Message Syntax (port 900)

Messages sent to port 900 are passed to the video subsystem directly; for this reason, such messages have a different syntax.

Messages sent to the video subsystem have the following syntax:

OBJECT TYPE|OBJECT ID|ACTION [|PARAMETER<VALUE>]

Below is the syntax of messages that contain n parameters.

OBJECT TYPE|OBJECT ID|ACTION [|PARAMETER 1<VALUE>,PARAMETER 2<VALUE>,…,PARAMETER N<VALUE>]

Attention!

Port 900 may only be used to manage objects of the GRABBER, CAM, or MONITOR types.

The message parameters are described in the table below.

Parameter	Description
Object type	Object type (GRABBER, CAM, or MONITOR)
Object ID	The object ID set during creation of the object in Axxon PSIM
Action	Action (command)
Parameter <Value>	Parameter name. The value is enclosed by angle brackets.

Example 1. Setting camera 1 to recording mode.

CString msg = “CAM|1|REC”;

SendMsg (id,msg);

Example 2. Saving video from all cameras to local disk C.

CString msg = “GRABBER|1|SET_DRIVES|drives<C:\>” ;

SendMsg(id,msg);

Note.

The SET_DRIVES command includes the ID of any of the video capture cards created in the system.

Note.

The SET_DRIVES command does not change the video archiving settings set in the system.

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