Intelligent Roadway Information System
A computer running MonStream can be configured to stream a grid of four or more
video feeds onto a single large monitor. The only configuration required on the
MonStream computer is to grant access to the
/var/lib/monstream/ directory for
the UID of the monstream process.
A controller must be configured to represent each MonStream computer. It will
need to be on a comm link using the MonStream protocol, with a timeout of 2000
ms. The comm link URI should be of the form:
[ip address]:7001. Each video
monitor to be displayed should be associated with an IO pin of the controller.
For example, a quad-screen monitor would have monitors associated with pins 1
View ➔ Video ➔ Video Monitor menu item
Each row of the table represents one video monitor.
|Name||Video monitor name|
|Notes||Location or usage text|
|Group name||Privilege group, for access control|
|Monitor num||Number for selecting and switching|
|Restricted||Flag restricting monitor to published cameras only|
|Monitor style||Style of title bar, etc|
|💡 Manage||notes||restricted, monitor_style|
|🔧 Configure||mon_num, controller||pin|
View ➔ Video ➔ Monitor Styles menu item
|Monitor Style||Monitor style name|
|Force aspect||Flag to preserve video aspect ratio|
|Accent||Hexadecimal RGB color of title bar|
|Font Size||Size of title bar font (points)|
|Title Bar||Flag to enable title bar|
|Auto Expand||Flag to use full screen when only one monitor is active|
There are several methods available for switching video monitors. Using any of
these methods, when a camera is assigned to a
monitor num, all monitors
and flow streams with that number will be switched.
On the upper-right of the Camera tab, there is a
monitor num selector.
The number chosen here will be switched any time a camera is selected, either
from the map or a list.
The selector tool can also be used to change the
monitor num or camera.
Certain camera keyboards can be used for video monitor switching.
With a USB joystick and keypad, a MonStream computer can be used for switching.
View ➔ Video ➔ Play Lists menu item
Play lists can be created to cycle through related cameras. Each user can
have a personal play list, but system play lists are available to all users.
Selecting a play list on a monitor will cause the play list to automatically
switch. The interval is specified by the
A catalog is a collection of play lists. Both play lists and catalogs can be assigned sequence numbers, so they can be used in the same way.