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Look-ahead time, Cache-ahead time – Grass Valley iTX System v.2.6 User Manual

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Using Missing Materials Manager

Look-ahead time

When searching a schedule for events with missing media, Missing Materials Manager "looks

ahead" to a specific point in the schedule. This point is set by the service look-ahead time – a

future period of specified length (e.g. 10 days). Missing Materials Manager checks all schedule

events that have a start time that falls within this period; when it finds an event for which there

is no media file, it adds the event to the missing-materials list.

Files for events that fall within the look-ahead time are not deleted in the auto-purging process.

You set the look-ahead time in the Days Look Ahead box under the Engineering, Channel tab.

Specify the look-ahead time

1.

In the Missing Materials Manager window, select the Engineering, Filtering tab.

2.

Enter the number of days for the length of the look-ahead time in the Days Look Ahead

box.

Cache-ahead time

Where an event in the missing-materials list requires a media file that is on an archive, Missing

Materials Manager can use a Media Watcher that has access to the archive to copy the file to a

Media Store. It does this if the start time of the event falls within the service cache-ahead time

– a future period of specified length (e.g. 10 days), which cannot be greater than the look-

ahead time.

You set the cache-ahead time in the Days Cache Ahead box under the Engineering, Channel

tab.

Specify the cache-ahead time

1.

In the Missing Materials Manager window, select the Engineering, Filtering tab.

2.

Enter the number of days for the length of the cache-ahead time in the Days Cache Ahead

box.

Specifying which live schedules Missing Materials Manager should monitor

By default, Missing Materials Manager checks schedules in all live playout channels for events

with missing media files. You can configure it so that it only monitors selected playout

channels. You may want to do this in a multi-channel system that has multiple instances of

Missing Materials Manager, each one dedicated to its own group of channels.

To select a group of playout channels for monitoring, you use the features in the panel under

the Engineering, Channels tab:

March 2015

System Administrator Guide

Page 351 of 404

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