Filter: avfilter.allpass

Plugin Information

title: allpass
media types: Audio
description: Apply a two-pole all-pass filter.
version: Lavfi9.12.100
creator: libavfilter maintainers

Notes

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.

Parameters

av.frequency

description: set central frequency
type: float
readonly: no
required: no
minimum: 0
maximum: 999999
default: 3000
format: double

av.f

description: set central frequency
type: float
readonly: no
required: no
minimum: 0
maximum: 999999
default: 3000
format: double

av.width_type

description: set filter-width type
type: string
readonly: no
required: no
format: integer or keyword
values:

  • h
  • q
  • o
  • s
  • k

av.t

description: set filter-width type
type: string
readonly: no
required: no
format: integer or keyword
values:

  • h
  • q
  • o
  • s
  • k

av.width

description: set width
type: float
readonly: no
required: no
minimum: 0
maximum: 99999
default: 0.707
format: double

av.w

description: set width
type: float
readonly: no
required: no
minimum: 0
maximum: 99999
default: 0.707
format: double

av.mix

description: set mix
type: float
readonly: no
required: no
minimum: 0
maximum: 1
default: 1
format: double

av.m

description: set mix
type: float
readonly: no
required: no
minimum: 0
maximum: 1
default: 1
format: double

av.channels

description: set channels to filter
type: string
readonly: no
required: no
default: ‘all’

av.c

description: set channels to filter
type: string
readonly: no
required: no
default: ‘all’

av.normalize

description: normalize coefficients
type: string
readonly: no
required: no

av.n

description: normalize coefficients
type: string
readonly: no
required: no

av.order

description: set filter order
type: integer
readonly: no
required: no
minimum: 1
maximum: 2
default: 2

av.o

description: set filter order
type: integer
readonly: no
required: no
minimum: 1
maximum: 2
default: 2

av.transform

description: set transform type
type: string
readonly: no
required: no
format: integer or keyword
values:

  • di
  • dii
  • tdi
  • tdii
  • latt
  • svf
  • zdf

av.a

description: set transform type
type: string
readonly: no
required: no
format: integer or keyword
values:

  • di
  • dii
  • tdi
  • tdii
  • latt
  • svf
  • zdf

av.precision

description: set filtering precision
type: string
readonly: no
required: no
format: integer or keyword
values:

  • auto
  • s16
  • s32
  • f32
  • f64

av.r

description: set filtering precision
type: string
readonly: no
required: no
format: integer or keyword
values:

  • auto
  • s16
  • s32
  • f32
  • f64

av.threads

description: Maximum number of threads
type: integer
readonly: no
required: no
minimum: 0
default: 0

position

description: The MLT position value to set on avfilter frames
type: string
readonly: no
required: no
default: frame
values:

  • frame
  • filter
  • source
  • producer

Search

Subscribe

Subscribe to News via RSS.

Recent Posts

About

MLT enables you to author, manage, and run multitrack audio/video compositions.
See our Hall of Fame
Copyright © 2008-2018 by Meltytech, LLC.

Social Links