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Recording Storage and Reduction
AXIS 2460 User’s Manual
52
Approximate Storage Times
The table below shows approximations of: a) the total recording storage time in days and,
b) the number of days until the first frame rate reduction. These are shown as
total/first
reduction
. The basis for the examples is as follows:
• four 40 GB hard disks installed
• a recording frame rate of 1 fps per camera
• recording on 4 cameras from an indoor office scene.
Priority
If the Recording Mode is best explained as a function that reduces the frame rate of
recordings stored in the AXIS 2460, then
Priority
can be described as the means of
controlling the
speed
of the Recording Mode. The higher the priority, the more the
reduction process will be slowed down. The maximum storage time (i.e. the slowest
reduction) for a recording will thus be achieved by setting the Recording Mode to
Extended
Long
and the event’s priority to
Top
.
It is also important to understand that priority is
comparative
, that is, it will only be
relevant when there are recordings that use different priorities. Setting e.g. Top priority for
all
events/recordings would be meaningless.
An event’s Priority is set when creating the event.
Image
Resolution
Modulation
Image
Compression
Image
file size
Storage Time for Recording Mode
NTSC
PAL
Normal Extended
Extended
Long
QCIF (low)
176 x 112
176 x 144
High
3 kB
126/-
268/67
702/11.5
QCIF
176 x 112
176 x 144
Normal
4 kB
94/-
199/50
522/8.5
QCIF
176 x 112
176 x 144
Low
8 kB
45/-
96/24
253/4
CIF (Normal)
352 x 240
352 x 288
High
8 kB
45/-
96/24
253/4
CIF
352 x 240
352 x 288
Normal
13 kB
27/-
57/14
149/2.5
CIF
352 x 240
352 x 288
Low
17 kB
20/-
42/10
110/2
4CIF (High)
704 x 480
704 x 576
High
24 kB
13/-
28/7
73/1
4CIF
704 x 480
704 x 576
Normal
36 kB
7.5/-
16/4
43/0.5
4CIF
704 x 480
704 x 576
Low
61 kB
3.5/-
7/1.5
18/0.3
Содержание 2460
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