Anyway to find out what codec a file uses?

[aphex]

I created a .mpg and someone is having trouble viewing it.. He wants to know what codec i used, but i have no idea (i used ffmpeg).

How can i find out?

 

[sswingle]

Gspot

Edit, looks like it only does AVI...

 

[Nohr]

The GSpot 2.52 beta has MPEG support.