Geek-N-Out

Gspot codec identifier will tell you what codec is used by a video (regardless if you can play it) and if you have the codec installed. Nice for troubleshooting.

Scenario: I had an avi that would play in VLC but would not import into Movie Maker.  This told me about the DX50 that I needed, plugged it into google and downloaded it from the codec’s home page @ http://www.divx.com/divx/

Another codec identifier is http://avicodec.duby.info/  Haven’t tried it.