Thank you for your support, unfortunately I have yet tried
Replay Media Catcher which didn't worked correctly and that's why i was looking at
rtmpdump.
@Ed999 I have the last (2.3) release of rtmp dump on window 7 pro 64 bits with Microsoft's .NET framework 4 installed, enough ram and an adequate processor. I though with rtmp dump explorer, it would be easier and unnecessary to run a complicated command. Indeed I understood that rtmpsrv would display directly the command line i needed to run then with rtmpdump.exe.
I'll try your .bat command and keep you informed but i have to specify i would like to record live stream...
so how will i be able to start/stop recording whenever i want?
... Moreover is it neccesary to
change [127.0.0.1 cp59009.edgefcs.net]
by an other address (i don't know how to find) since it's a ustream broadcast?
At the present time i use a try version of Microsoft Expression Encoder 4 Screen Capture, it's quite efficient but i think the video could be more accurate or fluent with a "direct" recording.