Latest post Wed, Mar 1 2017 5:18 AM by Yannik. 7 replies.
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  • Wed, Jun 15 2016 4:43 AM

    • dreid
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    Choppy 4K playback MC 8.5.3

    I am working in a UHD project, I have imported quick time movies with DNxHR 4:4:4 ... this is an online edit computer.  Playback in timeline is stuttering and choppy at random times.  There are NO blue, red or yellow lines on the timeline, nothing to indicate slow hard drives (I get over 1000MB/s on my fast RAID 5, and yes NO drive indexing on the RAID) and surely my system could not be wanting, I have dual 10 core zeons and 128GB RAM.  With all this speed under the hood, stuttery playback is definitely not expected.  Wondering if anyone out there can share any insight.  Specifically, if there are no red or yellow lines in my timeline, then why is the playback sub-par?

    MC 8.5.3, DNxIO w/ 10.5.4, Win 7 Pro 64 bit SP1, Dell 7910, Dual 10 core Xeon 3.10, 128 GB DDR4 RAM, Quadro K5200, 1 TB SSD system drive, 1 TB SSD cache... [view my complete system specs]

    And back to a windowless room full of Avids he goes.

  • Wed, Jun 15 2016 1:53 PM In reply to

    Re: Choppy 4K playback MC 8.5.3

    Do you have a video I/O device? If yes, try disabling it.

    Check the Avid Console during playback. It might provide more info.

    Storage is connected via Thunderbolt?

     

    MC 8.6.1, Windows 10, ASROCK X99M, Intel 5930K, Zotac GTX970, 32GB RAM, Transcend 512GB M.2 SSD & Dell U2713H. MBP 2012 Thunderbolt, OSX 10.10.5, MC... [view my complete system specs]
  • Wed, Jun 22 2016 6:38 PM In reply to

    • dreid
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    Re: Choppy 4K playback MC 8.5.3

    Hi Dom.  NO video IO device yet.  Storage connected via Thunderbolt 2 yes.  Am getting 1000MB/s read/write.  Sadly, I do not have my proper monitoring in place yet, I am mid-build on this edit suite.  I am only viewing via the full screen playback feature.  I am starting to think that the stuttery playback is the computer monitor(s) not being able to process the signal properly (???).  Either that or there is some sort of mismatch between my online graphics bit rate and the monitor's bit rate (does that even make sense?) or the Avid's bit rate which I set on import.  (In other words, the online graphics were rendered at DNxHR HQX 4:4:4 ... but I am not able to import at that resolution, only have 12 bit 4:2:2 resolutions available on the import.  Could that possibly cause the full screen playback and/or the composer monitor playback to be choppy???).    I am installing my DNxIO soon and I will report back as to how performance increases/changes.  

    I am wondering if anyone knows if the ABSENCE of any lines (blue,red,or yellow) means simply that there is no playback issue at all.  In other words, will the lines always be there as a warning any time there is even the slightest hiccup in the playback or the timeline?

    MC 8.5.3, DNxIO w/ 10.5.4, Win 7 Pro 64 bit SP1, Dell 7910, Dual 10 core Xeon 3.10, 128 GB DDR4 RAM, Quadro K5200, 1 TB SSD system drive, 1 TB SSD cache... [view my complete system specs]

    And back to a windowless room full of Avids he goes.

  • Wed, Jun 22 2016 8:55 PM In reply to

    • DStone
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      Moderator: MCA Mac
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    Re: Choppy 4K playback MC 8.5.3

    Dreid, if your monitors are not 4K monitors, then MC has to downres the video in real time in order to play it. That could easily cause choppy playback.

    DIY quad core I7-4790K, 32Gb, NVidia GTX 970 4GB, Win 10 Pro, MC(generally the latest or the one just before), MC 7.x [view my complete system specs]

    Dave S.

  • Sun, Jun 26 2016 2:37 PM In reply to

    • luca.mg
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    Re: Choppy 4K playback MC 8.5.3

    Dreid, try to increase the video memory size in the Media cache settings.

    Symphony 2018.12.3, BM Intensity Pro 4k, Windows 10, i7-5930K, 32 GB ram, Quadro K620 [view my complete system specs]

    peace luca

  • Mon, Aug 1 2016 5:12 AM In reply to

    • dreid
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    Re: Choppy 4K playback MC 8.5.3

    I just wanted to follow up on this: my Media Cache setting is at 64GB (on my 128 GB system) that wasn't the problem. Media drives getting 1000 MB/s read/write, that's not the problem.  The stuttering playback was indeed caused by simply looking at 4K video on non-4K Dell computer monitors.  Full screen playback is a nice feature, but of course I can have no confidence in the signal, either for resolution or color.  I now have my 4K client monitor connected via HDMI 2.0 and SDI (fed by the DNxIO) and the playback is smooth in 4K.  Thanks all for your good suggestions.

    MC 8.5.3, DNxIO w/ 10.5.4, Win 7 Pro 64 bit SP1, Dell 7910, Dual 10 core Xeon 3.10, 128 GB DDR4 RAM, Quadro K5200, 1 TB SSD system drive, 1 TB SSD cache... [view my complete system specs]

    And back to a windowless room full of Avids he goes.

  • Mon, Aug 1 2016 12:32 PM In reply to

    • luca.mg
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    Re: Choppy 4K playback MC 8.5.3

    Thank You for telling!

    Symphony 2018.12.3, BM Intensity Pro 4k, Windows 10, i7-5930K, 32 GB ram, Quadro K620 [view my complete system specs]

    peace luca

  • Wed, Mar 1 2017 5:18 AM In reply to

    • Yannik
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    • Joined on Sat, Sep 12 2015
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    Re: Choppy 4K playback MC 8.5.3

    You can get a smooth workflow of 4K video on Avid by using a Proxy file, for the detailed steps, please visit:

    http://resources.avid.com/SupportFiles/attach/HighRes_WorkflowsGuide.pdf

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