Dosent adobe image ready coupled with Quicktime pro do it? Think it creates a series of layers from the individual frames? I read about it in After effects with photoshop by Jeff Foster (had to give it back to the library other wise I would have had a proper look)

You could then create an action to move the layer into a new image and then use the batch process to output each frame, altought you would then need to remname each file in sequence some how, although there might be a way of doing it in image ready so you dont have tyo do the action?????