EnGenius EDS6255 User Manual page 123

Event Recording Stream Type: H.264 (1920x1080) or H.264 (640x360)
Video Length: the maximum video length of time per file
Detectors Pre-event Buffer: the length of pre-event time (1~5 seconds)
Record Duration: the length of recording time when alarm is triggered.
Note:
If setting to 30 seconds, the camera will keep recording for 30 seconds when event is triggered. In this case,
Buffer Duration Until Next Event
if the Video Length is 10 seconds, then 3 files will be generated for single instance of event. If Video Length is 30 seconds, then only 1 file will
be generated. Please note that pre-event buffer will extend the length of the video clip for the chosen extra length of time.
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