User`s manual

VPort 2141 Video Encoder User’s Manual Advanced Applications
5-3
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Downloading Event-triggered Snapshots
There are 12 video image files for the video channel of three stages: pre-alarm, the moment when
triggered, and post-alarm. Only the snapshots captured by the last event are preserved.
Administrators and users can use FTP or URL to get the saved snapshots. They can also be
browsed from the application page under system configuration.
Getting triggered snapshots by URL
/cgi-bin/ imagebuf.cgi? [?<param>=<value>]
param value Description
cam 1 Video 1
2 Video 2
3 Video 3
4 Video 4
bufcnt -7 snapshot before event (oldest)
-6 snapshot before event
-5 snapshot before event
-4 snapshot before event
-3 snapshot before event
-2 snapshot before event
-1 snapshot before event
0 snapshot upon event