RTP blocked by NAT/router

[developprograms]

I was wondering if there is another way to stream rtp that won't have it be blocked by a router. i am wanting to stream using the vlc media player to a java desktop application, but am not able to because the stream gets blocked by most all routers.

is there another format that I could stream and still be able to display it in a java desktop app?

Any ideas would be greatly appreciated.

[Rémi Denis-Courmont]

HTTP, but it's not very suited for realtime streaming.