Output Geometry; Color Controls; Sync Streams; Image Remapping (Multiscreen Gobo) - PRG MBOX User Manual

Output Geometry

New in Mbox v4 are the output geometry controls. Some of these parameters were included in camera or keystone
functionality in Mbox v3.x. They have been separated into a more logical fixture here. Output position, scale, and
rotation allow the entire image for that output to be adjusted (in 2D space) to tweak the output. Whether for matching
other outputs in an overlap/blend setup, or for overall adjustment. These controls are 16-bit, but their values are not
pixel accurate.
There are also two controls for X and Y mix offset that are pixel accurate. These controls allow the imagery for an output
to be moved left/right and up/down on the Global Surface by an exact pixel amount with control from the console/
Director. These 16-bit controls have a default of 32767 and therefore allow 32767 pixels of movement. This is far more
pixels than is supported by the GS size limits, so care is required. The mix offset controls are exactly that, offsets. They
act to offset the output's position on the global surface from its position as set up in the initial configuration on the
Output tab of the Mbox application. Therefore, if an output has an X position of 100 on the Outputs tab, setting the mix
offset X parameter to a value of 32867 will move the mix 100 pixels to the right on the global surface. Note that this is a
live offset and does not affect the stored values on the Outputs tab, and which is not saved when the application quits,
nor recalled when the application launches.

Color controls

Color controls on Mbox's layers and output masters now have both subtractive and additive controls. These controls
are still 8-bit, and now have a default of 127. Controls for both brightness and contrast have been added, eliminating the
need to use layer/master effects to perform these tasks.

Sync Streams

The number of sync streams available has been increased. All versions are capable of listening to streams 1 – 96, but
the number of output streams is limited. Mbox Designer can output 32 streams, Studio 16, and Mini 8. Streams 33-96
are reserved for special purposes.

Image Remapping (Multiscreen gobo)

In Mbox v3.x, the Multiscreen gobo was a discrete item of content (in the Models folder) which was required to be
selected on a layer for use. An additional parameter was used to select the individual configuration from with the
currently selected image remapping file.
In Mbox v4, the multiscreen gobo "object" is built into the Mbox application itself, and is no longer selected as an actual
object on each layer. There is a new Image Remapping parameter that can select the configuration from within the
currently selected image remapping file.
Because image remapping needs to be disabled, a value of 0 for the image remapping parameter disables image
remapping. This means that image remapping files can no longer have a configuration 0, and now start with
configuration 1. Image remapping is now configured in the Mbox and Mbox Remote applications which use this new
scheme. The new application also allows a background image to be applies to the editor when creating configurations.

CITP/MSEX

Mbox v4 continues to use CITP/MSEX (v1.1) for the transfer of thumbnails to consoles and the streaming of imagery to
consoles and visualizers.
In Mbox v3 only outputs and layers were available as CITP stream sources, but in Mbox v4 mixes can now be used as
sources for CITP streams.
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