# frei0r-filter-c0rners

Four corners geometry engine

## Hierarchy

    GObject
        ╰──GInitiallyUnowned
            ╰──GstObject
                ╰──GstElement
                    ╰──GstBaseTransform
                        ╰──GstVideoFilter
                            ╰──frei0r-filter-c0rners

## Factory details

Authors: – Sebastian Dröge , Marko Cebokli

Classification: – `Filter/Effect/Video`

Rank – none

Plugin – frei0r

Package – GStreamer Bad Plug-ins

## Pad Templates

### `sink`

    video/x-raw:
             format: RGBA
              width: [ 1, 2147483647 ]
             height: [ 1, 2147483647 ]
          framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – sink

Object type – GstPad

### `src`

    video/x-raw:
             format: RGBA
              width: [ 1, 2147483647 ]
             height: [ 1, 2147483647 ]
          framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – src

Object type – GstPad

## Properties

### alpha-operation

    “alpha-operation” gdouble

Flags : Read / Write

Default value : 0

### corner-1-x

    “corner-1-x” gdouble

X coordinate of corner 1

Flags : Read / Write

Default value : 0.333333

### corner-1-y

    “corner-1-y” gdouble

Y coordinate of corner 1

Flags : Read / Write

Default value : 0.333333

### corner-2-x

    “corner-2-x” gdouble

X coordinate of corner 2

Flags : Read / Write

Default value : 0.666666

### corner-2-y

    “corner-2-y” gdouble

Y coordinate of corner 2

Flags : Read / Write

Default value : 0.333333

### corner-3-x

    “corner-3-x” gdouble

X coordinate of corner 3

Flags : Read / Write

Default value : 0.666666

### corner-3-y

    “corner-3-y” gdouble

Y coordinate of corner 3

Flags : Read / Write

Default value : 0.666666

### corner-4-x

    “corner-4-x” gdouble

X coordinate of corner 4

Flags : Read / Write

Default value : 0.333333

### corner-4-y

    “corner-4-y” gdouble

Y coordinate of corner 4

Flags : Read / Write

Default value : 0.666666

### enable-stretch

    “enable-stretch” gboolean

Enable stretching

Flags : Read / Write

Default value : false

### feather-alpha

    “feather-alpha” gdouble

Makes smooth transition into transparent

Flags : Read / Write

Default value : 0.01

### interpolator

    “interpolator” gdouble

Quality of interpolation

Flags : Read / Write

Default value : 0.166667

### stretch-x

    “stretch-x” gdouble

Amount of stretching in X direction

Flags : Read / Write

Default value : 0.5

### stretch-y

    “stretch-y” gdouble

Amount of stretching in Y direction

Flags : Read / Write

Default value : 0.5

### transparent-background

    “transparent-background” gboolean

Makes background transparent

Flags : Read / Write

Default value : false

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