Re: [ros-users] uvc_camera not publishing width and height o…

Thanks Eric--this is great! Using dynamic_reconfigure with the Logitech
9000, I see the expected effect with all parameters except exposure
which generates the error:

setting control 9a0901
current value of 9a0901 is 3
unable to set control
: Input/output error
[ERROR] [1292729915.173487152]: Problem setting exposure. Exception was
unable to set control

but setting absolute exposure works fine so no problem there. The one
glitch I ran into was in setting the width and/or height in
dynamic_reconfigure; because you can only set one at a time, as soon as
one is set, uvc_cam warns:

[ WARN] [1292730153.471431256]: Reconfigure callback failed with
exception pixel format unavailable:

and then image_view freezes. If you then continue to set the other
dimension in dynamic_reconfigure, it does not unfreeze the image.
Restarting the uvc_cam node *does* unfreeze image_view and picks up the
new resolution, as long as you don't have width and height hard coded in
the launch file.

Will test more tomorrow.

--patrick