how to synchronise audio tracks on different videos

[oduodui]

Good day gentleman

we shot an event for someone form three cameras . is there a way that i can synchronise the the audio of all the different video clips?? perhaps with ffmpeg ??

there is one big video of 2 hours 33 minutes from one video and many smaller clips from the other two cameras. i want to know how to synchronise the audio from these clips from the diffrent cameras ??

so that i can get the correct times for editing the shakes out buy going to another camera(different view) for the duration of the bad part of that video.

thanks

[smrpix]

You can throw all your shots on the timeline of a proper NLE -- Sony Vegas Movie Studio is a good, inexpensive one. AviUtl is free but harder to learn -- and sync them up either visually to cues in the picture or to spikes in the waveform of the audio track.

PluralEyes is an excellent tool for syncing cameras automatically by comparing soundtracks.

Premiere Pro CC will also automatically sync by audio and allow you to edit in true multicam. If you can learn it within a month there's a free trial. (And the monthly fee isn't too bad if your project takes longer.)

In all cases you may run into trouble if the cameras run at slightly different speeds and will need to make manual adjustments.


FFmpeg is a marvelous tool, but if you attempt to use it for this task you will be well into the next decade before you are ready to start actually editing.

[Cornucopia]

Depends on your camera, but you might also be able to use DSLRsync (which now seems only available at this site).

Question: are ANY of your audio clips continuous? Did you shoot double system?

Hopefully, the audio from your 2hr33min video is continuous, and even more hopefully, good quality. If it is, there is no need to use the audio from any of the other cams (unless you need to mix in the sound from a different perspective). So it is more about matching the audio (temporarily) so that you have proper frame sync with the video angles.

+1 with smrpix: you need a good NLE that supports multiple V+A layers to do this. Multicam would be even better, but I doubt you will be able to fully take advantage of that.

Regardless, expect many, many hours of dull work ahead.

Scott

[oduodui]

Hi all thanks

the replies are very helpful.

Yes the 2:33 shot was continuous.

[oduodui]

how does shotcut and pinnacle compare as NLe 'S ??

[newpball]

Good day gentleman

we shot an event for someone form three cameras . is there a way that i can synchronise the the audio of all the different video clips?? perhaps with ffmpeg ??

there is one big video of 2 hours 33 minutes from one video and many smaller clips from the other two cameras. i want to know how to synchronise the audio from these clips from the diffrent cameras ??

so that i can get the correct times for editing the shakes out buy going to another camera(different view) for the duration of the bad part of that video.

thanks

For the future I cannot stress more to use an external audio recorder for recording live events.

Have an external sound recorder record the event and keep it on for the whole event (you could even use a simple Tascam or Zoom). And unless you run fancy timecode do the same with the cameras just keep them on all the time, much easier to edit afterwards.

For amplified events take advantage of the direct out of the mixer in additional to your own mics but again stick with one principal recorder as mixing sound from different recorders can be problematic.

When you need more than two mics and use the direct out from the event mixer you should opt for more professional solutions like the Roland R-88.

Does it cost money? Of course it does.

But here is a concept, something that many people seem to be completely oblivious to, is that you can rent things that would not be cost effective to own.

Remember for live events you have only one chance to record the audio and video right.

Do it right!

By the way did I mention you need to have a checklist!

[oduodui]

Newpball

All you said is so true

Will do. thanks for the advice !!