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JavaScript Reference
FootageSource object
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FootageSource hasAlpha attribute
a p p . p r o j e c t . i t e m
( i n d e x )
. m a i n S o u r c e
.
h a s A l p h a
a p p . p r o j e c t . i t e m
( i n d e x )
. p r o x y S o u r c e
.
h a s A l p h a
Description
When true, the footage has an alpha component. In this case, the attributes
a l p h a M o d e
,
i n v e r t A l p h a
, and
p r e m u l C o l o r
have valid values. When false, those attributes have no relevant meaning for the footage.
Type
Boolean; read-only.
FootageSource highQualityFieldSeparation attribute
a p p . p r o j e c t . i t e m
( i n d e x )
. m a i n S o u r c e
.
h i g h Q u a li t y F i e l d S e p a r a t i o n
a p p . p r o j e c t . i t e m
( i n d e x )
. p r o x y S o u r c e
.
h i g h Q u a l i t y F i e l d S e p a r a t i o n
Description
When true, After Effects uses special algorithms to determine how to perform high-quality field separation.
It is an error to set this attribute if
i s S t il l
is true, or if
f i e ld S e p a r a t i o n T y p e
is
F i e l d S e p a r a t i o n T y p e . O F F
.
Type
Boolean; read/write.
FootageSource invertAlpha attribute
a p p . p r o j e c t . i t e m
( i n d e x )
. m a i n S o u r c e
.
i n v e r t A l p h a
a p p . p r o j e c t . i t e m
( i n d e x )
. p r o x y S o u r c e
.
i n v e r t A lp h a
Description
When true, an alpha channel in a footage clip or proxy should be inverted.
This attribute is valid only if an alpha is present. If
h a s A l p h a
is false, or if
a l p h a M o d e
is
A l p h a M o d e . I G N O R E
,
this attribute is ignored.
Type
Boolean; read/write.
FootageSource isStill attribute
a p p . p r o j e c t . i t e m
( i n d e x )
. m a i n S o u r c e
.
i s S t i l l
a p p . p r o j e c t . i t e m
( i n d e x )
. p r o x y S o u r c e
.
i s S t i ll
Description
When true the footage is still; when false, it has a time-based component.
Examples of still footage are JPEG files, solids, and placeholders with duration of 0. Examples of non-still
footage are movie files, sound files, sequences, and placeholders of non-zero duration.
Type
Boolean; read-only.
Summary of Contents for 65009963 - After Effects CS4
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