title: Shape Alpha
media types:
Video
description:
version: 6
creator: Charles Yates
license: LGPLv2.1
title: File
description:
The name of a file or MLT producer URL. To use a luma wipe from the lumas module, put % in front of the base name of the luma file e.g. %luma16.pgm
type: string
readonly: no
required: yes
title: Threshold
description:
Convert alpha or luma values below this level as opaque and above this level as transparent. This is mostly useful for luma wipe images.
type: float
readonly: no
required: no
animation: yes
minimum: 0
maximum: 100
default: 100
unit: ‘%’
title: Softness
description:
When using mix (threshold) how soft to make the edge around the threshold. 0.0 = no softness, 1.0 = too soft
type: float
readonly: no
required: no
minimum: 0
maximum: 1
default: 0.1
title: Invert
description:
Invert the resulting alpha channel.
type: boolean
readonly: no
required: no
title: Invert Mask
description:
Use the inverse of the resource's alpha channel or luma value.
type: boolean
readonly: no
required: no
title: Reverse
description:
Use the complement of the mix level. This also inverts the output alpha, which is probably not what you want. See also invert_mask.
type: boolean
readonly: no
required: no
title: Use Luma
description:
Use the image luma instead of the alpha channel.
type: boolean
readonly: no
required: no
title: Use Threshold
description:
Whether to apply a threshold filter to the luma or alpha or not. If not, luma or alpha value of the resource (File) is copied to the alpha channel.
type: boolean
readonly: no
required: no
default: true
title: Audio volume follows Threshold
description:
This controls whether to also apply a volume level adjstment corresponding to the current mix property. The default is retained for legacy reason, but it is generally not recommended to enable this.
type: boolean
readonly: no
required: no
default: true
title: Alpha Operation
description:
The way to combine the alpha channel of the mask with the source, but this currently only works when use_mix = 0.
type: string
readonly: no
required: no
default: overwrite
values:
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