Technical information

AVT GigE camera attributes
AVT GigE Camera and Driver Attributes V1.3.1
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This document is a master document for all AVT GigE camera models and is NOT camera specific
To calculate the required minimum StreamBytesPerSecond setting for a camera
in any image mode, use the following formula:
StreamBytesPerSecond = Height x Width x FrameRate x Bytes per pixel
115,000,000 is the typical data maximum data rate for a GigE port. Beyond this
setting, some network cards will drop packets.
StreamFrameRateConstrain – Boolean – R/W
When TRUE, camera automatically limits frame rate to bandwidth, determined
by StreamBytesPerSecond, to prevent camera buffer overflows and dropped
frames. If FALSE, frame rate not limited to bandwidth – only sensor readout
time. Latter case useful for AcquisitionMode = Recorder, or StreamHoldEnable
= On, as these mode are not bandwidth limited.
StreamHold
For controlling when the camera sends data to the host computer. Normally,
the camera sends data to the host computer immediately after completion of
exposure. Enabling StreamHold delays the transmission of data, storing it in
on-camera memory, until StreamHold is disabled.
This feature can be useful to prevent GigE network flooding in situations where
a large number of cameras connected to a single host computer are capturing a
single event. Using the StreamHold function, each camera will hold the event
image data until the host computer disables StreamHold for each camera in
turn.
StreamHoldCapacity – Uint32 – R
The total number of images that can be stored in camera memory. Used in
AcquisitionMode = Recorder, or StreamHoldEnable = On. Dependent on the
camera internal memory size and TotalBytesPerFrame.
StreamHoldEnable – Enum – R/W
Control on-camera image storage; this control is like a “pause” button for the
image stream.
Note

If host reports occasional dropped frames/packets
reported as StatFramesDropped/ StatPacketsMissed
with an optimized NIC, you may need to decrease this
parameter.
Possible values: TRUE, FALSE Default: TRUE
Units: Frames
On Images remain stored on the camera, and are not transmitted
to the host
Off [Default] The image stream resumes, and any stored images
are sent to the host