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Synchronization of audio and video: About to purchase a computer with Premiere CC 2018

Forum|Forum|7 years ago
December 30, 2018
6 replies
1427 views

Hello.

I am a youtuber and I am doing interviews.

My equipment consists of two speech recorders: DR-05 with a plugged-in MOVO VXR10 and DR-07mkII and a stand-alone camera on a tripod.

All those tracks need to be synched.

I walk around and turn all my equipment by hand. Speech recorders record at a slightly different speed, in relationship to each other and to the camera.

When I tried to find the right product, I decided to stick with DaVinci Resolve for a while. Yet, despite the advertisements, Autosync in Davinci is far from perfect.

How good is Adobe Premiere at stretching or shrinking audio tracks in order to synch them with the video?

If I place markers on different tracks to denote that the tracks are slightly off, would Premiere be able to guess to stretch the recorded tracks?

Can I inch up the length of the track by one frame?

Send me a link to a tutorial where this process is shown in detail, please.

Inching up is why I liked DaVinci for a while.

Does Premiere offer a handy 'inching up' function?

To what decimal place can I stretch or shrink a track?

At this point we couldn't think of anything better then to write a script that 'shims' the audio or removes small slices, in order to compensate for the recording speed errors that my speech recorders produce.

I would like to find a real solution for auto synchronization.

My interviews look professional enough and yet I would really like to not to have to do it entirely by hand.

Is there such script that works from within Adobe Premiere?

Is there a plugin that makes Premiere even better at synchronization?

I heard about such plugin mentioned in the tutorial videos, yet I could never find it.

Right now, I am still uncertain why all the authsynchs in all the programs that I try work so poorly and allow the recording speed error to accumulate, instead of stretching the tracks to make them synch.

Happy New Year.

Thank you.

--Vladimir Tolskiy

This topic has been closed for replies.

Correct answer Meg The Dog

Software solution:

Buy Red Giant Shooter PluralEyes | Audio Video Sync Software

Make sure you understand and are comfortable with the workflow. I believe there is a free trial.

MtD

E

eikonoklastes

Legend

You ideally want to do any audio retiming in Audition, rather than Premiere. While it is technically possible to stretch audio without changing pitch in Premiere, the results aren't really usable, but Audition does a remarkable job at preserving audio integrity after a stretch.

Mo Moolla

Legend

" Speech recorders record at a slightly different speed, in relationship to each other"

Are you recording on tape? I don't understand what you mean with the above statement. Even if your recorders are set to record at different frequency bitrates you should have no issues syncing them all. Audio does not record at different speeds and frame rates like video does. Why are u looking to change "speeds?". What recorders are you using?

Ig you are using small "dictaphone" type recorders you need to get a proper unit like the Zoom series e.h H6N etc

The best solution is Plural Eyes as Meg as mentioned by Meg.

Mo

R

Richard M Knight

Community Expert

Unless locked either by video syncs or wordclock all free running devices will record at a different rate. Most professional cameras will not drift much. My two Sony cameras will be within a frame after 3 hours but my tascam audio recorders will be 2 or 3 frames out after an hour. I have also got an early Zoom recorder and this can be up to a second out after 60 mins. Mobile phones and other consumer devices I expect will be about the same.

It also must be remembered that using timecode does not eliminate these sync issues unless a video reference is used.

Mo Moolla

Legend

Hi Richard. Coming from a background where my projects range from music vids, TVC's and long form I rarely if ever record audio thats longer than a minute> The only exception this would be recording atmos tracks for use in documentaries. The last time I recorded audio for a straight hour was at a conference I was asked to assist with. Shot on SONY EX3 with a EX1 for cutaways. All audio recorded on a Zoom H5N and H4N for backup. Saw slight drift (approximately 2 frames) over the hour.

Use the old fashioned handclap to sync (thought a digital clapperboard would be overkill for a conference )

Mo

E

excited_Genie16B8

Legend

How good is Adobe Premiere at stretching or shrinking audio tracks in order to synch them with the video?

Neither program will do that for you. You'd have to manually adjust the speed of the clip to match the correct length.

But I am surprised you have to. You are recording 24 bit 48 kHz .wav files on the audio devices, yes?

Warren Heaton

Community Expert

In Premiere Pro, you can sync when you merge your video clips with their corresponding audio before you start to edit or you can sychronize at any time in the Timeline by selecting the clips, right-click, and then choose Synchronize.

If you make sure that your camera and your audio field recording are recording at the same sample rate, you should minimize any drift between the two device. Of course, the best approach is to jam sync timecode between all of your devices (make for lighting fast syncing later as well).

M

Meg The DogCorrect answer

Inspiring

Software solution:

Buy Red Giant Shooter PluralEyes | Audio Video Sync Software

Make sure you understand and are comfortable with the workflow. I believe there is a free trial.

MtD

R

Richard M Knight

Community Expert

I have just edited a school concert with two cameras and two free running audio recorders. I trimmed all the tracks to the start of the opening music at the front and the start of the final applause for the tail. The cameras were frame accurate over the one hour recording, the two Tascam audio recorders were about t 3 frames out. I just lined up the start on all the tracks and then used the rate stretch tool to change the end points of the audio:

You can then use the ordinary edit tool to lengthen the top and tail. Took about 3 mins to do.

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