Guide for rtmpsrv/rtmpsuck

[ertes]

Hi guys, a new user here!
Without losing time, my question:
I always use external software for download RTMP, but now i want to learn the "manual" way
With WireShark i'll search for rtmpt and follow UTP stream. I'll found the rtmp:\\ link, but sometime has a few more "dots":

Example:

rtmp://justintvlivefs.fplive.n.et/justintv2live-live

Instead of

rtmp://justintvlivefs.fplive.net/justintv2live-live

In Wireshark i can find also other parameter like swfUrl, tcUrl etc. but if they has more "dots" it's hard to understand where remove it

Now for what i have understand rtmpsrv/rtmpsuck are used for find other parameter of a RTMP stream, but how?
My host is Windows XP

Thanks for any explaination