It includes a multimedia player able to play the video even in full screen, to seek precisely in the video, frame by frame, to catch pictures from the video either in bmp or jpeg format.
The image may be easily corrected, in order to respect an aspect ratio of 4x3 or 16x9. ImageGrab is also able to catch automatically a series of images at a scheduled interval.
You may download your copy of ImageGrab
here.