Hi all again.
A few days before I wrote to the list asking if someone has a similar problem that the one I had. This problem was that when I start a video/audio session between 2 UAs using Mediaproxy, audio was perfect but video was horrible. Nobody tells me anything.
After checking that there was not a problem of my network (drops or something like that in switches or routers), I decided to try Rtpproxy with video support instead of Mediaproxy. I don't know why but with rtpproxy, video goes PERFECT with exactly the same SER.CFG (using the correct options) that I used for Mediaproxy.
So if someone find a similar problem... try it !
Bye:
Kiko