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Project Description

ffmpeg script for normalizing audio.

This program normalizes media files to a certain dB level. The default is an RMS-based normalization where the mean is lifted. Peak normalization is possible with the -m option.

It takes any audio or video file as input, and writes the audio part as output WAV file. The normalized audio can also be merged with the original.

Requirements:

  • Python 2.7 (Python 3 is not supported yet)
  • ffmpeg from http://ffmpeg.org/ installed in your $PATH

Installation:

pip install ffmpeg-normalize

Usage:

ffmpeg-normalize [options] <input-file>...

Options:

  • -f, --force — Force overwriting existing files
  • -l, --level <level> — dB level to normalize to [default: -26]
  • -p, --prefix <prefix> — Normalized file prefix [default: normalized]
  • -t, --threshold <threshold> — dB threshold below which the audio will be not adjusted [default: 0.5]
  • -o, --dir — Create an output folder in stead of prefixing the file
  • -m, --max — Normalize to the maximum (peak) volume instead of RMS
  • -v, --verbose — Enable verbose output
  • -n, --dry-run — Show what would be done, do not convert
  • -d, --debug — Show debug output
  • -u, --merge — Don’t create a separate WAV file but update the original file. Use in combination with -p to create a copy
  • -a, --acodec <acodec> — Set audio codec for ffmpeg (see “ffmpeg -encoders”) when merging. If not set, default from ffmpeg will be used.
  • -e, --extra-options <extra-options> — Set extra options passed to ffmpeg (e.g. “-b:a 192k” to set audio bitrate)

Examples:

ffmpeg-normalize -v file.mp3
ffmpeg-normalize -v *.avi
ffmpeg-normalize -u -v -o -f -m -l -5 *.mp4
ffmpeg-normalize -u -v -a libfdk_aac -e "-b:a 192k" *.mkv

History

0.2.4 (2016-10-27)

  • Fixed issue where multiple spaces were collapsed into one

0.2.3 (2016-02-12)

  • Fixed issue where ffmpeg could not be found if path included spaces

0.2.2 (2016-02-09)

  • Change default level back to -26

0.2.1 (2016-02-08)

  • Documentation fixes

0.2.0 (2016-02-08)

  • Support multiple input files
  • Allow merging with input file instead of creating separate WAV
  • Write to directory instead of using prefix
  • Set the audio codec when merging
  • Set additional encoder or ffmpeg options

Note: avconv support is very limited, use the real ffmpeg from http://ffmpeg.org/ instead.

0.1.3 (2015-12-15)

  • Bugfix for detecting ffmpeg or avconv on Windows (as .exe)
  • Add version to Usage message
  • Update year

0.1.2 (2015-11-13)

  • Bugfix for missing ffmpeg or avconv

0.1.0 (2015-08-01)

  • First release, changing name to ffmpeg-normalize
Release History

Release History

0.2.4

This version

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0.2.3

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0.2.2

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0.2.1

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0.2.0

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0.1.3

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0.1.2

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0.1.1

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0.1

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Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
ffmpeg-normalize-0.2.4.tar.gz (6.5 kB) Copy SHA256 Checksum SHA256 Source Oct 27, 2016

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