Axis Q7414 User Manual download pdf (Page 30)

AXIS Q7414 - Events

Pre-trigger and Post-trigger buffers

This function is very useful when checking to see what happened immediately before and/or after a trigger, for example, 30

seconds before and/or after a door was opened. Check the Save stream checkbox under Event Types > Add Triggered... >

When Triggered... to view the options. All uploaded images are JPEG images.

Include pre-trigger buffer

- images stored internally in the server from the time immediately preceding the trigger. Check the

box to enable the pre-trigger buffer, enter the desired length of time and specify the required image frequency.

Include post-trigger buffer

- contains images from the time immediately after the trigger. Configure as for pre-trigger.

Notes

• Pre-trigger and Post-trigger buffers will be lost if the connection to t

he event server fails.

• The maximum length of the pre-/post-buffer depends on the video image size and selected frame rate.

• If the pre- or post-buffer is too large for the video encoder’s internal memory,

the frame rate is reduced and

individual images may be missing. If this occurs, an entry is created in the unit's log file.

Continue image upload (unbuffered) -

enables the upload of video images for a fixed length of time. Specify the length of

time for the uploaded recording, in seconds, minutes or hours, or for as long as the trigger is active. Finally, set the desired

image frequency to the maximum (the maximum available) or to a specified frame rate. The frame rate will be the best

possible, but might not be as high as specified, especially if uploading via a slow connection.

Scheduled Event

A Scheduled event can be activated at preset times, in a repeating pattern on selected weekdays.

Configuration example:

1. Click Add scheduled... on the Event Types page.

2. Enter a descriptive Name for

the event, such as Scheduled e-mail upload.

3. Set the Prio

rity (High, Normal or Low).

4. Set the Ac

tivation Time parameters (24h clock) for the event - start on Sundays at 13.00 with a duration of 12

hours.

5. Set the Wh

en Activated... parameters, (what the video encoder would do at the specified time) for example, send

uploaded images to an e-mail address.

6. Click OK to save the Event

in the Event Types list.

See the online help

for descriptions of each available option.

Camera tampering

The camera tampering application generates an alarm whenever the camera is repositioned, or when the lens is covered,

sprayed, or severely defocused.

The Min

imum duration parameter sets the minimum tampering period, that is an alarm will not be triggered until this period

has elapsed, even if the tampering conditions are otherwise met. This can help prevent false alarms for known conditions that

affect the image.

If the camera lens is sprayed or covered so that the camera live

view becomes dark, it will not be possible to distinguish this

situation from other situations where the same effect is seen, such as when lighting conditions change.

When the Alar

m for dark images parameter is enabled, alarms are generated for all cases where the lights are either dimmed

or turned off, or if the lens is sprayed, covered, or rendered severely out of focus. If not enabled, no alarm will be sent.

After you define these settings, click Save.

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Axis Q7414 User Manual Page 30

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