Im fairly sure power DVD does it. Only problem is that capturing stills from digital video rarely gets very good quality results. The theory is that digital video uses whats called key frames. The compression has a true full image, known a a key frame, and the following five or so frames only record the changes to the key frame. Then you get another key frame followed by another five or so intermediate frames. This results in still images being rather blured. The ratio of key frames to intermediate is dependant on how it is encoded.
Slow moving video with little change to the key frames is fairly successfull but anything fast moving will just blur.
Keyframes come every (FPS * 10) on average.