Bogdan Mariesan wrote:
Hi Andy,
Sorry for the fuss, my email client added the http part... that was
not intended there.
OK, maybe from an ffmpeg users pov it would be best to test on a lan
without the hole punching code just to see if that part works.
On the client side I am using Java to run the FFMpeg process and in
Android using IJKPlayer to play the stream. I've added pastebin links
since it keeps the code well formatted. Client side -
http://pastebin.com/bkajPR5Q Server used to achieve the UDP hole
punching - http://pastebin.com/vEGdw3QF Android -
http://pastebin.com/gpUUQyjG
Missing / on line 38.
I am far too lazy to check if the ports are reversed properly etc - If I
were doing this I would be looking at tcpdumps to check.
UDP hole punching is the mechanism through which you can establish
P2P connections when your devices are behind routers, secure NATs
etc. where a direct connection between the devices would be
impossible. This can be achieved by having both devices connect to a
public ip server via UDP. When the connection is to the server is
done, on both devices public and private UDP ports are open by the
NAT. Then a direct connection can be established using the public IPs
of the routers of the two devices by specifying the public and
private(local) ports on both sides. Hope i made it clear.
So basically I'm opening a P2P connection between the two devices.
The IPs reported by my UDP hole punching server are below (i've
changed them a bit for security reasons):
OK, maybe it should work "normally" though I don't think it would be
robust with multiple clients behind the same nat as the ffmpeg server is
a different connection from the middle server so the sports could in
theory get changed.
In the UK I think 3g/4g providers do carrier grade nat - I don't know
if/how that would affect things.
My laptop running FFMpeg which sits behind a router 5.2.66.19-56190
My Android phone using 3G/4G 109.55.132.187-52547
And the log generated by FFMpeg is: http://pastebin.com/fyzyk9X1
Hope it makes more sense now.
Kind regards, Bogdan
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