Using the following command you can reset the result of People counting via SDK: http://<IP_address>/rcp.xml?command=0x0b4a&type=P_OCTET&direction=WRITE&num=1
First recommendation would be to configure the mode for IVA as a trigger, setting IVA as Profile 1 for “trigger off” and IVA as silent for “trigger on”.
You can call desired pre-positions (PTZ) of Bosch IP cameras by using OSRD protocol or BiCom protocol. Please check this aticle to find some examples and detailed explanation.