http://imagej.273.s1.nabble.com/automated-grabbing-of-frames-tp3705032p3705033.html
You may try virtual dub(also an open source) for the same.
> Dear All,
>
> I have some movie clips on DV tape. I would like to extract sequential
> frames and save them to my hard drive (as .tif or .jpg files) for future
> image processing. I've used a number of commercial software packages
> (iMovie, Ulead's equivalent) to grab individual frames but I would like to
> automate this process. I would like to grab from the movie up to 100
> frames
> and save to a folder.
>
> I would be very grateful if anyone has any suggestions concerning the
> import
> and analysis of DV movies with ImageJ.
>
> Many thanks in advance, John
>
>
>
> -------------------
> John Bradley
> Scientist, Morphology
> Eyetech Pharmaceuticals, Inc.
> Eyetech Research Center
> 35 Hartwell Avenue
> Lexington, MA. 02421-3102
> Tel. (781) 259-7055
> Fax: (781) 676-7757
>
[hidden email]
> www.eyetech.com <
http://www.eyetech.com>