title: Dynamic Loudness
media types:
Audio
description: Dynamically correct audio loudness as recommended by EBU R128.
version: 1
creator:
copyright: Meltytech, LLC
license: LGPLv2.1
This filter adjusts the level of the audio based on the loudness of the input. It performs loudness measurement over a specified sliding window of time. Then, it adjusts the gain on the output based on the difference between the measured loudness and the target loudness in order to achieve the desired loudness.
title: Target Program Loudness
description:
The target program loudness in LUFS (Loudness Units Full Scale).
type: float
readonly: no
required: no
minimum: -50.0
maximum: -10.0
default: -23.0
unit: LUFS
title: Measurement Window
description:
The duration of time in seconds over which the loudness is calculated.
type: float
readonly: no
required: no
minimum: 1
maximum: 100000
default: 3.0
unit: seconds
title: Maximum Gain Increase
description:
The maximum amount that the gain will be increased by the filter.
type: float
readonly: no
required: no
minimum: 0
maximum: 30
default: 15
unit: dB
title: Maximum Gain Decrease
description:
The maximum amount that the gain will be decreased by the filter.
type: float
readonly: no
required: no
minimum: 0
maximum: -30
default: -15
unit: dB
title: Reset on Discontinuity
description:
Reset the measurement if a discontinuity occurs like seeking or new clip is detected. Useful for playlists and tracks.
type: boolean
readonly: no
required: no
default: 1
title: Input Program Loudness
description:
The program loudness measured on the input over the duration of the window.
type: float
readonly: yes
required: no
unit: LUFS
title: Output Gain
description:
The amount of gain applied to the last frame. Updated with each new frame.
type: float
readonly: yes
required: no
unit: dB
title: Reset Count
description:
The number of times the filter has reset the loudness measurement. The measurement is reset whenever the filter detects a discontinuity in the frame sequence. It also resets when it detects that the producer has changed if clip_reset is set.
type: integer
readonly: yes
required: no
Subscribe to News via RSS.