Grass Valley iTX System v.2.6 - Manual (Page 250)

Working with iTX services on an Output Server machine
Working with iTX services on an Output Server
machine
The Output Server machine runs a number of interacting iTX services under the control of a
Server Controller:
• TXPlay manages live schedules. It notes the start times of events with fixed start
times; it calculates the start times of other (automatic) events. It sends commands
through the Output Server to the iTX Player to play out events at the specified times.
• The Output Server passes playout commands to the iTX Player from TXPlay; also from
iTX Desktop components, for live logos and CGs.
In the media-caching process, the Output Server responds to cache requests from the
Media Cache Service to copy media files from an iTX Media Store to the Output Server
cache.
•
The iTX Player responds to TXPlay commands to play out media files and live video
feeds through an SDI video card. In the process, it performs any required video and
audio mixing operations.
It gets media files from the Output Server cache.
If a required media file is not in the cache, TXPlay supplies details of the Media Store
location of the file; the iTX Player then plays out the media file from that location.
•
The Media Cache Service maintains the Output Server cache. It sends cache requests
to the Output Server so that media files are in the cache when they are due to play
out.
• TXEdit manages offline schedules. It performs the same scheduling functions as
TXPlay, but does not send playout commands to the Output Server.
• The iTX Software Updater. More details , page 297.
For the transmission of live news programmes, an extra service may run on the Output Server
machine:
• TXLive plays out schedule events under manual control. Like TXPlay, it sends playout
commands to the iTX Player through the Output Server. Instead of managing a live
schedule though, it receives commands from one or more iTX Desktop components
(e.g. the Live Control) to play out events.
Extra service-window features for services on the Output Server machine
As well as the features under the common service-window tabs that we describe in an earlier
section, there are extra features for:
• TXPlay.
• The Output Server.
• The Media Cache Service.
We explain the TXPlay and Output Server features here. See the next section, "The Media
Cache Service", for information on the Media Cache Service.
March 2015 System Administrator Guide Page 250 of 404