Resolving IP Camera / VMS Time Sync Problems

Author: Ethan Ace, Published on Nov 07, 2011

One issue which IP surveillance systems must address is syncing of time between cameras and the VMS in a surveillance network. In our experience, and as discussed in a recent lively discussion in our LinkedIn group, this is often overlooked, yet it is an extremely important issue. Cameras and recorders being out of sync could very well result in evidentiary video being thrown out in court. More commonly and mundane, out of synch cameras can result in 'lost' video and headaches for both users and integrators.

In this update, we look at the key issues including Network Time Protocol servers, GPS time appliances, and how IP cameras and VMS servers handle timing.

How ******* ****** ****

********* ************* ** ** ******* ****** *** ******'* ******** ***** in ********* ****. *************, ***** *** *** *******: ****** *** automatic ********** **** ********.

******:**** ****** ******** *** **** ** ***** *** ******* **** in *** ******'* *** *********. ** ****** *** ******* *****, but **** ** ********** ********. ** **** *****, *** ****** entry *** ** ************ *** * "**** ** **" ******, which **** *** **** ** *** ****** ** *** **** of *** *********** *** **** ** ********* ** ****.

*********** * ******* ** *******' ******** **** ** **** ** manage, ****** **** ****** *********, ** ****** ***** ** ***** recommended. ** ***- ** *****-***** *******, ****** ***** ** *** of *** ********. ******* ** * ****** ***** ******* *** much **** ** ******** ******. ***** ** **** * ****** risk **** * ****** **** ** ****** ** *********** ***.

*********: **** ******* ******* *** ** ************ ** * ******* **** protocol (***) ******, ******* ** ** * ****** ****** **** as ****.***, ** * ******* ******, **** ** *** ****** clock ** ********* **** ******. ************* ******* ************* *** ******** benefits. *** ***, ** **** ** ******** ** ****** *** cameras ** *** ******. **** *** **** ****** ** *** up, *** ******* ** *********.

**** ***********, ** ******* *** ******* *** **** *** **** time. ** ****** ** ***** **** ** **** *****, **** time **** *** **** ** ** *****. ** ** **** better ** **** *** ******* *** ** ** *:**** **** it ** ** **** *:** **** ** ** ** **** one *** *:**, ******* *** *:**, *** ******* *** *:**. If *** ****** ***** * ***** ******** ** ***, *** the ******* ****** *** ******** ** ******* ****** ******* ***, there's * *********** **** ***** *** ** ************ ** *****.

How ********* ****** **********

**** ** ******* ****** **** ***********, ********* *** ****** ********** differently ** ****. *** *** **** ****** **** * *** may ****** **** *** ** ******** ****** **** *******, ** using *** ******'* *********.

******** ** ******* ** ******* **** ** ****** ****. *** VMS ****** ***** *** **** ** ******** **** ***** ** video. **** ****** ****** **** ******* ***** *** ** ****, since *** ****** ** ***** *** *** ***** ** **** camera. *******, ** **** ***** *******, ** ******* **** **** latency, ** *** **** ****** *** ****** **** *** ****** to ****** **** ****** **** ******* ******, ***** **** ***** video ** ** *** ** ****. ** **** *****, **** shouldn't ** * ***** **** ** ****. ** ***** ***** less **** * ******, ****** *** ******* ** ********* **** latency. *******, ***** ****** ** ***** ** ***** **** **** may *****.

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Software *********

** ***** ** *********** *******, **** **** ** *** ****** from ***** ** **** *** ******* ****. ******** *******, **** as ****.*** *** ***.*** *** ** ****, *** **** ******** that *** ******* ** ** * ******* **** ****** ** the ********, **** ***** ****** *** **** *************. **** ***** regard **** ** ** ************ ******** **** ** ***** *******, and ****** ** *** ******* ******** ** ***** ******* *******. There *** ** ***** *** ***** ** ***** **** *** be ************. *** ***** ****** ** *** ********. 

** ****** ** ***** **** ******* ** ******* ** ******* as * **** ******. *******, ***** *** **** ****** **** doing **. *****, ** ***** ** *** *** ***** ****** as ** ************* **** ******, ***** ******** *** ******* ********. **** ***** **** *** ** *********** **** **** *******. Second, ** *******, ******* ******* **** **** * ****** ****** once *** ****. ** ***** ** ****** ****, ***** **** once ***** **** *** ********.

** ******** **** *******, ***** ***** *** ******* **** **** created. *** ******* ****** *********. ***** ******** **** ** *****, ***** *** **** ****** set ********* **********, **** ** * ****** **** ** ****** interval. *** ***** ** *** ** ****** *** ** *** as * ****** ******, ****. 

Hardware *********

** ********** ***** **'* *********** ** *** * ****** **** server ** ** ******** ******, ********* ******** ******* *****. 

***-*****:*** ******* ***** **** ** **** ******** ****, *** ** not **** ** **** ***** ** *** ******** ** ******** it **** ** *** ******, *** ****** ****** *** ** the **** ******. ***** ****** ******** **** **** *** **********, which ***** **** ******* ***** ******* **** ** **** ** the ***. **** ** ************ ** *** ** *** ****:

  • ******-*******: *** *** ******* ** ******* ****** *** ********, ** a ****** **** * ***** **** ** *** ***. *** obvious ************ ** ***** ****** ** **** **** **** ************ access ** * ******** ******** ******. ** **** *****, **** may ** **** ** **** **.
  • ********: ***** ***** **** ******** ******** ** *** ****** ******. A ******** *** ****** *****, ** ****-*******, ******* **** ***** network ********* ** *** ******. *** ******* ** ******* ******* the ********, ****** ****- ** ****-*******. **** ****** *** ******* above ***** ********* ***** *** ******** *** ********** ** **********. However, **** ** ** ******* ***** *******, ***** ******** ***** and ***** *** ** ********* *** ****** ** *********.

*** ****** *** ********* ** ******* ***** ******.********'* *******($***-*** ******) ** * ****** ******, *** **** ** ******** window *******. *** ****** ******* ** ******* ** ***-*******, ** it *** ** ******** ******* ******* **** ** * ***** power ******, ****** *** ***********. *** **** ******* ********* **** precise ************ *** ** ******** *******, * ****** ** ************* are *********, **** ************,***********, ***********. ***** **** ** ***** *** ******** *-** *** ***** of ***** *******, *******, *** *** ******** **** **** **** absolutely *********.

******* ****-*****: ****** **** ******* ***** ****** ***** **** **** an *** ****** *** **** *********, *** **** **** ** the **** ******* ** *** ******. *** ************ ** ********* NTP ******* ** **** **** *****, ***** ** *** ******** need ** ** ******, ***** **** ** ************ ** **** users. *********, ****** ****** ******* **** **** *** ******* *** only **** **** ***** ** * ****** ***** ***'* **** to **** ** ******** ****** **** * ****** **** ******.

 

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