Hikvision Analytics Questions

Hi does anyone have any experience on the Hikvision Analytics I have a customer who has 3 stores that we have installed Hikvision IP in and a further 3 stores that are older analogue systems that we have been talking to them about upgrading to IP. They are interested in the people counting aspect of analytics and Hikvision in their corporate blurb talk about it although I suspect it is only using their series 4 cameras. Do I just need the newer cameras and can still use the older but IP NVR's any comments or experience welcome

Cheers Mike

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