/usr/share/mlt/plus/filter_loudness.yml is in libmlt-data 0.9.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | schema_version: 0.1
type: filter
identifier: loudness
title: Loudness
version: 1
copyright: Brian Matherly <pez4brian@yahoo.com>
creator: Brian Matherly <pez4brian@yahoo.com>
license: LGPLv2.1
language: en
tags:
- Audio
description: Correct audio loudness as recommended by EBU R128.
notes: >
This filter requires two passes. The first pass performs analysis and stores
the result in the "results" property. The second pass applies the results to
the audio in order to achieve the desired loudness over the range of the
filter.
parameters:
- identifier: results
title: Analysis Results
type: string
description: >
Set after analysis. Used during application.
Loudness information about the original audio.
When results are not supplied, the filter computes the results and stores
them in this property when the last frame has been processed.
mutable: no
- identifier: program
title: Target Program Loudness
type: float
description: >
Used during application.
The target program loudness in LUFS (Loudness Units Full Scale).
readonly: no
mutable: yes
default: -23.0
minimum: -50.0
maximum: -10.0
unit: LUFS
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