Adobe 12040118 Using Help - Page 89

FootageSource object, Description, Parameters, Attributes

Page 89 highlights

Help Using Help Reference Back 89 Description The FootageItem replaceWithSequence() method replaces the FootageItem with the image sequence given as a parameter. In After Effects 6.5, in addition to loading the given file, this method does the following: • Sets the mainSource to a new value reflecting the contents of the new file. • Sets the name, width, height, frameDuration, and duration attributes, defined in the base AVItem class, based on the contents of the file. • Preserves interpretation parameters from the previous mainSource. • Guesses the alpha if replace() is called with a file that has an unlabeled alpha channeI. Parameters color name width height pixelAspect Floating-point array string integer integer Floating-point value color of the solid (an array of four floating-point values from 0 to 1: [R, G, B, A]) name of the solid width of the solid [4..30,000] height of the solid [4..30,000] pixel aspect ratio of the Solid [0.01..100] FootageSource object app.project.item(index).mainSource. app.project.item(index).proxySource. Description The FootageSource object holds information describing the source of some footage. It is used to hold the mainSource of a FootageItem, or the proxySource of an AVItem. AVItem is the base class of FootageItem and CompItem; thus proxySource appears in both these types of Item. Attributes Attribute hasAlpha alphaMode premulColor invertAlpha isStill fieldSeparationTy pe Reference Description see "FootageSource hasAlpha attribute" specifies if a footage clip or proxy includes an on page 92 alpha channel see "FootageSource alphaMode attribute" on page 90 specifies the mode of an alpha channel see "FootageSource premulColor attribute" on page 94 specifies the color to be premultiplied see "FootageSource invertAlpha attribute" on page 93 specifies if an alpha channel in a footage clip or proxy should be inverted see "FootageSource isStill attribute" on specifies if footage is a still image page 93 see "FootageSource fieldSeparationType attribute" on page 91 specifies the field separation type Using Help Back 89

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Reference
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Description
The FootageItem replaceWithSequence() method replaces the FootageItem with the image sequence given as
a parameter.
In After Effects 6.5, in addition to loading the given file, this method does the following:
• Sets the mainSource to a new value reflecting the contents of the new file.
• Sets the name, width, height, frameDuration, and duration attributes, defined in the base AVItem class,
based on the contents of the file.
• Preserves interpretation parameters from the previous mainSource.
• Guesses the alpha if replace() is called with a file that has an unlabeled alpha channeI.
Parameters
FootageSource object
app.project.item(index).
mainSource.
app.project.item(index)
.proxySource.
Description
The FootageSource object holds information describing the source of some footage. It is used to hold the
mainSource of a FootageItem, or the proxySource of an AVItem. AVItem is the base class of FootageItem and
CompItem; thus proxySource appears in both these types of Item.
Attributes
color
Floating-point array
color of the solid (an array of four floating-point values from 0 to
1: [R, G, B, A])
name
string
name of the solid
width
integer
width of the solid [4..30,000]
height
integer
height of the solid [4..30,000]
pixelAspect
Floating-point value
pixel aspect ratio of the Solid [0.01..100]
Attribute
Reference
Description
hasAlpha
see “FootageSource hasAlpha attribute”
on page 92
specifies if a footage clip or proxy includes an
alpha channel
alphaMode
see “FootageSource alphaMode
attribute” on page 90
specifies the mode of an alpha channel
premulColor
see “FootageSource premulColor
attribute” on page 94
specifies the color to be premultiplied
invertAlpha
see “FootageSource invertAlpha
attribute” on page 93
specifies if an alpha channel in a footage clip or
proxy should be inverted
isStill
see “FootageSource isStill attribute” on
page 93
specifies if footage is a still image
fieldSeparationType
see “FootageSource fieldSepara-
tionType attribute” on page 91
specifies the field separation type