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slhck / ffmpeg-normalize

Audio Normalization for Python/ffmpeg
MIT License
1.25k stars 117 forks source link

Pre-filters which affect levels will render wrong result #118

Closed weltonrodrigo closed 4 years ago

weltonrodrigo commented 4 years ago

Expected behavior When using pre-filters, the output should render the proper loudness level.

Actual behavior If you use a pre-filter capable of altering material or levels (silencing, compression, noise reduction, normalize, etc), they will not be taken in account when calculating loudness correction.

Command The exact command you were trying to run:

ffmpeg-normalize -prf dynaudnorm inputfile -ext mp3

I have submitted #117 to address that. Feel free to discard it if you disagree about the logic here.

slhck commented 4 years ago

True, any filter should actually be set in both passes to ensure correct leveling.

slhck commented 4 years ago

This is available in v1.17.0.