Video to Pictures

I would like to create a group photograph of people that can be found in my parents' wedding videos. The videos are about an hour long in total and I can appreciate that not all of the people in the videos will have their face on. I know there are various different software that then take even angled faces and turn them into full faces. I would like to create a group wedding picture from the video content. I do have individual pictures that I can also scan in and send to you. I would need this done in two weeks' time.