Stream Hold - GigE VA Series User Manual

9.6

Stream Hold

VA GigE camera provides Stream Hold feature for controlling the transmission of data.
Normally, the camera transmits frame data to the host computer immediately after completing the exposure.
Enabling the Stream Hold feature delays the transmission of data, storing it in the camera's volatile memory
until the Stream Hold feature is disabled.
This feature is especially useful to prevent flooding in Gigabit Ethernet network where multiple cameras are
connected to a single host computer and capture a single event. Using the Stream Hold feature, each camera
will hold the image data until the camera's Stream Hold feature is disabled. VA GigE camera provides 128 MB
on-board memory for the Stream Hold feature. The Stream Hold feature does not allow you to select which
frame will be released to the host computer. When the Stream Hold feature is disabled, the stored frame data
will be released to the host computer. For more information, refer to the application note about stream hold.
XML Parameters
TransportLayerControl
Value
On
StreamHold
Off
-
FrameCapacity
Table 9.8 XML Parameters related to Stream Hold feature
61 of 94
Description
Delay the transmission of frame data and store them
in the frame buffer.
Release the stored frame data to the host computer.

Display the maximum number of frames that you
can store in the frame buffer

The maximum number of frames will vary
depending on the Image ROI and pixel format
settings.

With the Stream Hold feature set to On, the
newly acquired frame will be ignored after saving
the maximum number of frames.
VA GigE series
RA14-131-003