Milestone XProtect Professional 2014 Manuel d'utilisateur télécharger pdf (Page 85)

Milestone XProtect

Professional

2014

Administrator's Manual

www.milestonesys.com

Advanced configuration

 Audio recording affects video storage capacity: Audio is recorded to the associated camera’s

database. Therefore, it is important to bear in mind that the database is likely to become full

earlier if you record audio and video than if you only record video. The fact that the database

becomes full is not in itself a problem since your system automatically archives (see "About

archiving" on page 126) data if the database becomes full. However, you may need additional

archiving space if you record audio.

o Example: If you use MPEG4, each one-second video GOP (Group Of Pictures) are stored

in one record in the database. Each second of audio will also be stored in one record in the

database. This reduces the database’s video storage capacity to half its capacity, because

half of the database’s records is used for storing audio. Consequently, the database runs

full sooner, and automatic archiving takes place more often than if you were only recording

video.

o Example: If you use MJPEG, audio is stored in one record for every JPEG for as long as

the audio block size does not exceed the time between the JPEGs. In extreme cases, this

reduces the database’s video storage capacity to half its capacity, because half of the

database’s records is used for storing audio. If you use very high frame rates, which

means less time between each JPEG, a smaller portion of the database is used for storing

audio records, and consequently a larger portion is available for storing video. The result is

that the database runs full sooner, and automatic archiving takes place more often than if

you were only recording video.

Above examples are simplified. The exact available video storage capacity also depends on

GOP/JPEG and audio kilobyte size.

Audio selection

When you configure video and recording (see "About video and recording configuration" on page 64),

you can specify certain properties for many cameras in one go. Either in order to speed up things, or

because the properties in question are shared by all cameras rather than being specific to individual

cameras. With a default microphone and/or speaker selected for a camera, audio from the microphone

and/or speaker is automatically used when you view video from the camera. Note that all of the

properties can also be specified individually for each camera.

Properties available in all XProtect software versions:

Name

Description

Template

The template can help you configure similar properties quickly. Say

you have 20 cameras and you want to change the recording path,

archiving path, and retention time for all of them. Instead of having

to enter the same three pieces of information 20 times, you can

simply enter them once in the template, and then apply the template

to the 20 cameras with only two clicks.

Apply Template

Select which cameras you want to apply the template for. Use one

of the two Set buttons to actually apply the template.

Camera Name

The name as it appears in the Management Application as well as

in clients. You can overwrite the existing name with a new one.

Names must be unique, and must not contain any of these special

characters: < > & ' " \ / : * ? | [ ]

Default Microphone

Select a default microphone.

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Milestone XProtect Professional 2014 Manuel d'utilisateur Page 85

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