Awesome

Sync Audio Tracks

This code is based on Miles McCoo's cross-correlation implementation. It calculates a delay between two audios and produces a shifted audio.

Known Limitations

Paths with spaces and weird characters are unsupported.

Supported Formats

They depend on how SoX and FFmpeg were built for your OS (more details). If it didn't work with some format for you — try WAV as experiment.

Installation

Make sure these dependences are installed:

bash (tested with 4.4.23)
bc (tested with 1.06.95)
ffmpeg (tested with 4.1.3)
fftw (tested with 3.3.6_p2)
libsndfile (tested with 1.0.28)
python3 (tested with 3.6.10)
sox (tested with 14.4.2)

On Debian some packages may need to be installed together with -dev packages (for instance fftw with fftw-dev).

Now compile it with

make -j

Usage

./sync-audio-tracks.sh good_audio_from_recorder.wav bad_audio_from_camera.wav out.wav 900

In this example

out.wav is a shifted version of good_audio_from_recorder.wav
900 is sound duration limit for analysis (in seconds)

Different speed/framerate/framedrops are not supported

This project is much simpler: it just computes and applies the shift (lossless, without re-encoding) without stretching/spreading parts of audio. ~~However something like that might will help to implement it.~~ Have a look at AudioAlign, it seems it supports these scenarios.

Support

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License

Apache 2.0