cross platform software to convert video to image sequence I'm looking for a piece of software I'm even sure it exists.
Here's what I would like this software to do:


be free (ideally open source, but free and closed source is also fine)
be cross platform (at least works on Win and OSX, Linux support would be nice)
import a variety of video formats (mov, avi, wmv, mpg, mp4, ogg, flv, 3gp, etc.)
exports an image sequence from the imported video


Any ideas/suggestions ?
Look at ffmpeg. It will run on just about anything and should do what you want, although it might depend on what your source actually is
Something like this should work : 

ffmpeg -i sourcefile.avi -f image2 'img-%03d.jpeg'


(see the image2 section for full reference)