Latest post Sat, Mar 16 2019 5:36 PM by bushfilm. 21 replies.
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  • Sat, Mar 9 2019 8:45 PM

    • bushfilm
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    video playback

    Hi all,

    I have a minor issue with video playback. My previous computer had a RAID 0 array and a pretty low end video card, I think it was an nVidia Geforce but wasn't very expensive. I was working mostly in DV video at the time, and the computer had no problem playing video back smoothly.

    Now I have a new (home built) computer with 16gigs of RAM, an i7 processor and an nVidia video card, a Geforce model. Not sure of model number but mid range. Regular hard drives (SATA III), no RAID. I am working in full HD, mostly using .mov files shot with a Panasonic GH3, at highest quality setting.  Even in the low-rez (yellow) mode, I am getting some skipping and stuttering when I try to play back these files. I don't use AMA linking, just regular import of clips into bins. Some clips play back fine, many do not. Some stuttering at DNxHD 145, almost no playback at DNxHD 200 or higher. I believe at lower DNxHD rates, like 75 or 45, playback improves.

    I guess my question is: knowing that I need more video power to play these clips back, should I increase RAM to 32gbs, add a RAID 0 array, or upgrade my video card? Or some combination of these? Any light you could shine on this would be greatly appreciated. Thanks in advance!

  • Sat, Mar 9 2019 9:19 PM In reply to

    Re: video playback

    If you look on the timecode track in the areas where you get stuttering playback, do you see any red/yellow/blue lines to indicate why it might be stuttering? Blue means it's a drive speed issue and yellow means it's a CPU issue.

    More details here: http://avid.force.com/pkb/articles/en_US/Troubleshooting/en274819

    Media Composer 2018.12.1 w/Symphony/SS/PF options, HP Envy 17t-j100 Quad Edition laptop, Windows 10 Pro, Intel Core i7 2.4GHz, 16 GB RAM, nVidia GeForce... [view my complete system specs]

    "There is hardly anything in the world that some man cannot make a little worse and sell a little cheaper, and the people who only consider the price are this man's lawful prey."  - John Ruskin (1819-1900)

     

    Carl Amoscato | Freelance Film & Video Editor | London, UK

  • Sun, Mar 10 2019 1:02 AM In reply to

    • bushfilm
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    Re: video playback

    Well, I re-started the computer and the timeline plays back fine now. Take the car to the mechanic and it stops making the funny noise, go figure. But just for the sake of argument, which of the above upgrades would you recommend to increase/improve playback quality? Because I'm sure that the DNxHD 200 stuttering problem is still there. What should I do to gain more playback quality, especially if I get some 4K footage to edit? Thanks!

  • Sun, Mar 10 2019 7:33 AM In reply to

    Re: video playback

    I'm sure one of the more computer-savvy people will come along with ideas about where you should start. At this point I don't have enough information to point to one component over another.

    Media Composer 2018.12.1 w/Symphony/SS/PF options, HP Envy 17t-j100 Quad Edition laptop, Windows 10 Pro, Intel Core i7 2.4GHz, 16 GB RAM, nVidia GeForce... [view my complete system specs]

    "There is hardly anything in the world that some man cannot make a little worse and sell a little cheaper, and the people who only consider the price are this man's lawful prey."  - John Ruskin (1819-1900)

     

    Carl Amoscato | Freelance Film & Video Editor | London, UK

  • Sun, Mar 10 2019 8:37 AM In reply to

    Re: video playback

    With SATA media drives, you should be able to play back DNx220 quite well. Anything 4x4 might require faster drives (so a RAID). For 4K, it would depend on the amount of compression you use.

    Media Composer /w Symphony option | PT-HD | Win7Pro64 HP | OSX MBP | ISIS5000 | Nitris DX | Artist Mix & Transport & Color | AJA T-Tap | Decklink... [view my complete system specs]
  • Sun, Mar 10 2019 9:14 AM In reply to

    • Bruno M
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    Re: video playback

    Since this problem seems to vary in severity from one restart to another, I would also check what software and processes are running on your computer, which could be using up the system resources.

    Common culprits include anti-virus programs and disk backup software.

    I would also stop background services like Avid's Application Manager and background render and see what difference it makes.

     

    HP Z800, HP G3 Studio, SonnetFusion RAID, Mojo DX, Symphony 2018.9, JVC DTV1910 HD tube monitor, HP Dreamcolor, Avid Artist Color [view my complete system specs]
  • Sun, Mar 10 2019 10:39 PM In reply to

    • bushfilm
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    Re: video playback

    Upon closer inspection (means I got lucky) I discovered there were, in fact, small yellow lines and some red dots in the bottom of the timeline when the stuttering occurred. Yellow means a CPU issue. I have a pretty good CPU, an i7 that is, I believe, 3.07ghz. Should work with HD video. Are there background programs running which I could shut off? Also, what do the little red dots mean? 

    Appreciate your help.

