How to print screen a video?

How to print screen a video?
Cuz everytime watch video then when you print screen the image will become black.

upz

yeah... how?
seems only .avi files can do it.. most file types cant

AVI i also cannot.

fraps can do the job Mr. Green

Fraps? Programme?

Set the Hardware Acceleration to the lowest.

if u use mplayerc (aka media player classic) u can go to file > save image. it should work fine.