How do caputre mpg picture shots

[neuroman]

I have some movies on my computer and want to be able to capture still shots from them. But every time I attempt it using the "Print Screen" key, it doesn't work. Tips?

[_dave_]

Using PowerDVD to play the files, you can just press SPACE I think for a screenshot. There are no doubt similar options in other programs... what players have you got installed?