2011

Table Of Contents
To:Use:
updated with respect to changes in start and end times. Remem-
ber to set clip link Repeat parameter to Loop to avoid indexing
black frames.
To:Use:
Control the quality of the internally-generated motion vectors in
warp mode by applying the motion analysis only to lower-resolu-
Quality
tion versions of the input image, up to the resolution specified
by the quality parameter. This parameter is disabled as soon as
one vector input is connected. Limiting the quality of motion
vectors to half or a quarter for a high-resoultion (ex: 1080p or
film resolution) input clip can greatly accelerate warp processing,
with little loss in resulting retimed output clip quality.
Control how long the camera shutter stays open, and therefore
the time range over which the samples will be distributed. A value
Shutter (camera
analogy)
of 1 means a full frame time. Values above 1, though not physically
possible, can be specified for artistic effect.
Control when a reference motion vector offset is used. If reference
is set, the motion vector at the Reference Position is subtracted
Reference
from all motion vectors in the image. The result is that the pixel
at the reference position will appear to be motionless, and so will
pixels with similar motion vectors. Conversely, pixels which were
motionless will appear to move with the subtracted Reference
Position motion vector. This reference motion vector offset
changes over time using the velocity of neutralized vectors, so
you will seldom have to manually set offset keyframes using Ref-
erence Position.
Set the amount of blur to apply at the reference position. A value
of zero means that no blur should be applied. This is the default.
Reference Weight
A value of one means to blur by the same amount as the forward
vectors at the Reference Position. This is equivalent to disabling
the use of a reference vector offset. A value of one half means to
blur half as much as the forward vectors at the Reference Position.
Describes the x coordinate of the normalized reference position.Reference X
Describes the y coordinate of the normalized reference position.Reference Y
694 | Chapter 28 Time Tools