Axis Q7414 User Manual

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30AXIS Q7414 - EventsPre-trigger and Post-trigger buffersThis function is very useful when checking to see what happened immediately before and/or after a trigger, for example, 30seconds 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 thebox 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 the 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 andindividual 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 oftime for the uploaded recording, in seconds, minutes or hours, or for as long as the trigger is active. Finally, set the desiredimage frequency to the maximum (the maximum available) or to a specified frame rate. The frame rate will be the bestpossible, but might not be as high as specified, especially if uploading via a slow connection.Scheduled EventA 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 Priority (High, Normal or Low).4. Set the Activation Time parameters (24h clock) for the event - start on Sundays at 13.00 with a duration of 12hours.5. Set the When Activated... parameters, (what the video encoder would do at the specified time) for example, senduploaded 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 tamperingThe camera tampering application generates an alarm whenever the camera is repositioned, or when the lens is covered,sprayed, or severely defocused.The Minimum duration parameter sets the minimum tampering period, that is an alarm will not be triggered until this periodhas elapsed, even if the tampering conditions are otherwise met. This can help prevent false alarms for known conditions thataffect 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 thissituation from other situations where the same effect is seen, such as when lighting conditions change.When the Alarm for dark images parameter is enabled, alarms are generated for all cases where the lights are either dimmedor 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.