Effects of time adjusted backward - Security Center 5.6

Security Center User Guide 5.6

series
Security Center 5.6
revised_modified
2019-10-09

When time is adjusted backward, it changes from DST to EST.

Before 2:00 AM, Security Center uses the DST (UTC-4), while starting from 2:00 AM, it uses the EST (UTC-5), as illustrated below.
  DST Time change EST
Local time 12:00 AM 1:00 AM 2:00 AM = 1:00 AM 2:00 AM 3:00 AM
Offset (hours) -4 -4 -5 -5 -5
UTC 4:00 AM 5:00 AM 6:00 AM 7:00 AM 8:00 AM
Due to the time being adjusted backward, the following behaviors can be observed when playing back or exporting archives:
  • The time jumps back by one hour in the timeline. At 1:59:59 AM, the time displayed returns to 1:00:00 AM.
  • The end time of a video sequence can be earlier than the start time.
  • Exporting archives between 1:00 AM and 2:00 AM always include an additional hour of video. For example, when exporting archives from 1:50 AM to 2:00 AM, the exported sequence will include 1 hour and 10 minutes of video instead of the 10 minutes expected, because the query is made from 5:50 AM to 7:00 AM UTC.
If you do not want to see the time jumping back by one hour during video playback, or if you want to export video without the additional one-hour period, you must configure Security Desk to use UTC. After the sequence is exported, you can revert to the previous time zone to view the sequence relatively to your local time reference.