Onvif camera control

Hi Colin (@Colin),
Recently my Onvif Hikvision camera arrived - after 3 months ... - so I wanted to start with my Onvif nodes again. But now I would like to finalize my camera viewer node first, since that can cooperate with the Onvif nodes very well (which allows me to test the Onvif nodes more rapidly). But I'm stuck with the camera viewer node at the moment. So unless somebody can give me a tip to solve/workaround that problem, I'm going have to waste my evenings finding a solution myself. But meanwhile I cannot continue the Onvif nodes ...
Bart