Loudness Normalization

Loudness normalization

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In plain words

Set the overall volume to a platform's standard so it isn't too quiet or distorted.

When to use it

Just before final export.

Example videos

Volume vs Loudness - LUFS & LKFS for Measuring Loudness for Video — Explainer: Explains how volume differs from loudness (LUFS).
How Loud Should Your YouTube Videos Be? | Loudness Normalizing for YouTube — Explainer: See the process of setting the overall volume to a target LUFS for YouTube.
The Loudness Secret to Mixing YouTube Videos with DaVinci Resolve — Explainer: The part that explains the LUFS concept and the difference between peak and loudness normalization.

In AI video, like this

Each generated clip has a different loudness, so the volume jumps from cut to cut. Roughly level each clip, then apply loudnorm=I=-14:TP=-1:LRA=11 at the end in 2 passes. loudnorm changes the output to 192kHz, so add -ar 48000 with it. If a contest has its own spec, follow that value.

One-click prompt

Normalize the final mix to -14 LUFS so every clip plays at the same volume on social platforms: ffmpeg -i in.mp4 -af loudnorm=I=-14:TP=-1:LRA=11 -c:v copy out.mp4. For the best accuracy, run it in two passes and check the result around -14 LUFS before uploading.

See it in real films and ads

Serge Morgotch — How Loud Should Your YouTube Videos Be?

AI-made examples

Not verified

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