Latest post Wed, Jun 30 2021 7:24 AM by Mercer. 6 replies.
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  • Fri, Jun 25 2021 7:27 AM

    • Brad
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    • Joined on Thu, Oct 13 2005
    • West Yorkshire
    • Posts 117
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    stuttering play, with new more powerful computer

    Hi all.

    For years I've been editing on an iMac from late 2012, but finally got too fed up with slowness.

    This past week I installed a shiny new 2020 imac 3.6ghz 10 core with the best possible GPU (5700XT with 16gb).  I've been surprised to see that on a sequence with a simple HD AMA clip and a title on it, I'm still getting the dreaded yellow and red lines above the timeline causing playback stutter.  Someteimes even after rendering.

    Surely this cannot be and there are some settings I can adjust.

    Does anyone have some tricks up their sleeves to get rid of this annoying problem?

    FYI I have it on the yellw/green quality view setting.

    Thanks,

    Brad

    imac 2020 3.6 GHz 10 Core Intel Core i9 AMD Radeon Pro 5700XT 16Gb 64 GB RAM 2667MHz DDR4 OS 11.3.1 MC 2021.6 [view my complete system specs]
  • Fri, Jun 25 2021 8:05 PM In reply to

    • bonang
    • Top 500 Contributor
    • Joined on Thu, Oct 13 2005
    • Boston, MA
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    Re: stuttering play, with new more powerful computer

    What are your media settings, and what type of drive does the media reside on?

    Avid MC 2021.9 with Symphony option | HP zbook 17" G3 / i7 6820HQ / 32GB RAM / 512GB SSD / WIN 10 PRO 64 / nVidia m3000m w/ 461.72 driver / BMD UltraStudio... [view my complete system specs]

    Keith

  • Sat, Jun 26 2021 11:15 AM In reply to

    • Brad
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    • Joined on Thu, Oct 13 2005
    • West Yorkshire
    • Posts 117
    • Points 1,625

    Re: stuttering play, with new more powerful computer

    Thanks for the response. The AMA clips are a mix of some stuff on my insternal SSD hard drive and some things on a USB-C Lacie Rugged 4TB drive connected via thunderbolt port. Clips are a mix of media.

    For example includes the following:

    Transcoded clips to DNxHD LB (HD 1080p)

    AVC Long-GOP High HD 1080 AMA linked with UME

    H.264 

    But seriously, here's a screen shot of a section where there's hardly anything, a transcoded clip, some temp text from Avid titler+ ( hate it by the way), and some music.  Surely something's not right here...

     

     

    imac 2020 3.6 GHz 10 Core Intel Core i9 AMD Radeon Pro 5700XT 16Gb 64 GB RAM 2667MHz DDR4 OS 11.3.1 MC 2021.6 [view my complete system specs]
  • Mon, Jun 28 2021 10:39 AM In reply to

    • Brad
    • Not Ranked
    • Joined on Thu, Oct 13 2005
    • West Yorkshire
    • Posts 117
    • Points 1,625

    Re: stuttering play, with new more powerful computer

    The media's on a USB-c drive.  Blackmagic speed test clocks it at 120 MB/s write 131 read.

    Generally using AMA linked HD of different codecs, (h.264, etc)

    But strangely Titler+ seems to be causing problems.

    For instance there's one patch where there's an AMA HD clip, a title, and some music, and it's struggling.  Surely can't be right.

     

    imac 2020 3.6 GHz 10 Core Intel Core i9 AMD Radeon Pro 5700XT 16Gb 64 GB RAM 2667MHz DDR4 OS 11.3.1 MC 2021.6 [view my complete system specs]
  • Mon, Jun 28 2021 7:13 PM In reply to

    • bonang
    • Top 500 Contributor
    • Joined on Thu, Oct 13 2005
    • Boston, MA
    • Posts 412
    • Points 5,150

    Re: stuttering play, with new more powerful computer

    Titler+ doesn't seem to playback anything in RT w/out rendering. 

    Avid MC 2021.9 with Symphony option | HP zbook 17" G3 / i7 6820HQ / 32GB RAM / 512GB SSD / WIN 10 PRO 64 / nVidia m3000m w/ 461.72 driver / BMD UltraStudio... [view my complete system specs]

    Keith

  • Wed, Jun 30 2021 1:14 AM In reply to

    • Buzzkill
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    • Los Angeles
    • Posts 67
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    Re: stuttering play, with new more powerful computer

    Can you get access to a Thunderbolt 3 Raid to test if there's any lag? LaCie Rugged may not be robust enough.

    MC 2021.2|10.15.7|MacPro 16c|96gb|Pro Vega 2|Kona 5|Pegasus32 R8,R4i|Prism ADA8XR|XDR,LG 24MD4KL,Sony PVM2541 [view my complete system specs]
  • Wed, Jun 30 2021 7:24 AM In reply to

    • Mercer
    • Top 150 Contributor
    • Joined on Thu, Apr 15 2010
    • UK
    • Posts 734
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    Re: stuttering play, with new more powerful computer

    Buzzkill:

    Can you get access to a Thunderbolt 3 Raid to test if there's any lag? LaCie Rugged may not be robust enough.

    Yes it's almost certain to be the hard drive. That's a single spinner speed. I've had many such drives during remote work from TV companies, all for UK broadcast just HD, usually only DNxHD 36 too and every one struggles. First thing I do is txfr them all to a series of relatively cheap MyBook Duo raids (great because you can disable polling and they are WD Reds). Even using the original drive with an Apple adaptor TB2>TB3, if it has it, is a vast improvement. The raids work fine with USB-C 3.1.

    MC with Symphony option, 2021.6, HP ZBook 17 G5, i7-8850H 6 core/64GB ram/512 M2 ssd/Nvidia Quadro P5200/16GB/FHD, HP Thunderbolt Dock G2, BMD Ultrastudio... [view my complete system specs]
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