If you are looking for an all singing all dancing media player which will play just about any file format and you want it to be open source, then look no further than VLC: a free download available from www.videolan.org .
Long known to the web wise, VLC is the ultimate multimedia application. So, what is so special about this player?
Well it can chew up and spit out just about any sort of media file: MPEG, DivX, OGG, DVD - in fact it would be quicker to list the file formats it does not support.
The technology is open source and is constantly being updated by developers in 20 different countries.
There are also different versions of VLC for pretty much every operating system around. All your multimedia problems solved with a quick download and it is free