Here's a tool that helps you capture stills from encoded movies files.
Whatever you have the codec for, the built-in player will play it, and the
built-in camera will capture the still frames for you, quickly and easily.

As more and more folks begin to store and edit their videos on
their PCs, a tool like Capturex
makes a lot of sense. You can speed up the movie, slow it down or pause it.
Captured stills are saved instantly to a directory of your own choosing.
I can see this being useful in corporate training where stills
from training videos can be captured for use in technical documentation. This
one is worth a look is presently under $25.00. Click here
to download a demo.