I often like to capture still shots from video, but the picture quality, while alright at best, is often poor due to the nature of how the video is recorded. The interlaced video is very often not lined up, giving blurry edges to the subject (as in the picture to the right). I've come up with a workaround, however, thats works fairly decently. By selecting half of the picture, every other scanned row at a time, and scooting it over to put it in sync with the other half, you end up with an ok shot.
To get a glimpse of how I do it, just follow the scrolling sequence to the right. Have fun!