This program works very well - freeware and paid version for commercial use,,

http://www.topazlabs.com

Topaz Moment!(TM) is a software that captures high
quality mega-pixel pictures from videos. Tired of noisy
and fussy image from video? By using multiple neighbor
frames, Topaz Moment!(MT) enhance captured image so
that it is cleaner, sharper, and with higher resolution
than any other software do. This is the tool for capturing
the priceless moments in your video clips and turning
them into photo-quality prints quickly and easily.