Latest post Thu, Dec 3 2020 6:45 PM by Jan Klier. 24 replies.
Page 1 of 2 (25 items) 1 2 Next >
Sort Posts: Previous Next
  • Thu, Sep 10 2020 10:57 PM

    • mtahir
    • Top 200 Contributor
    • Joined on Thu, Oct 13 2005
    • UK
    • Posts 561
    • Points 6,885

    Audio Delay Compensation

    Is there a way of delaying the video to compensate for an audio plugin that's used for an entire track which then delays the audio?

    For example, I was using iZtope RX6's De-click for an entire track and it delays the audio. It does give you a precise measure of the delay but not sure what to so with that number.

    The workaround is to put the effect on each clip and render.

    Thanks

    MC2022.12 (Win10) | DaVinci Resolve Studio | Dell T7500 with 2 x 6-Core Intel Xeon X5690 3.46GHz CPUs | Triple-Channel 96GB (48GB per CPU) 1333MHz DDR3... [view my complete system specs]
  • Fri, Sep 11 2020 7:15 PM In reply to

    Re: Audio Delay Compensation

    Do you mean it is gradually drifting out of sync as time goes on? 

    Media Composer 2021.03 Symphony Phrase Find Script Sync Dell XPS 8940 Intel(R) Core(TM) i9-10900 CPU @ 2.80GHz 2.81 GHz 10cores 96.0 GB RAM NVIDIA... [view my complete system specs]

    "Don't go by my script, they're always wrong." - producer to me while editing

  • Sat, Sep 12 2020 12:04 AM In reply to

    • mtahir
    • Top 200 Contributor
    • Joined on Thu, Oct 13 2005
    • UK
    • Posts 561
    • Points 6,885

    Re: Audio Delay Compensation

    No Scott - it's a fixed delay.

    Because it's a track effect and it's being done in realtime, you can't render it. iZotope will tell you exacly how much the audio is being delayed by. It happens with the De-click effect as that requires some heavy processing.

    You could go in there and shift the video track along by that amount but that will make a mess of the timeline. The idea is that you feed that delay into whatever tool your using so the compensation takes place in the background and audio & video are back in sync. I suspect that this is something you can do in a DAW like Pro Tools.

    iZotope do have something called RX Connect. This allows you take the audio from a clip into the standalone tool, do the necessary repairs etc., and then it sent back to your timeline. That stops the need to export/import audio manually every time you want to make a change as it's all done in the background. Avid gave RX6 Elements as part of the Loyalty Offer. Unfortunately, you need the Standard version of iZotope to get RX Connect.

     

    MC2022.12 (Win10) | DaVinci Resolve Studio | Dell T7500 with 2 x 6-Core Intel Xeon X5690 3.46GHz CPUs | Triple-Channel 96GB (48GB per CPU) 1333MHz DDR3... [view my complete system specs]
  • Sat, Sep 12 2020 6:52 PM In reply to

    • BarkinMadd
    • Top 25 Contributor
    • Joined on Fri, Nov 4 2005
    • Ontario, Canada
    • Posts 4,821
    • Points 63,225

    Re: Audio Delay Compensation

    I don't have much experience with this but that sounds like a bug in iZotope - given that it knows how much it has delayed the audio, I wonder why it doesn't shift it back when rendered so that the rendered result is sync'd with the original audio? As I say, I don't have much experience with this so maybe I am missing the obvious.

    Sorry - reading more closely I see that you are referring to this problem before rendering - is that true? When rendered is everything back in-sync (i.e., if you export the sequence is the export sync'd correctly)?

     

    MC 2021.6 | QT 7.7.9 | Continuum 2021 | Sapphire 2021 | Mocha Pro 2021 | Titler Pro 7.7 | Windows 10 Pro x64 (21H1) | System: Asus x299, i9-7940X (4.1GHz... [view my complete system specs]

    Steve

    ______________________

    www.nelliedogstudios.com

  • Sun, Sep 13 2020 2:14 AM In reply to

    • mtahir
    • Top 200 Contributor
    • Joined on Thu, Oct 13 2005
    • UK
    • Posts 561
    • Points 6,885

    Re: Audio Delay Compensation

    This is a audio track effect you apply through the Audio Track Effect Tool. So, there is no rendering involved - you can't render it. All iZotope are saying is that that using this effect will cause an X number of miliseconds delay. It's all being done in realtime.

