://www.webupd8.org/2014/11/ffmpeg-returns-to-official-ubuntu.html
http://linuxg.net/how-to-install-ffmpeg-2-6-1-on-ubuntu-15-04-ubuntu-14-10-ubuntu-14-04-and-derivative-systems/
http://ffmpeg.org/download.html
http://askubuntu.com/questions/432542/is-ffmpeg-missing-from-the-official-repositories-in-14-04