NewTek TriCaster 2 Elite (3 RU) User Manual
Page 93
P a g e | 75
P
REMULTIPLIED
A
LPHA
FIGURE 74
If you are supplying imagery (video sources, video clips, or still images) that support transparency by means
of an embedded alpha channel, your choice here will be important. There are two ‘flavors’ alpha channel
pixel encoding. The first is often called ‘straight’ or may be referred to as ‘non
-
premultiplied’.
U
nsurprisingly, the alternative is ‘premultiplied’.
The
Premultiplied Alpha
switch is off by default. Making the correct selection is necessary for correct
compositing over other imagery.
L
OW
B
ANDWIDTH
FIGURE 75
For NDI sources, a
Low Bandwidth
option is shown. This allows you to force the sending device to a lower
quality video stream that may nevertheless be quite useable if the source is not intended to be displayed full
screen. This option may be preferable in network settings with limited capacity (such as WiFi).
PTZ
C
ONTROL
FIGURE 76
For many source types, a
PTZ Control
menu is shown in the
Source
control group. The default control
Connection
type is
NDI
which, assuming you are configuring an NDI source, makes life a lot easier because
there is nothing else to configure.
Otherwise, if you *must select a ‘legacy’ control connection type like RS422, etc., or perhaps a non
-NDI
network connection, additional controls may be shown in this group to let you configure things like
Baud
Rate
,
Com Port
,
IP Address
, and the like.