[FFmpeg-user] Comparing audio to sync video

Carl Eugen Hoyos ceffmpeg at gmail.com
Tue Dec 18 20:27:47 EET 2018

2018-12-18 12:36 GMT+01:00, Joshua Grauman <jnfo-c at grauman.com>:

> I have two video cameras recording an event 30 minutes long. I hit start
> on the two cameras at different times. I would like to figure out a
> command-line script that can basically diff the audio to figure out the
> difference between the start times and align the videos. The audio won't
> be exactly identical as they are two different cameras, different mics,
> different locations, but they are both recording an interview, so the
> audio should be able to be synced. Any ideas?

Are you asking how to find out the delay for one pair of videos?
You could use a filter chain and audio visualization to see the

Or are you searching for an automated process to get two independent
video in-sync?

Carl Eugen

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