Command line help:
usage: stpl [-h] [--version] [-t TAKE] [-s] [-n] [-d] [-l LOWPASS] in1 in2
CLI interface to sync two media files using their audio streams.
ffmpeg needs to be available.
positional arguments:
in1 First media file to sync with second, using audio.
in2 Second media file to sync with first, using audio.
options:
-h, --help show this help message and exit
--version show program's version number and exit
-t TAKE, --take TAKE Take X seconds of the inputs to look at. (default: 20)
-s, --show Turn off "show diagrams", in case you are confident.
-n, --normalize Turn on normalize. It turns on by itself in a second pass, if sampling rates
differ.
-d, --denoise Turns on denoise, as experiment in case of failure.
-l LOWPASS, --lowpass LOWPASS
lowpass, just in case, because like with manual sync'ing, the low frequencies
matter more. 0 == off. (default: 0)
The steps taken by syncstart:
- extract start audio as
.wavusing ffmpeg - optionally normalize, denoise, lowpass the two
.wav - compute offset via correlation using scipy ifft/fft
- print result and optionally show in diagrams
Requirements:
- ffmpeg installed
- Python3 with tk (tk is separate on Ubuntu: python3-tk)
References:
- https://ffmpeg.org/ffmpeg-all.html
- https://github.com/slhck/ffmpeg-normalize
- https://dsp.stackexchange.com/questions/736/how-do-i-implement-cross-correlation-to-prove-two-audio-files-are-similar
Within Python:
from syncstart import file_offset file_offset
To install for user only, do:
pip install --user syncstart
syncstart from_s10.m4a from_gopro.m4p syncstart from_s10.m4a from_gopro.m4p -t 10 syncstart from_s10.m4a from_gopro.m4p -t 30 syncstart from_s10.m4a from_gopro.m4p -sndl 0
MIT