[vlc-devel] [PATCH] live555: fix the subtitles issue

Gilles Chanteperdrix gilles.chanteperdrix at xenomai.org
Mon Dec 30 15:59:42 CET 2013

On 12/30/2013 03:57 PM, Rémi Denis-Courmont wrote:
> Le lundi 30 décembre 2013, 15:55:21 Gilles Chanteperdrix a écrit :
>> The client sends "dummy" packets after the SETUP and before the PLAY to
>> the server RTP ports.
> So what port number does the client put in the SETUP request? How does it 
> ensure that said port number will match the source port of the dummy packet?
> On most NAT devices, this will not work.
These dummy packets are sent after the SETUP. The server uses the NAT
ports instead of the ports in the SETUP. Again, this works, because this
is the way classical UDP NAT works.


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