Hi Patrick,

Were you using a launch file like the one you posted, only with the
size and fps values changed? And were you restarting the node,
complete with a new invocation of `roslaunch`, after updating the
parameters?

My copy of uvc_camera is responding to all of those launchfile
changes, and I'm getting lots of different working modes with a
QuickCam Pro 9000. There is no dynamic_reconfigure support in this
node, though.

 - Ken