Forum Post: osd parameters update

hi all. i see in the RDK when we call the function Vcap_setDynamicParamChn() to update the OSD parameters,every time we will set the all the OSD window parameters in the same channel again.so that will be update all osd window

is that ture?

if i want to one of the OSD window rolling,every time we call the Vcap_setDynamicParamChn() ,the other osd window will flash once time.how to just update the special one osd window?