ChalkBored said:http://en.wikipedia.org/wiki/Microsoft_Media_Server
Answer's UNIXgod's question and the original post.
MPlayer now has the ability to use FFmpeg's network code to access streams. Use% mplayer [url=ffmpeg://rtsp://example.invalid/stream.mov]ffmpeg://rtsp://example.invalid/stream.mov[/url]
syntax to try it.