LuxRiot Blog

The information applies to:

• LuxRiot 1.1.12 and more recent

Summary

Large images from network cameras may be downsampled (reduced in size) before showing on the screen to improve system performance with no or minor impact on image quality.

Description

Network camera sometimes deliver large images (2 megapixels and greater, for example coming from Arecont Vision cameras) which are shown on the screen essentially reduced in size, for instance, 2048 x 1536 image (3 megapixels) displayed on 1280 x 1024 display in layout with 4 screens is reduced almost 4 times vertically and horizontally.

Depending on video adapter and its settings, this may create unnecessary load on system which can be reduced (in some cases significantly reduced) by pre-processing images received from camera.

Instructions

Change a setting “Downsample large images” in client application menu Tools, Options as shown below:

Settings “Enabled, Favor Quality” and “Enabled, Favor Speed” enable the feature. Note that the change has effect with reactivating broadcast from camera. Reconnect to server or restart application to make sure the change has effect.

Number of scanners (threads) running concurrently for detecting network cameras (Find Network Cameras wizard) can be changed by editing the registry. If your network is overloaded then it is recommended to decrease the default number of scanners in order not to miss some cameras. Increasing this number will increase the speed of the network detector, but decrease the probability of camera to be found.

Key Name: HKEY_LOCAL_MACHINE\SOFTWARE\A&H\LuxRiot\Server\
Value Name: Network Cameras Scanner Threads
Value Type: DWORD
Value: number of scanners to be used (default 12, maximum 32)

ArecontVision camera automatically decreases resolution in Night (low-light) mode. But sometimes it is convenient to decrease resolution more for better network bandwidth and archive usage. This feature is available in LuxRiot 1.1.16 for dual-lens AV3130 camera only.

LuxRiot version 1.1.16 automatically loads presets from network cameras. Currently Axis (both 2.x and 4.x firmware) and VCenter network cameras only supported. So the presets saved in a browser will be automatically available in DVRClient.

LuxRiot 1.1.16 has a new “Pause between frames” feature to decrease ArecontVision cameras network bandwidth and CPU usage. Choose ArecontVision camera’s property, Advanced tab and specify a delay between frames (msec). Setting this value to 100 msec, for example, will cause to produce ~8 FPS video stream from camera. Note, that ArecontVision camera will behave unstable if this value is too high (more than 1 sec). Leave it for 0 (default) for maximum FPS.

Starting from LuxRiot 1.1.16 version there is an ability to get more information about “WinHttp problem” in network cameras module. You have to have *-rt version installed. Choose network camera’s property, ‘Global’ tab and specify “WinHttp tracing” option (see the attachment). Restart LuxRiot server and try to reproduce the error. Additional log file (DVRWinHttp-DVRServer.exe-*.log) will be created. Submit it using LuxRiot’s Problem Report Wizard.

The information applies to:

• LuxRiot 1.1.12

Symptoms

When display is working in 15- or 16-bit mode the JPEG images are decoded with wrong colors, red and blue components are misplaced.

Resolution

To fix the problem mentioned above it is required to install an update on top of the installed LuxRiot 1.1.12. Please follow instructions below:

1. Download file http://luxriot.com/downloads/updates/LuxRiotCodecs-1.1.12-2006010801.exe
2. Stop all LuxRiot applications
3. Install the downloaded update on top of existing installation
4. Start LuxRiot applications