Yes, Movie Maker can do it. It's a bit of work, though. Pull your AVI in to WMM. Go to Tools, Options, Advanced tab. Set the picture duration down to a half second. Use more or less depending on the speed of the original and what you want as a final product. Scroll to the starting frame of your choice. Go to Tools, Take Picture from Preview... A pop up will ask you where to save it. Start numbering like 00001 or whatever system you choose to use. (They have to be in Linux order. Windows looks at this system differently.) Go to Play, Next Frame or L then back to Tools and save the next one. These will be JPEGs but you can convert them to PNGs with Paint.net or similar software. Hope this helps!
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