  • Mon, Mar 11 2019 8:15 AM In reply to

    • BenoitM
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    Re: video playback

    Bruno M:

    [...] I would also check what software and processes are running on your computer, which could be using up the system resources.

    [...]

    @bushfilm

    For this I would first look at Windows' "Task Manager" and/or "Resource Monitor".

    Check the important counters (CPU, disk I/O) with and without MC playing a clip.

    This will give you some clues about processes eating significant part of your CPU cycles or disk I/O.

    HTH

    MC 2018.12.1 (Symphony option)/BCC 10.0.5/RED 5.6; BlackMagic Ultrastudio Mini Monitor (11.0.0.0); DELL Precision 5530 - Intel Core i7-8850H 2.6 GHz -... [view my complete system specs]
  • Mon, Mar 11 2019 9:26 AM In reply to

    Re: video playback

    bushfilm:
    Also, what do the little red dots mean? 

    From the article I posted earlier:

    Avid KB:
    Yellow Bars - Indicate the area is stressing the CPU during playback but not to the point of dropping frames.

    Blue Bars - Indicate the area is stressing the drives but not to the point of dropping frames.

    Red Bars - Indicates the area has taxed the system to the point of dropping frames.

    Media Composer 2018.12.1 w/Symphony/SS/PF options, HP Envy 17t-j100 Quad Edition laptop, Windows 10 Pro, Intel Core i7 2.4GHz, 16 GB RAM, nVidia GeForce... [view my complete system specs]

    "There is hardly anything in the world that some man cannot make a little worse and sell a little cheaper, and the people who only consider the price are this man's lawful prey."  - John Ruskin (1819-1900)

     

    Carl Amoscato | Freelance Film & Video Editor | London, UK

  • Thu, Mar 14 2019 6:16 PM In reply to

    • bushfilm
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    Re: video playback

    Hi and thanks.  There seem to be a lot of things running in the background; how would I shut them off? I tried turning off anti-virus, internet and only running Media Composer but still had issues. In fact, if anything, it is worse now, I can't play much of the timeline without stuttering or freezing up. I would think an i7 3.02gz processor, using SATA III drives and 16gb RAM, should be able to playback full HD video, at DNxHD 145? Oh wait, I just noticed a lot of the footage is on an out-board USB 3.0 portable hard drive. 4tb and about half full. I'm guessing this might be slowing up the works. If you can confirm, that would be great. Thanks.

    And I am thinking my next move would be to move this footage to a real SATA III hard drive, or even better a RAID 0 array?

  • Fri, Mar 15 2019 3:52 AM In reply to

    • bushfilm
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    Re: video playback

    Any tips on moving this footage from portable drive to a real hard drive? Pretty sure it's just a matter of copying the footage to the right drive and changing some information pointing to the correct drive. I remember doing this some years back and it wasn't too scary. If anyone can walk me through it, I'd be very greatful. Thanks.

  • Fri, Mar 15 2019 4:00 AM In reply to

    • Fazz Powell
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    Re: video playback

    Create a folder and put everything in there except Avid MediaFiles. That folder, along with your media needs to be on the root of the drive. When you launch Avid you'll want to target that drive for renders etc. 

    MC 2018.10 w/Symphony option. NitrisDX, HP Z800 Dual 2.67Ghz, 96GB Ram, Nvidia M4000, BCC2019, Sapphire2019, TitlePro5, ProTools 10.5,Terrablock 24XS Multi... [view my complete system specs]

    Dan Powell - Take One Digital Media

  • Fri, Mar 15 2019 12:19 PM In reply to

    • Bruno M
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    Re: video playback

    bushfilm:
    I just noticed a lot of the footage is on an out-board USB 3.0 portable hard drive. 4tb and about half full. I'm guessing this might be slowing up the works.

    Yep, that's certainly not going to give you the fastest speeds. I think USB3 drives are OK for lower bandwidth files like DNx36, but I personally try to avoid using this sort of storage for anything else.

    HP Z800, HP G3 Studio, SonnetFusion RAID, Mojo DX, Symphony 2018.9, JVC DTV1910 HD tube monitor, HP Dreamcolor, Avid Artist Color [view my complete system specs]
  • Fri, Mar 15 2019 7:40 PM In reply to

    • bushfilm
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    Re: video playback

    I don't think I'm following you. Create a folder where? Why not Avid Media Files? Aren't I going to need them? I'm not sure what "on the root of the drive" means. Sorry to be such a bobo. I was planning on copying the Avid folder to the new RAID drive I am adding, and then changing the path to the media.  Would this work? Anyone?

  • Fri, Mar 15 2019 8:40 PM In reply to

    • bushfilm
    • Top 200 Contributor
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    Re: video playback

    From my fuzzy past, I seem to remember that you could copy all the individual avid media files into the Avid MediaFiles folder on a different hard drive, then delete the .mdb file from that folder, and then when you re-started the computer, MC could "find" the files and all was well. Is this not an acceptable way to do this?

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