title: Audio Waveform Filter
media types:
Video
description: An audio visualization filter that draws an audio waveform on the image.
version: 1
creator:
copyright: Meltytech, LLC
license: LGPLv2.1
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
animation: yes
widget: 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
animation: yes
widget: color
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
title: Audio Channel
description:
The audio channel to draw. "0" indicates that all channels should be drawn. "-1" indicates that all channels will be added together in a single waveform.
type: integer
readonly: no
required: no
animation: yes
minimum: 0
maximum: 20
default: 0
widget: spinner
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
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
animation: yes
default: 0 0 100% 100%
title: Fill
description:
Whether the area under the waveform should be filled in.
type: boolean
readonly: no
required: no
default: 0
widget: checkbox
title: Gradient Orientation
description:
Direction of the color gradient.
type: string
readonly: no
required: no
default: vertical
widget: combo
values:
title: Window
description:
The duration of the audio (in ms) to be drawn in the waveform. If the window is less than the duration of a frame, the duration of a frame will be used. If the window is more than the duration of a frame, samples will be buffered from previous frames to fill the window. The buffering is performed as a sliding window so that the most recent samples are always transformed.
type: integer
readonly: no
required: no
default: 0
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