Jerky Camera Control On A viewstation FX

[bbaum]

I have an install with a Crestron controlling a Viewstation FX via RS232, When the camera is pan tilted or zoomed, the motion is jerky. It does it both on the built in camera on the FX and the camera on input 4 (External Sony EVI-D100) I seem to remember a problem years ago like this with the macro that Crestron had published, but I thought they had fixed it.

Appreciate any help,

Brad

[Vlife995]

Hi Brad,

Did you ever find a solution to the jerky camera action on your polycon/crestron system? Please use email below for reply.

Regards

Paul
Perth, Western Australia
email: pt@arach.net.au

[tom9933]

I don’t know specifically about the Creston module works but, the Polycom API on the FX/4000 supports two different commands when controlling the camera. Depending on how the module is telling the codec to move you might see some jerkiness. If you check the API manual you will get a better description but here is a brief summary. For what its worth on the last system I did I ignored the AMX module because it was so out of date and wrote the code from scratch.
The commands to move the camera are in the following format
Camera near/far 1/2/3/4/5 source/move/stop/tracking
So to move the camera you would do something like camera near 1 move up discrete, to move a single step or
Camera near 1 move up continuous which will move the camera until it either reaches a limit or you send camera near 1 stop.

The way I set my system up is that the first click of the arrow in my gui sends a discrete move and holding down the arrow sends the continuous/stop commands. This should give you the ability to move the camera in steps if needed, but otherwise move quickly. As I recall you will still get a bit of jerkiness when doing FECC but locally the camera should move relatively smoothly. In most of our systems we actually hook the cameras directly to the control system and only use the Polycom commands to move the far site camera.