Filter: audiowaveform

Plugin Information

title: Audio Waveform Filter
media types: Video
description: An audio visualization filter that draws an audio waveform on the image.
version: 1
creator: Brian Matherly
copyright: Meltytech, LLC
license: LGPLv2.1

Parameters

bgcolor

title: Background Color
description:

The background color to be applied to the entire frame. The default color
is transparent.

A color value is a hexadecimal representation of RGB plus alpha channel
as 0xrrggbbaa. Colors can also be the words: white, black, red, green,
or blue. You can also use a HTML-style color values #rrggbb or #aarrggbb.

type: color
readonly: no
required: no
widget: color

color.*

title: Foreground color
description:

The color of the waveform.

Multiple colors can be specified with incrementing suffixes to cause the
waveform to be drawn in a gradient. color.1 is the top of the waveform.
Subsequent colors will produce a gradient toward the bottom.

By default, the filter has one color defined:

    color.1=0xffffffff"

This results in a white waveform.

To create a gradient, define more colors:

    color.2=green color.3=0x77777777

A color value is a hexadecimal representation of RGB plus alpha channel
as 0xrrggbbaa. Colors can also be the words: white, black, red, green,
or blue. You can also use a HTML-style color values #rrggbb or #aarrggbb.

type: color
readonly: no
required: no
widget: color

thickness

title: Line Thickness
description: The thickness of the line used to draw the waveform.
type: integer
readonly: no
required: no
minimum: 0
maximum: 20
default: 0
unit: pixels
widget: spinner

show_channel

title: Audio Channel
description:

The audio channel to draw.
"0" indicates that all channels should be drawn.

type: integer
readonly: no
required: no
minimum: 0
maximum: 20
default: 0
widget: spinner

angle

title: Angle
description: The rotation angle to be applied to the waveform.
type: float
readonly: no
required: no
minimum: 0
maximum: 360
default: 0
widget: spinner

rect

title: Rectangle
description:

Defines the rectangle that the waveform(s) should be drawn in.
Format is: "X Y W H".
X, Y, W, H are assumed to be pixel units unless they have the suffix '%'.

type: rect
readonly: no
required: no
default: 0 0 100% 100%

fill

title: Fill
description: Whether the area under the waveform should be filled in.
type: boolean
readonly: no
required: no
default: 0
widget: checkbox

gorient

title: Gradient Orientation
description: Direction of the color gradient.
type: string
readonly: no
required: no
default: vertical
widget: combo
values:

  • vertical
  • horizontal

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