i have a problem with PTZ camera. I'm using a canon VCC4 on my pioneer 2dx and i'd like that
this camera can center a green blob: so if blob is on left of FOV, camera
rotate in counterclockwise and viceversa if blob is on right of FOV.
This is my simple code:

for (i=0 ; i< blobfinder->blobs_count; i++)
green = (blobfinder->blobs[i].color&color) >> 8;
if (green != 0)
if (blobfinder->blobs[i].x < blobfinder->width/2 )
playerc_ptz_set(ptz, ptz->pan+0.1 , 0 ,ptz->zoom );
playerc_ptz_set(ptz,ptz->pan-0.1 , 0, ptz->zoom);

But i get this warning message when "playerc_ptz_set" is executed :
"warning : Unhandled message for driver device=16777343:7000:8:0 type=2
subtype=1 len=20"
Why ???
Nevertheless my camera can rotate but i have noted shaking while my robot
move why ???

thanks in advance