Mirasys VMS 7.5 Spotter for Windows User Guide

The fields in the advanced information are as follows:



Min and max interval for frames received from recorder (milliseconds)

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Min and max interval for reading frames from video buffer (milliseconds)

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Min and max drawing interval for frames in user interface (milliseconds)

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Amount of frames in video buffer queue (min/max for each second)



Decompression time for frame (min/max) in milliseconds

For example, for a 15 fps stream, the frame interval should average 66.7 milliseconds (1000 divided by 15). If the received and buffered frame intervals start to differ by a large amount from this theoretical value, it is likely that the traffic is arriving in bursts.

Buffering will attempt to smooth bursty traffic and it is normal in these situations to see queue to have more than 1 frame in it to smooth the live video.

If high decompression time is shown compared to the difference of frames, it is likely that video is too high resolution, framerate or bitrate for the displaying system.

Contact your system administration to change camera settings.

The display will start to show following colors if it detects that buffering cannot keep up with video.

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Yellow color: buffering is close to having to discard frames to keep up with live video. Some live video playback jerkiness can be observable



Red color: buffering has to skip frames to be able to keep up with live video.

If red color is seen, contact your system administrator to investigate system performance.

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ETTINGS

The advanced settings contain more rarely used settings, but these settings are still not at all unimportant.

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The first part contains information if different dialogs are shown



End User License Agreement (EULA) dialog

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Exit confirmation dialog

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Video export dialog



Image export dialog

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

Storyboard export dialog



Show video grid

The final checkbox in the dialog list is the selected camera highlight. If checked, a dotted line highlight is shown in the local Spotter and AVM when a camera is selected either with a mouse click or with the device numbering method.

Activating the “Show video grid” option draws the traditional white border for the realtime spotter device tab. In the default setting the camera grid is hidden.

The second part is video buffering.

Spotter has advanced video buffering that smooths out the effect of a bursts in network or an ill-behaving camera where the image frames are not arriving smoothly and regularly from camera to Spotter. Without the buffering on, Spotter draws the live images as fast as they arrive, without any regard on the frame rate or the image timestamp. If this setting (no buffering) leads to jumpy video in live view, users can turn on the buffering.

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When buffering is on, the images are held in a queue if they arrive too quickly or in bursts. The queue is dynamically managed so that it is kept as small as possible to conserve memory and to keep the delays as low as possible. Images are then drawn from the queue on regular intervals based on the perceived frame rate, achieving very smooth video playback for live cameras even in extremely challenging network and camera conditions. Buffering is done for compressed images to reduce the memory consumption effect of buffering. Even so, please note that engaging the buffering will increase memory consumption and cause some delay to the video image.

T he second option is used to control the “buffering..” animation that is shown in

Spotter when playback position was changed enough that playback needed to buffer video material before actual playback commences.

In the full-screen part of the advanced settings, user can define if the top and bottom bars of the Spotter full-screen window disappear after some time of no mouse movement. If the check box “Hide components in full screen mode” is checked, and the radio button selector is in the

“10 seconds” position, the top and bottom bars disappear when the mouse has not moved for 10 seconds.

If the checkbox is left unchecked, then the top and bottom bar are always shown. It is also possible to hide the top and bottom bars always.

The external API (Application Programming Interface) is used for example by the

Agile Virtual Matrix console to send commands to the display servers. This setting needs to be active when using AVM, and the port number needs to be same in the display servers and the AVM operator consoles.

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The activation of the external API needs to be done only once. It will require

Windows local administrator rights.

The VCA usage checkbox is meant for scenarios where third party VCA is used.

Usually this selection should not be activated.

If the Master Server reconnection

–selection is selected, Spotter will not exit if the

Master Server (SMServer service) connection is lost. In this case, Spotter will stay open and attempt reconnection to the Master periodically, initially with a few second intervals, but if the connection has not returned, the interval is lengthened to 1 minute intervals.

The default behavior (the “Master server reconnection” is unselected) is that Spotter will exit to login screen 30 seconds after the connection is lost.

The final setting in this setting tab is the bookmarks display. The default behavior is that all bookmarks are shown in time slider. It is possible to change this setting so that only the bookmarks are shown which relate to the open devices in the currently active tab.

Frequently Used Keyboard Shortcuts:

Shortcut Description

F3 Show settings window

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