    It's convenient in that you apply the effect to all the clips at once and not have to render. The idea is that you compensate the video with that amount of delay. The alternative is to put the effect on each clip and render.

    I think iZotope can explain it bettter than I can: https://support.izotope.com/hc/en-us/articles/360033886113-Latency-and-Delay-Compensation

    MC2022.12 (Win10) | DaVinci Resolve Studio | Dell T7500 with 2 x 6-Core Intel Xeon X5690 3.46GHz CPUs | Triple-Channel 96GB (48GB per CPU) 1333MHz DDR3... [view my complete system specs]
  • Sun, Sep 13 2020 2:15 AM In reply to

    • mtahir
    • Top 200 Contributor
    • Joined on Thu, Oct 13 2005
    • UK
    • Posts 561
    • Points 6,885

    Re: Audio Delay Compensation

    This is a audio track effect you apply through the Audio Track Effect Tool. So, there is no rendering involved - you can't render it. All iZotope are saying is that that using this effect will cause an X number of miliseconds delay. It's all being done in realtime.

    It's convenient in that you apply the effect to all the clips at once and not have to render. The idea is that you compensate the video with that amount of delay. The alternative is to put the effect on each clip and render.

    I think iZotope can explain it bettter than I can: https://support.izotope.com/hc/en-us/articles/360033886113-Latency-and-Delay-Compensation

    MC2022.12 (Win10) | DaVinci Resolve Studio | Dell T7500 with 2 x 6-Core Intel Xeon X5690 3.46GHz CPUs | Triple-Channel 96GB (48GB per CPU) 1333MHz DDR3... [view my complete system specs]
  • Sun, Sep 13 2020 5:07 PM In reply to

    Re: Audio Delay Compensation

    I'm not sure you are going to find an easy solution to fix an issues created by a plugin.

    Can you not just save a preset of the effect to your bin, then select all clips and batch apply it to all clips?

    Sounds like the solution on your end is to not have it do the entire timeline at once...convenient as it sems...doesn't really sound too convenient at all if it buggers everything else up.

    Current Avid-Z390 Win 10 Intel i9 64gig ram Nvidia A5000 MC current level - Win 10 64 Gig Ram [view my complete system specs]
  • Sun, Sep 13 2020 5:10 PM In reply to

    Re: Audio Delay Compensation

    Acually, i just read their explaination. 

     

    Sounds like they are saying. "ya we know we've buggered up your sync...maybe you can fix it somewhere else"

    Not what I want to hear.

    Current Avid-Z390 Win 10 Intel i9 64gig ram Nvidia A5000 MC current level - Win 10 64 Gig Ram [view my complete system specs]
  • Mon, Sep 14 2020 11:37 AM In reply to

    • DStone
    • Top 25 Contributor
    • Joined on Fri, Nov 4 2005
    • Massachusetts
    • Posts 3,968
    • Points 50,645
    • Moderator: MCA Mac
      Moderator: MCA PC
      Moderator: Media Composer Getting Started

    Re: Audio Delay Compensation

    There are a couple of console commands that you can try to use and see if you can get your playback into sync. These are:

    moncondel frames - delay the video by the number of frames indicated.

    desktop play delay frames - delay the audio by the number of frames indicated.

    Note that these are both temporary. You have to reset them each time you go into Media Composer. Also these are global commands which will affact all of your playback, so you have to reset them to zero for timelines without the real-time Izotope filter.

    DIY quad core I7-4790K, 32Gb, NVidia RTX 2060 Super 8, Win 10 Pro, MC (generally the latest or the one just before) [view my complete system specs]

    Dave S.

  • Mon, Sep 14 2020 2:39 PM In reply to

    • Marianna
    • Top 10 Contributor
    • Joined on Thu, Oct 13 2005
    • Avid
    • Posts 11,896
    • Points 259,770
    • ! Avid Employee
      !Avid Customer Advocate
      Avid Beta Moderators
      Avid Developer Moderator
      ForumsAdministrator
      Moderator: Edit on Demand
      Moderator: SSAI PHAI
      SystemAdministrator

    Re: Audio Delay Compensation

    HI there

    Created a case 04018094 and asked support to reach out to our develoepr contact and see about connecting with iZotope and see what the scoop might be.

