When using the pcastagentd command-line utility to access a remote Mac OS X 10.5 Leopard client's built-in iSight camera over ssh, an alert message about not connecting to the camera may appear.
Make sure a user account is logged in on the client Mac before attempting access to its camera via pcastagentd and ssh. This command should work even if a screensaver is password-protecting the computer.
Note: You can bind to the camera while no user is logged in, but recording will not work unless a user is logged in.