Hello again
Ok, i've searching for a solution of this problem and, well, there isn't an easy one (of course)...
but I found this thread:
http://shoutbox.menthix.net/showthread.php?tid=70944&pid=781202
Saying that, using a sniffer, I could find all INVITE messages with a Application-GUID of 2A23868E-B45F-401d-B8B0-1E16B774A5B7
but, with my tests with this sniffer, I realized that every time a click on the "show my webcam" button, I got a INVITE message with a Application-GUID (EUF-GUID) of {4BD96FC0-AB17-4425-A14A-439185962DC8}
so what i'm trying to do is:
1) get an INVITE message with EUF-GUID of {4BD96FC0-AB17-4425-A14A-439185962DC8} (this mean the webcam started);
2) get the SessionID of the above message;
3) if I get an BYE message whit the same SessionID of the INVITE message, it means the webcam stopped;
i'm still testing here but I post result as soon as I get them, ok? any comments on my "solution"???
thanks!