    Marianna

    Sr. Director | Customer Experience and Community [view my complete system specs]
  • Mon, Sep 14 2020 7:26 PM In reply to

    • jef
    • Top 25 Contributor
    • Joined on Sun, Feb 26 2006
    • Maryland
    • Posts 4,181
    • Points 50,460

    Re: Audio Delay Compensation

    mtahir:

    This is a audio track effect you apply through the Audio Track Effect Tool. So, there is no rendering involved - you can't render it. All iZotope are saying is that that using this effect will cause an X number of miliseconds delay. It's all being done in realtime.

    Well, you CAN do an audio MIXDOWN of such a track.  That is, in effect, rendering it.

    Jef

    Avid DS 11.0.2 R.I.P | MC "Well, it depends ..." 2023.3.1 iMac w Big Sur and 2018.12.7 on Windows 10 Boot Camp [view my complete system specs]

    _____________________________________________

    Jef Huey

    Senior Editor

  • Mon, Sep 14 2020 10:41 PM In reply to

    • mtahir
    • Top 200 Contributor
    • Joined on Thu, Oct 13 2005
    • UK
    • Posts 561
    • Points 6,885

    Re: Audio Delay Compensation

    Thanks Jef.

    One thing I noticed after the mixdown is that I couldn't align the audio with the original. The delay isn't on a frame boundary but it seems to be ok.

    I'm still playing with the parameters, so I don't want to do a mixdown until the end. I'll just have to live with the delay. I suppose I don't really need to look at the picture as it's just the audio I'm processing.

     

    MC2022.12 (Win10) | DaVinci Resolve Studio | Dell T7500 with 2 x 6-Core Intel Xeon X5690 3.46GHz CPUs | Triple-Channel 96GB (48GB per CPU) 1333MHz DDR3... [view my complete system specs]
  • Tue, Sep 15 2020 1:56 AM In reply to

    • jef
    • Top 25 Contributor
    • Joined on Sun, Feb 26 2006
    • Maryland
    • Posts 4,181
    • Points 50,460

    Re: Audio Delay Compensation

    mtahir:

    Thanks Jef.

    One thing I noticed after the mixdown is that I couldn't align the audio with the original. The delay isn't on a frame boundary but it seems to be ok.

    I'm still playing with the parameters, so I don't want to do a mixdown until the end. I'll just have to live with the delay. I suppose I don't really need to look at the picture as it's just the audio I'm processing.

    I would imagine that this is because the processing delay is in samples which do not add up to a complete video frame.  If you figure out exactly how much processing delay the de-click tool is creating, you could add another of the RT effects to the track which lets you add more delay.  Do some math and experiments and you could get it to be an even frame and then slip the track back by a frame.

    Jef

    Avid DS 11.0.2 R.I.P | MC "Well, it depends ..." 2023.3.1 iMac w Big Sur and 2018.12.7 on Windows 10 Boot Camp [view my complete system specs]

    _____________________________________________

    Jef Huey

    Senior Editor

  • Tue, Sep 15 2020 6:16 PM In reply to

    • mtahir
    • Top 200 Contributor
    • Joined on Thu, Oct 13 2005
    • UK
    • Posts 561
    • Points 6,885

    Re: Audio Delay Compensation

    I think the number is in milliseconds. That's an interesting idea. Thanks.

    MC2022.12 (Win10) | DaVinci Resolve Studio | Dell T7500 with 2 x 6-Core Intel Xeon X5690 3.46GHz CPUs | Triple-Channel 96GB (48GB per CPU) 1333MHz DDR3... [view my complete system specs]
  • Wed, Sep 16 2020 8:17 PM In reply to

    • jlomicka
    • Not Ranked
    • Joined on Thu, Feb 4 2010
    • Posts 40
    • Points 540
    • ! Avid Employee
      Avid Developer Moderator

    Re: Audio Delay Compensation

     Since version 8.1, Media Composer will play and mix down with delay compensationapplied, but it is limited to 16K samples (at 48Khz sample rate). When the plug-in requires more than 16K samples of delay compensation, as in this case, there will be some slip.

Page 1 of 2 (25 items) 1 2 Next >

© Copyright 2011 Avid Technology, Inc.  Terms of Use |  Privacy Policy |  Site Map |  Find a Reseller