title: afftdn
media types:
Audio
description: Denoise audio samples using FFT.
version: Lavfi10.1.100
creator: libavfilter maintainers
Many parameters support animated values (keyframes) but only the numeric ones. Many numeric properties have type string because they accept an expression (see FFmpeg documentation) even though they evaluate to a numeric value.
description:
set the noise reduction
type: float
readonly: no
required: no
minimum: 0.01
maximum: 97
default: 12
description:
set the noise reduction
type: float
readonly: no
required: no
minimum: 0.01
maximum: 97
default: 12
description:
set the noise floor
type: float
readonly: no
required: no
minimum: -80
maximum: -20
default: -50
description:
set the noise floor
type: float
readonly: no
required: no
minimum: -80
maximum: -20
default: -50
description:
set the noise type
type: string
readonly: no
required: no
format: integer or keyword
values:
description:
set the noise type
type: string
readonly: no
required: no
format: integer or keyword
values:
description:
set the custom bands noise
type: string
readonly: no
required: no
description:
set the custom bands noise
type: string
readonly: no
required: no
description:
set the residual floor
type: float
readonly: no
required: no
minimum: -80
maximum: -20
default: -38
description:
set the residual floor
type: float
readonly: no
required: no
minimum: -80
maximum: -20
default: -38
description:
track noise
type: string
readonly: no
required: no
description:
track noise
type: string
readonly: no
required: no
description:
track residual
type: string
readonly: no
required: no
description:
track residual
type: string
readonly: no
required: no
description:
set output mode
type: string
readonly: no
required: no
format: integer or keyword
values:
description:
set output mode
type: string
readonly: no
required: no
format: integer or keyword
values:
description:
set adaptivity factor
type: float
readonly: no
required: no
minimum: 0
maximum: 1
default: 0.5
description:
set adaptivity factor
type: float
readonly: no
required: no
minimum: 0
maximum: 1
default: 0.5
description:
set noise floor offset factor
type: float
readonly: no
required: no
minimum: -2
maximum: 2
default: 1
description:
set noise floor offset factor
type: float
readonly: no
required: no
minimum: -2
maximum: 2
default: 1
description:
set the noise floor link
type: string
readonly: no
required: no
format: integer or keyword
values:
description:
set the noise floor link
type: string
readonly: no
required: no
format: integer or keyword
values:
description:
set band multiplier
type: float
readonly: no
required: no
minimum: 0.2
maximum: 5
default: 1.25
description:
set band multiplier
type: float
readonly: no
required: no
minimum: 0.2
maximum: 5
default: 1.25
description:
set sample noise mode
type: string
readonly: no
required: no
format: integer or keyword
values:
description:
set sample noise mode
type: string
readonly: no
required: no
format: integer or keyword
values:
description:
set gain smooth radius
type: integer
readonly: no
required: no
minimum: 0
maximum: 50
default: 0
description:
set gain smooth radius
type: integer
readonly: no
required: no
minimum: 0
maximum: 50
default: 0
description:
Maximum number of threads
type: integer
readonly: no
required: no
minimum: 0
default: 0
description:
The MLT position value to set on avfilter frames
type: string
readonly: no
required: no
default: frame
values:
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