Download a static build for windows from
http://www.ffmpeg.org (hit the downloads tab)
There are heaps of "getting started with ffmpeg on windows" guides on the web. Do some googling as I am not a big windows user.... I mostly work on unix systems (osx or Linux flavors).
One thing I do know, you will want to replace the /dev/null in my example with NUL in windows Cmd. (That bit of the command just pipes the output to nowhere so you don't have to deal with temp files) Apart from that, the previously posted command should work just fine and give you a list of black frames detected.
Good luck,
Michael
