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Normalize audio via ffmpeg / avconv

Project description


ffmpeg / avconv macro for normalizing audio

Audio normalization script, normalizing media files to WAV output

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


pip install ffmpeg-normalize


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


- ``-f``, ``--force`` — Force overwriting existing files
- ``-l``, ``--level <level>`` — dB level to normalize to [default: -28]
- ``-p``, ``--prefix <prefix>`` — Normalized file prefix [default:
- ``-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
- ``-m``, ``--max`` — Normalize to the maximum (peak) volume instead of
- ``-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)


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:v 192k" *.mkv


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 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

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