change video resolution in sip mid call

Question

I want to change video resolution in sip mid call based on network speed.I tried a lot but failed One of my trials is i reinvite second person with updated resolution code is

NgnAVSession session= NgnAVSession.getSession(new NgnPredicate<NgnAVSession>() {

                @Override
                public boolean apply(NgnAVSession session) {
                    // TODO Auto-generated method stub
                    return session.isActive();
                }


            });
            //INgnConfigurationService configurationService = Engine.getInstance().getConfigurationService();
            MediaSessionMgr.defaultsSetPrefVideoSize(tmedia_pref_video_size_t.tmedia_pref_video_size_720p);
            //session.getMediaSessionMgr().defaultsSetPrefVideoSize(tmedia_pref_video_size_t.tmedia_pref_video_size_720p);

        session.makeCall(remoteUri);

but it does not work also.

Answer 1

To be SIP specific - Please add the SDP from the Re-INVITE and the Client response in this case. This should help you understand why the rates don't change mid call.

As for the change staying for the next calls seems to application specific and not a protocol behavior.