360 Systems 1200HD-EX - Manual (Page 71)

Page 70 MAXX-1200 Owner’s Manual
Ganging Channels for Synchronized Playback
Up to three video channels can be ganged together for frame-accurate playback. They may be
used for key and fill material (either stills or clips), or multi-channel playout of presentations,
such as synchronized matte backdrops on News Broadcasts, or multi-screen projection.
The channels can be ganged in the following combinations:
• Channel 1 controls Channel 2 and/or Channel 3
• Channel 2 controls Channel 3
Only one channel can be set as the master channel.
To set the Channel Ganging Master click EDIT >CONFIGURE >TIMING from the Main Menu.
• To select Channel 1 to be ganged with channel 2 only, set CHANNEL GANGING MASTER to 1
and click the GANG checkbox on channel 2.
• To select Channel 1 to be ganged with channel 3 only, set CHANNEL GANGING MASTER to 1
and click the GANG checkbox on channel 3.
• To select Channel 1 to be ganged with channels 2 and 3, set CHANNEL GANGING MASTER to
1 and click the GANG checkboxes on channel 2 and channel 3.
• To select Channel 2 to be ganged with channel 3 set CHANNEL GANGING MASTER to 2 and
click the GANG checkbox on channel 3.
Using Channel Ganging for Key-and-Fill or 3D Playback
Channel Ganging is used for frame-accurate playback of stills animated sequences that have an
alpha, or key, channel. These in turn are fed to a downstream keyer or video effects generator, to
be combined with other video content. Manual or automated control of the Master channel is all
that is needed to play both the key and the fill. The MAXX-1200 can also be used to play two
synchronized channels for 3-D applications.
The ‘Key’ and ‘Fill’ components of a clip are linked by their names: The ‘Key’ must have the
same name as the ‘Fill’, but with a trailing underscore. For example:
Fill clip name: myfile
Key clip name: myfile_
There is no provision for automatic loading of similar named clips on more channels than the
Master channel and the next higher numbered Ganged channel. Additional channels must be
loaded manually, after loading the master channel.
Proper key and fill operation requires two clips of identical length. This can be accomplished by
editing with head and tail trim.
Channel 2 is ganged to Channel 3 in the following example.
When a clip is opened/cued on Channel 2, the server automatically looks for another clip with
the same name, plus a trailing underscore. If the clip is found, it is loaded on Channel 3. The
Channel 2 clip contains the “fill” material, while the Channel 3 clip contains the ‘key’ (or alpha)
material.