GRASS VALLEY Kayak - Path Control; Paths

74 Kayak — User Manual
Section 2 — Concepts
Path Control
Paths
Keyframes specify parameter values at specific times in an effect. Most of
the duration of an effect, however, occurs between these keyframes. The
Kayak system interpolates parameter values between keyframes (in-
betweening).
The trajectory, or path, a manipulated picture travels between keyframes is
determined by how these in-between values are interpolated. The Kayak
system offers you several path controls (Figure 45 on page 74):
• HOLD — No interpolation. Keyframes hold their values for their dura-
tions, then change all at once for the next keyframe.
• LINEAR — Applies a linear interpolation between keyframes; no accel-
eration or deceleration is applied. Movement is mechanical with a con-
stant velocity.
• S-LINEAR — Applies a linear or straight line motion between key-
frames, with acceleration and deceleration applied at the beginning and
end of each keyframe. At each S-Linear keyframe the motion is stopped
for two fields.
• CURVE — This selection causes a rounded path through the keyframe.
Paths are user adjustable with path modifiers (tension, continuity, and
bias) described below.
Figure 45. Path Types
Hold Linear
0721_06_45_r1
S-Linear Curve
KF1
Slow
Fast
Fast
Stop
Constant
Speed
Slow
Slow
Slow
Fast
Fast
Slow
KF2
KF3
KF1
KF2
KF3
KF 1
KF2
KF3
KF1
KF2
KF3