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2.8 Understanding How the Camera Manages
Buffered Images
When images are buffered in the camera’s internal memory
The camera’s internal memory is divided between the number of triggers that are configured. For example, if
5 triggers are set, each trigger can use 1/5 of the camera’s internal memory, and if 3 triggers are set, each
trigger can use 1/3 of the camera’s internal memory, etc. See Page 207 for information about the camera’s
internal memory capacity.
For example, when buffering JPEG images at 320
´
240 resolution and standard quality:
Number of triggers
1
2
3
4
5
Maximum number of JPEG images that can be buffered
by each trigger (approximate)
1160
580
385
290
230
When you change settings for a trigger, all images buffered in the internal memory for the selected trigger are
deleted. Additionally, images buffered for other triggers may also be deleted. When configuring a trigger to
buffer or transfer images, it is important to understand how the camera manages buffered images.
All images for the selected trigger are deleted when:
–
You change the settings for a trigger (image buffer frequency, transfer method, transfer settings, etc.)
–
You click [Delete Buffered Images] on the trigger page
All images for all triggers are deleted when:
–
You disable or enable a trigger (see Page 59)
–
You restart the camera (see Page 180)
–
You update the camera’s firmware (see Page 181 and Page 203)
–
You reset the camera to its default settings (see Page 184)
–
You change the date and time setting (see Page 140)
–
You restore settings from a configuration file (see Page 183)
When selecting [No Transfer, Memory Overwrite] for buffering JPEG images using sensor,
alarm, or detection triggers
If you want to configure the camera to buffer pre-trigger and post-trigger images, please note the following
recommended settings when selecting [No Transfer, Memory Overwrite] for buffering JPEG images using
sensor, alarm, or detection triggers.
When buffering JPEG images at 320
´
240 resolution and standard quality:
Number of triggers
1
2
3
4
5
Maximum number of JPEG images that can be buffered
by each trigger (approximate)
(“A”)
1160
580
385
290
230
Recommended maximum number of pre-trigger
images
(“B”)
385
190
125
95
75
Recommended maximum number of post-trigger
images (when the number of pre-trigger images shown
above is set)
(“C”)
390
200
135
100
80
Approximate number of images buffered when using
the above settings
(“D”)
775
390
260
195
155
Note
•
As a general guideline, the recommended maximum number of pre-trigger images is about 1/3 of the
maximum number of images that can be buffered by the trigger.
(
“B”
equals or is less than
“A”
´
1/3, as shown above).
Operating Instructions
79
2.8 Understanding How the Camera Manages Buffered Images
Summary of Contents for BL-C210 Series
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