On Tue, 18 Dec 2018, Carl Zwanzig wrote:
2018-12-18 12:36 GMT+01:00, Joshua Grauman <[email protected]>:
I have two video cameras recording an event 30 minutes long.[...] 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.
So, effectively you have two -different- videos. To a human, they may sound
and look mostly the same, but really they're different. "be able to be
synced" does not necessarily imply "easy to be done" here. (If they had the
same audio feed, it would be much easier. Heck, if they both recorded real
timecode, it would be almost trivial.)
Or are you searching for an automated process to get two independent
video in-sync?
If that's the goal, there needs to be a readily identifiable sound or visual
marker at the start of the videos as a sync point, then a process to -find-
those and get a timecode. The process also needs to know what that marker is
to look for it. There's a non-trivial amount of processing involved to find
and make the identification.
If this is an occasional task, you're better off opening the two videos in an
editor and sliding the timelines around so they match.
Yes, two different videos but which should be strongly correlated. I found
some code to compute cross-correlation which should work, see my previous
post. Thanks for the suggestion about an easy to find marker, such as a
'clap' or something, that could also come in handy.
And sorry for top-posting in my last post. Bad habit...
Josh
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