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Editor needed to sync sound to video

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Ramaa Mosley
Editor needed to sync sound to video
on Oct 7, 2017 at 3:54:24 am

One of our high school student directors finished her first feature film. Very exciting! Except that she did not properly sync the sound to the video and it needs to be done before we can edit. There is approximately 25 hours of footage and the sound is separate from the video. There is a guide track on the video but the higher quality sound is in separate files. The challenge is that there is no time code nor any slate so the sound syncing has to be done by watching and listening.

We anticipate that this job will take 3 people 1 week. Or a single person 3 weeks. This would be an ideal project for an overseas team.

We will ship you the hard drive which is organized into folders based on the shoot days. The sound clips and the video clips then need to be put in sync. Ideally, at the end of each day the finished files would then be posted to our online dropbox.

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Patrick Donegan
Re: Editor needed to sync sound to video
on Oct 21, 2017 at 3:42:40 am

Sure - I could do this.
How much is the pay?

And is there some reason that the Director is not willing to do this?

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Ht Davis
Re: Editor needed to sync sound to video
on Jun 2, 2018 at 6:49:53 pm

With sound, sync can be done with premiere 2018 or by lining up specific spikes. This isn't very fast if you have 25 hours of footage with different files all over. I'd go with plural eyes by red giant software.

If you use premiere or AVID you're in luck, as there's a way to get your sequence into pluraleyes.
You'll have to have all the audio files in separate folders; this may have changed but I recall this having been a problem for me. I had to put them into folders of their own so that they were seen as different sources. If they are different lengths than your video clips, this is extremely important. You'll have to let it resample your original audio, but that doesn't usually take long. Once done, you can sync. It should line up the audio clips in separate channels where it has to.

Another way to do this, so that it actually happens outside your sequence is to give each video file to plural eyes, and have it output a sequence of xml when it syncs. That way, you can import each one as a sequence. From there you can either output the sequences, or just line them up over your others, trim them down, and delete the original track when you're done.

To do this by hand, you'll need several things to be in order. First, all the old audio must be ripped from the video and resampled to match the sample rate of the high quality, then reattached to the video, the sequence should be set so that it can contain the high quality sample rate, and the low quality audio reattaches to the video, then the files are relinked. Second, each clip needs it's own folder with both it's audio files. Third, the high quality audio must start before the video audio or end after (the reason is simple enough--if you start before, it can be trimmed down to align front to front, so that the clips will properly accept it, if you end after, same thing; the only caveat is that there may be at least a short run at either end with no audio, but this too can be handled-->resample the low quality, copy this missing area into the high). Lining up the audio then becomes just listen and watch; listen to the sound, watch the waveform. Where two areas are similar, line them up close until any difference is too difficult to tell by ear, then compare the spikes in the waveforms, and line those up, which shouldn't be difficult. If the sample rates don't match, this is nearly impossible.

By far, your best option is this:
put each video file through pluraleyes along with it's audio, and send it to an xml sequence or have pluraleyes replace the audio and create a new file. The new file then gets relinked to the video. The new file method only works perfect if your higher quality audio is longer at both ends than the entire video. Using the XML export method, you get sequences for replacing your video in your sequence. You'll have to redo your transitions. Of course, you could try the plugin for pluraleyes, and see if it will align everything for you, then you'll just have to export to xml, trim the good audio to fit on one track, copy all that to your original sequence and go. However, the processing of this last method may run a long time. Hours. But it's probably the fastest workflow.

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