Understanding Red5 rtmp

[compsci]

Hello all,

I just want to understand the way Red5 works. When making a connection i've seen something like this:

client_nc.connect("rmtp://localhost/firstapp");

1) The refference to "firstapp" - is this a java file?

2) When connected, in the actionscript i see now reference to the folder which the user will save their recorded streams to. How is the folder to save to determined?

Thanks for any replies