Downloading a video or audio file from the internet and then playing it on
your computer is often fraught with difficulties. Mostly, Windows will play
the file just fine. Frequently, though, you'll receive an error message about
Windows not having the correct codec installed and thus being enable to play
your file. Most codecs can be downloaded for free but you first need to know
what codec you need. That's where this free utility comes in handy. Just
point it to a media file and it will tell you exactly how it is encoded. Once
you know that it is usually easy to locate and download the codec you need to
play the file.
http://www.techsupportalert.com/content/free-tool-deciphers-video-and-audio-encoding-methods.htm
