Filter: avfilter.ametadata

Plugin Information

title: ametadata
media types: Audio
description: Manipulate audio frame metadata.
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.mode

description: set a mode of operation
type: string
readonly: no
required: no
format: integer or keyword
values:

  • select
  • add
  • modify
  • delete
  • print

av.key

description: set metadata key
type: string
readonly: no
required: no

av.value

description: set metadata value
type: string
readonly: no
required: no

av.function

description: function for comparing values
type: string
readonly: no
required: no
format: integer or keyword
values:

  • same_str
  • starts_with
  • less
  • equal
  • greater
  • expr
  • ends_with

av.expr

description: set expression for expr function
type: string
readonly: no
required: no

av.file

description: set file where to print metadata information
type: string
readonly: no
required: no

av.direct

description: reduce buffering when printing to user-set file or pipe
type: string
readonly: no
required: no

position

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

  • frame
  • filter
  • source
  • producer

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