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Can you add NTP to Hikvision cameras for precise time

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I have 5 Hikvision cameras. They are set to sync time from a GPS trained NTP server. But the time of each camera apears to be +/- 1 second instead of 1 or 2 milliseconds that is typical of NTP systems.


I assume this is due to the Hikvision's not using NTP on the camera's Linux to condition the camera's clock, but instead just use the NTP protocol to reset the clock. So as a result, the time is always around 1 second error.


So my question is, can NTP software be placed on the camera and run on startup, such that the camera's clock gets conditioned by an external NTP server? And if so, how do you do it?


Thanks in advance.



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