My understanding based on Wireshark analysis is that the signaling works
(also the recipent phone is displaying the video frame before accepting the
call), also the calling phone send video (i see that also via Wireshark)
but the recipent phone doesn't get any video from the Asterisk before the
call.

2018-04-09 17:02 GMT+02:00 Joshua Colp <jc...@digium.com>:

> On Mon, Apr 9, 2018, at 11:53 AM, Benjamin Marty wrote:
> > Yes, media is flowing through Asterisk because both client's are behind
> > different NAT's.
>
> This doesn't answer the question of what is ACTUALLY happening in the
> scenario you describe which is very important.
>
> > Do I need to do something special in the Call Flow? Or anything
> additional
> > to the pjsip.conf?
>
> The "rtp_symmetric" option as you've used causes Asterisk to send media to
> the source of media, but it requires us to receive media. If we don't
> receive it then we send media to where they've told us to send it, which as
> I've mentioned can be wrong.
>
> --
> Joshua Colp
> Digium, Inc. | Senior Software Developer
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - US
> Check us out at: www.digium.com & www.asterisk.org
>
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