This is using rtmp
I have not tried it on a desktop. If you get it to work, please post a test report. I have not tried the technique below, though it seems like it couild work.
rtmpdump -v -r "rtmp://ip-address/app-name/streamname" -o - | "vlc" -
There’s also references to mplayer
This plug-in will show a live preview over Wi-Fi into a web browser.