3 identifier: rotoscoping
5 copyright: Copyright (C) 2011 Till Theato
10 creator: Till Theato <root@ttill.de>
13 description: Keyframable vector based rotoscoping
16 - in some cases top most row in polygon is assigned to outside
22 description: How to visualize the area described by the spline
33 - identifier: alpha_operation
34 title: Alpha Operation
37 How to proceed with the current alpha mask (only if mode = alpha).
38 clear = existing alpha mask is overwritten
39 max = maximum: existing alpha mask, mask generated by this filter
40 min = minimum: existing alpha mask, mask generated by this filter
41 add = existing alpha mask + generated mask
42 sub = existing alpha mask - generated mask
58 description: use area inside of spline (0) or the outside (1)
70 description: amount of feathering (radius of "average" blur applied on mask)
74 maximum: 1000 # no real limit
79 - identifier: feather_passes
80 title: Feathering passes
82 description: number of blur (feathering) passes
86 maximum: 1000 # no real limit
95 The spline, a list of cubic Bézier curves, is described using JSON.
96 The most basic parts are the coordinate tuples: [x, y]; x,y will be mapped from the range 0-1 to the image dimensions.
97 Next layer are the Bézier points: [handle 1, point, handle 2] with handle 1, point, handle 2 being coordinate tuples
98 The spline is a list of Bézier points.
99 Optionally keyframes can be defined as a object of frame values, relative to the filter's in point, assigned to splines.