Configuring the Camera
AW00101510000
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Basler IP Fixed Dome Cameras
Stream AOI Height
- As shown in, sets the height (in pixels) of the stream AOI. When you adjust
this setting, you will notice that it must be changed in certain fixed increments.
*
*
You can also use the
Stream AOI Editor
to set this parameter, and any changes you make to the
AOI parameter settings on the
Stream
tab will be reflected on the
Stream AOI Editor
.
Output Scaling
- Sets the amount that captured images will be rescaled before they are encoded
and transmitted in the stream.
1:1
= No rescaling.
1:2
= Rescale to 1/2 size.
1:4
= Rescale to 1/4 size.
1:8
= Rescale to 1/8 size.
Note that increasing the level of output scaling will decrease the workload on the processor in the
camera.
Frame Rate Scaling
- Sets the ratio of captured images to encoded images.
1:1
= Every image captured by the camera’s sensor will be encoded and streamed.
1:2
= Every second image captured by the camera’s sensor will be encoded and streamed.
1:4
= Every fourth image captured by the camera’s sensor will be encoded and streamed.
1:8
= Every eighth image captured by the camera’s sensor will be encoded and streamed.
Note that increasing the level of frame rate scaling will decrease the bandwidth used to stream
images from the camera to a device.
Note that if the
Encoder Type
parameter is set to
JPEG (triggered)
, the
Frame Rate Scaling
parameter setting will be fixed at
1:1
.
GOP Length [ms]
- If the
Encoder Type
parameter is set to H.264 or MPEG4, then the
GOP
Length
parameter will set the time between I-frames in milliseconds.
In an H.264 or an MPEG stream, the camera transmits periodic I-frames and transmits several
P-frames between each I-frame. I-frames carry complete information for a captured image.
P-frames only carry information about the areas of the image that have changed since the last
I-frame was transmitted. The time between the transmission of I-frames is determined by the
GOP
Length
parameter. Increasing the time between I-frames (i.e., the GOP length) will increase the
efficiency of the encoder. But be aware that increasing the GOP length also increases the latency
when you start an image stream because the decoder in the receiving device must wait longer for
the initial I-frames.
Live Buffer Size [kbyte]
- Sets the size (in kilobytes) of the live buffer for the stream. The live buffer
is a ring buffer that stores the last
n
captured images for the stream (
n
depends on the size of the
images being encoded and the size of the buffer).
Alarm Buffer Size [kbyte]
- Sets the size (in kilobytes) of the alarm buffer for the stream. Normally,
the alarm buffer is simply a ring buffer that stores the last
n
captured images for the stream (
n
depends on the size of the images being encoded and the size of the buffer). But when an alarm
condition is declared, the alarm buffer will only continue to buffer post alarm images until the portion
