Taking Screencaps

So i want to take a lot of screencaps from each episode of a boxset i have, doing this by hand will take forever so i was wondering is there any software that will do this automatically for me?

How do you do a screencap anyway?

Screen capture. All I do on my pc dvd player is press the camera/frame grab option while the film/tv episode is running. On your dvd player there should be an option somewhere. For example, on mine there is an icon of a camera to just click whenever I see a frame I want grabbed, and it saves it into whatever folder you want to put it in.

Thanks