I'm trying to rip an RM file that is being delivered via rtsp. The flag has something like this:

<video src="rtsp://stream.url.net:8080/clipname.rm?.userid=12345.password=23456" clip-begin="npt=01:32:22"/>

Is there a way to just grab from that point without grabbing the entire video?

I can pull the entire video with net transport. All I want is this block.