I have quite a bit of a problem, and I wonder if anyone else has expirienced same symptoms. I have an H.323 lab environment which consists of one 3515 MCU (12 ports), one Tandberg 1700 MXP HD-video endpoint and one Polycom PVX software endpoint that runs on a PC equipped with Polycom ViaVideo USB camera. There also is a Cisco Unified Videoconferencing Manager 5.6 which has a gatekeeper embedded and runs on a virtual machine. I do NOT use any functions of CUVCM here - it only does the gatekeeper job. All components are plugged into Cisco Catalyst Express 500 24-port switch and operate in the same VLAN and same network addressing space. So practically my lab environment has a LAN speed between all of the components.
Cisco 3515 MCU has an h.323 service configured as HD/SD continuous presence, with top resolution of 720p and max. speed of 1920 Kbits/s. Under "advanced video" settings all codecs are selected with h.264 being the most preferred.
So, theoretically, a videoconference should run real smooth in these conditions.
However, whenever I start a conference by creating it on the MCU and then dialing out to the Tandberg terminal, I get it working but the picture is smooth only if the person is very calm, and doesn't move practically at all. Any movement causes a lot of artefacts to appear on the picture, and the quality drops below any reasonable value. I also noticed that I have average video jitter of about 60ms, and I can't get the idea of how can that be in a separate LAN environment.
Is there anything that can be done to fix this?