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AXIS 250S User's Manual
• Pre-trigger recording time up to- The AXIS 250S is capable of saving recorded sequences
that originate from the time immediately preceding the trigger. This can be very useful
when checking to see what happened to cause the trigger. The part of the buffer not used
for pre-trigger recording is automatically used for post-trigger recording. This is useful in
ensuring that there is no video lost during the short time it takes to complete the
connection to the FTP upload server.
Notes:
•Exactly how much pre-trigger recording will be produced depends on the bit rate setting. Using
no audio and a bit rate of 0.25 Mbps, the maximum duration for a pre-trigger recording will be
approximately 60 seconds.
•When the event is triggered, the pre-trigger recording will be uploaded first. The rest of the
recording will then follow, at a frame rate dictated by prevailing conditions. This is to say that
the frame rate will be the best possible, but not necessarily as high as specified, especially if
bandwidth is limited.
•A high-quality video stream will occupy more of the internal memory and thus shorten the dura-
tion of the recording. As pre- and post-trigger FTP uploads have a higher priority, if the network
load is heavy the quality of Live view may suffer.
•When the event is triggered, the pre-trigger recording will be uploaded first. The rest of the
recording will then follow, although prevailing conditions may result in some images being
dropped.
•Note that as the pre- and post-trigger buffer is always of a fixed size - the more pre-trigger
recording is specified, the less will be available for post-trigger recording.
•In the case of overlapping events, the buffer will be locked by the first event as this has higher
priority. The buffer will be available to the second event only when no longer required by the
first event.
• Base file name - This name will be used for all of the files saved. If suffixes are also used,
the file name will take the form filename_suffix.
• Add suffix - Add either a date/time suffix, a sequence number (with or without a
maximum value), or select Overwrite. This last option will save one file only and will
constantly overwrite it, whereas using sequential numbering with a maximum will
overwrite the first file as soon as the last file is written.
• Activate output port - This box must be checked to enable the use of the output port. The port
is used to control external equipment.
• Keep active during event - This option allows external equipment to be run/controlled for
the entire duration of the event. This might be necessary to e.g. keep extra lighting on
while saving/uploading a video sequence.
• Keep active for - Specify a fixed length of time the port will be active for.
Operating the AXIS 250S
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