printing a thumbnail summary of DV video tape

Many years ago, I used Canopus Raptor DV which did this (though it would produce pages and pages for one tape). I now have a laptop and used Exsate DV capture. This is arguably better as I can 'screen capture' a page full at a time but it takes a lot of time to process these as its a dozen screens per tape. However, it crashes at end of a LP tape capture so loses all the thumbnails.

Can anyone tell me if there is a simple (& freebie) way to produce a thumbnail print of DV tape content?
Someone must have wanted to do this before now! I have tried out various capture progs to no avail so thought it better, now, to ask.

Canopius ran a fast playback routine and captured every change of scene but I cannot find the software CD now (a long time ago) and it may not run with other h/w ayway.

I'd be grateful for any leads or ideas.

Paul