NewTek TriCaster TC1 (2 RU) - Manual (Page 99)

P a g e | 83
The tracked region is defined by choosing a primary Color using the color picker tool. The Tracker follows
this region as it moves and shifts within the frame over time, and outputs the motion data for downstream
application.
Tracker output from one source can be used to dynamically modify the positioning of other video
sources, when configured to do so in their individual Position panels.
A DJUSTING T OLERANCE
Click the eyedropper, and, while
holding the mouse button down,
drag the pointer over top of the
monitor for the source you want
to track (see Figure 85). The
Tracker ’s color swatch updates as
you drag, until you release the
button to finalize your selection.
To assist you while making adjustments, a yellow rectangle is
overlaid on the video to show the effect of the current
Tracker
settings. Watch how this overlay is affected by adjustments you make
to the
Tolerance value for the Tracker . Raise or lower the Tolerance
value until the result is steady, not jittering or jumping about.
Hint: The yellow overlay disappears when you close the panel (or
disable the Tracker), but you can show it full-time if you wish. To do
so, right-click the desired viewport, and enable Tracking Markers
from the Overlays options group in the menu.
S MOOTHNESS
The Smoothness setting works just like the LiveMatte feature with the same name. Its impact on tracking
data output may seem minimal, but it can be important when used with the Advanced Tracking effect in M/E
panels (see Section 14.2.2).
L OCK
At right are controls that permit you to Lock certain Tracker attributes, preventing them from changing in
the scene.
FIGURE 86
• Lock Scale to prevent the Tracker from automatically compensating when
the scale of the tracked region grows or shrinks during motion.
• Likewise, when Rotation is locked, the orientation of Tracker output is
constrained.
• The Aspect Ratio lock forces the Tracker to conform to a square ( 1:1 ), or
rectangular ( 4:3 or 16:9 ) shape.
Hint: Locking channels in this manner makes it easier to obtain a steady motion track; but often, your choices
will be dictated by creative requirements.
FIGURE 85