@d5775927 If your camera is Dahua, if you use Home Assistant, there is already a Dahua camera integration. First screenshot shows a dahua cam as a HA device, with different IVS as sensors. You can use these to trigger your zigbee valve. No need to have NVR in the middle.
@AlwaysSomething I have Optiplex SFF, I bought this card because it's half height https://www.amazon.com/gp/product/B087R7V2Q6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Good performance for CPAI, including LPR.