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Audio Auto Sync

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Jacob Brown
Audio Auto Sync
on Jan 25, 2019 at 5:29:26 pm

So I just wrapped a production in which we shot BM cinemaDNG, and external audio. The tascam produced 3-4 tracks that exist as separate files, not as one multi-track file.

My understanding from here is that Resolve can only auto sync a single file to a video clip.

So my question...is there anyway to just convert my 3 separate audio files into a single multitrack so that Resolve can sync it? Or is there another work flow that's recommended?

Thanks!


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Declan Smith
Re: Audio Auto Sync
on Jan 25, 2019 at 8:54:54 pm

I've not found a way that Resolve can do this. I tend to use multichannel files from the external recorder, but if you are presented with separate files, you will need to create multichannel files first.

If you are familiar with the command line, you could try getting and using the command line utility "sox" that will take your separate WAV files and create a multichannel file which you can then sync in Resolve.

e.g.: I have the following:

Scene_12D-T002_Tr1.WAV
Scene_12D-T002_Tr1_D.WAV
Scene_12D-T002_Tr3.WAV
Scene_12D-T002_TrL_R.WAV

sox -M Scene_12D_T002_*.wav Scene_12D_T002.wav

This will create the required multichannel file, but note that you will lose your metadata.

Declan Smith
http://www.madpanic.tv
Davinci Resolve 15.2 / Reason 10 / BlackMagic URSA Broadcast / Zoom F8 / FCPX / Adobe CS6 / FCS3 / Roland R26 / Canon XLH1 / Canon 7D / Cubase

"it's either binary or it's not"


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Michael Gissing
Re: Audio Auto Sync
on Jan 26, 2019 at 8:07:39 am

Sound Devices have free software Wave Agent, that can create poly wavs from single wavs and single wavs from poly amongst other nice timecode things.

https://www.sounddevices.com/support/downloads/wave-agent


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Bouke Vahl
Re: Audio Auto Sync
on Jan 26, 2019 at 11:39:49 am

afaik, Wave Agent does not do RF64 (if you go over the 4 gig limit).
My Bwf Merge app does (get it from my site)
But, this was intended to merge files from different recorders with different start times, so perhaps a bit overpowered for the job.

(And if it's only a few files, why bother and not do it by hand?)

Bouke
http://www.videotoolshed.com


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Jacob Brown
Re: Audio Auto Sync
on Jan 26, 2019 at 2:20:18 pm

thanks -- yeah it's 100's of files, maybe 1000 video files, with 2-4 audio tracks to sync each. Hence need for automation haha


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Bouke Vahl
Re: Audio Auto Sync
on Jan 26, 2019 at 3:21:24 pm

In that case, see if any of the options given work for you.
If not, contact me an I'll make something custom.

Bouke
http://www.videotoolshed.com


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Jacob Brown
Re: Audio Auto Sync
on Jan 27, 2019 at 12:15:00 am

wow that software worked perfectly. Thank you!

of course now resolve is crashing every time I try to sync a handful of my bins. arghh


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