So I've been struggling for a while to get Rtmpdump to build for Android on windows.
If anyone wants to try it I've uploaded the binaries here
https://github.com/S74ck3r/rtmpdump/downloads
It's built from the latest code, again with no patches or additions. Don't know if it works properly as I haven't tested it yet but it does appear to load.
Shared library version not working.. will look at it later but don't bother downloading that one. --Update, rename the shared library to "librtmp." (without the quotes but with the fullstop at the end that's the important bit) and it will work.
I'm not responsible if it bricks your phone...
Richard