I'd be happy to make you one, but it is literally one line of code after you generate the PDF. I think my commit message for that feature was "PDF -> GIF. I get paid for this!?"

I did a similar thing, actually, to render a successive series of Prawn documents (2-d scenes) into a Quicktime movie. Prawn -> series of pngs -> ffmpeg -> mov. It was a quick-and-dirty hack, but I was surprised by the simplicity.

Yeah, I guess it's easy enough to do on your own if you have RMagick handy. Good point.

RMagick leaks memory like a sieve. I do this in a pair of worker threads that just fire off system calls to the GraphicsMagick command. (Hat tip to HN: I learned about it here and saved 50% on conversion time versus doing it with ImageMagick.)

Ah, interesting. Yeah, I'm certainly aware of RMagick's memory issues, fortunately, haven't had a need for it.