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
HeartbeatTimeout – Uint32 – R/W
Timespan for which the camera waits for a heartbeat packet. If a heartbeat
packet is not received within HeartbeatTimeout, the camera assumes the host
has closed its controlling application or is dead, and closes its stream and con-
trol channel. This parameter may need to be increased if stepping through code
in a debugger, as this prevents the driver from sending heartbeat packets.
Multicast
Multicast mode allows the camera to send image data to all hosts on the same
subnet as the camera. The host computer that first enables multicast mode is
the master, and controls all camera parameters. All other hosts / instances are
the monitors, and can view image data only.
MulticastEnable – Enum – R/W
Enables multicast mode. In order to enable this, the camera must not be
streaming.
MulticastIPAddress – String – R/W
Set the multicast IP address.
NonImagePayloadSize – Unit32 – R
Size of chunk mode data. If ChunkModeActive = FALSE, NonImagePayloadSize
= 0.
PacketSize – Uint32 – R/W
Determines the Ethernet packet size. Generally, this number should be set to as
large as the network adapter will allow. If this number is reduced, then CPU
loading will increase. Packet sizes > 1500 are called jumbo packets/frames in
Ethernet terminology. If your GigE network adapter does not support jumbo
packets/frames of at least 8228 Bytes (the camera default on power up), then
you will need to reduce PacketSize parameter to match the maximum supported
by your network adapter. A PacketSize of 1500 is a safe setting which all GigE
network cards support.
Range: [500 – 3,600,000] Default: 6000 Units: ms
Note

Most GigE switches support a maximum
PacketSize of 1500 in Multicast mode.
Possible values: On, Off Default: Off
Units: Bytes
Range: [Camera dependent] Units: Bytes
Note

If you are seeing all “black images”, or all frames
reported as StatFramesDropped and zero images
reported as StatFramesCompleted, you will likely
need to decrease this parameter.