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Activity Forums VEGAS Pro Playback and preview slow and stuttering in Vegas Pro11.

  • Playback and preview slow and stuttering in Vegas Pro11.

    Posted by Bruce Quayle on January 30, 2016 at 10:57 pm

    Hi all. I have searched the archives in an attempt to solve my problem, but no luck. So I need help please.
    I am editing material I shot on my Sony EX1r in PAL.
    My edit platform is an HP Pavilion laptop with i7 CPU (Q840@1.87GHz), Nvidia GeForce GT230M, 2 x hard drives, 8GB RAM.
    I am running Windows 10 and Sony Vegas Pro 11.
    In the past I have had no issue editing my material, but now my playback (preview) begins to slow and stutter after just a minute or two of editing. Even simple playback of the clips (events) becomes an static mess. Editing is almost impossible. Although I can still edit smoothly in the trimmer. It’s only when I try to play back from the timeline that this happens.
    I normally use ‘Preview’ in auto mode, but have even gone so far to try ‘Draft in quarter mode…which as you know is horrendous. It speeds up playback for a couple of seconds and then slows down again and stutters in that low quality mode!
    I have checked the ‘Properties’ and made sure that my project settings match my material.
    Field order is set to Progressive.
    Pixel aspect ration is square.
    Pixel Format is on 8 bit.
    Motion blur is Gaussian.
    Interlace method – None.
    I have ticked the box: Adjust source media to match project or render settings.
    I have also checked the ‘Preferences’, but can see nothing wrong there.
    I am not running any other programs while I’m editing.
    My only clue is that I haven’t been using this computer for editing since I converted to Windows 10, so perhaps that has something to do with the issue.
    If anyone could offer any light on this problem I would be very grateful.


    Bruce Quayle replied 8 years, 4 months ago 3 Members · 3 Replies
  • 3 Replies
  • John Rofrano

    January 31, 2016 at 1:25 am

    [Bruce Quayle] “My only clue is that I haven’t been using this computer for editing since I converted to Windows 10, so perhaps that has something to do with the issue.”

    I was going to ask “What has changed?” but you just answered that question.

    Try re-installing Vegas Pro 11. if that doesn’t work, download the trial of Vegas Pro 13 and see if that fixes the issue. Vegas Pro 11 doesn’t support Windows 10 so it may be time to upgrade Vegas Pro but try a re-install first.


  • Aaron Star

    January 31, 2016 at 2:14 am

    There is not a lot of hardware there to edit XDCAM 1080p material, even at only 25P. Proxy editing 720P xdcam, or even SD 16×9 material using Cineform might improve overall experience. Then just switch project file over to the master footage for final render. The fact that your camera already shoots to XDCAM is an optimization right there. You may have to reduce to proxy quality due to low hardware specs.

    Here are a couple things I would try. Verify the latest drivers for Win10 for the following devices:

    Intel Chipset
    NV Video driver
    Sound device
    Bios is latest from HP

    Verify that the heat sinks are not clogged on the laptop, most laptops heat sinks are like dryer lint traps after 6 months.

    Use Speccy to verify heat is not an issue on the CPU, GPU and chipset during playback. Look at the HDD interface speed and make sure it is matched to both controller and drive capabilities. Check the memory speed and make sure it is operating at max speeds for the chipset. Replace the memory if it is not running at max speed for the chipset. Speccy can help with memory speeds, and “WinSAT mem” from an admin command line will verify bandwidth. Then compare the results to what the chipset should be capable of.

    i7-840QM – Memory controller The number of controllers: 1
    Memory channels: 2
    Supported memory: DDR3-1066, DDR3-1333
    Maximum memory bandwidth (GB/s): 21.3

    Run Memtest86+ through at least one full pass of tests. Windows Memory check is not that great, and system memory needs to be 100% error free for proper operation.

    Get a copy of GPU-z from techpowerup and verify that the GPU interface speed is x16 and operating at PCIe 2.0.

    The GPU is only capable of 105 GFLOPs and VP11 recommended an AMD GPU capable of at least 1300 GFLOPS. But the I7 is also not a great performer, so try Vegas with GPU enabled and disabled to see what performs better. Probably disabled will perform better, because you don’t want the GPU to hold the CPU back. GPU-z will also show you if the GPU is assisting at all. XDCAM is optimized to take advantage of the GPU, so a slow GPU might actually make things worse.

  • Bruce Quayle

    January 31, 2016 at 10:23 am

    Hi Aaron and John. Thank you both for taking the time to respond to my query. And thank you for such a detailed reply Aaron.
    I am aware that my laptop isn’t the most powerful these days. It’s just all I have right now. I will work through your suggestions although I’m not as computer literate as you clearly are. Of course I will start with the simplest option which is to reload Vegas as John suggested.
    Thanks again to both of you and to this fantastic forum.


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