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Activity Forums VEGAS Pro Interlace breakup

  • Interlace breakup

    Posted by David Pendry on August 2, 2010 at 1:59 pm

    I’ve just spent 3 weeks editing a whole load of footage, rendered it, and transferred it to tape for an initial look-see on a decent-sized screen.
    It was utterly dreadful!
    ANY horizontal movement in the image (and this was bicyles – so there was quite a lot of that!) was split to a degree that the rider would be unrecognisable.
    I gave up trying to use the HD function on my HDR-HC1, as this caused more trouble than it was worth, so everything is now shot in good ol’ SD (until Sony can prove that Vegas really works, that is!)
    When uploading the footage, none of the parameters were changed from the factory default, as I tried this on the earlier Vegas 6, and made things somewhat worse.
    Interestingly, the only parts of the footage that are NOT ‘splitting’ (at all!) are some bits where the individual clip has been ‘compressed’ to speed up the movement.
    These clips are perfect!!!!!

    So – what should I be doing differently to get a result that’s vaguely watchable?
    (I wonder how many of you said: “Get Final Cut…!”)

    If anyone is able to assist, I would be most grateful.

    David.

    ps. the PC was custom-made, purely for the purpose of editing, and was constructed with the tippy-toppest of components.

    John Rofrano replied 15 years, 7 months ago 2 Members · 4 Replies
  • 4 Replies
  • John Rofrano

    August 2, 2010 at 2:25 pm

    There seems to be a problem with your workflow. You will need to provide us with information on your workflow so we can figure out where you may have gone wrong. Let’s start with:

    • What project template are you using?
    • What changes (if any) have you made to the project template?
    • What is the Deinterlace method setting in your project properties?
    • Please confirm that your footage is NTSC MPEG2 720×480-60i (right-click an event and go to Properties | Media tab to check what Vegas thinks it is)
    • What render template are you using?
    • What changes (if any) have you made to the render template?

    BTW, there is no reason not to use HD with your camera but we’ll save that question for later.

    ~jr

    http://www.johnrofrano.com
    http://www.vasst.com

  • David Pendry

    August 3, 2010 at 12:59 pm

    Hi, John.

    Thanks for your hints and tips yesterday.

    I re-rendered the project, but this time I changed the file type to an .AVI file, and that seems to have done the trick!
    The .VEG file version was the terrible one, and this has led me to go back and re-render a whole load of earlier projects!
    It does strike me as a little strange that the results from the factory defaults are so rubbish, and that everybody seems to have so much trouble trying to attain the results they’re after / expecting.

    Anyway, it seems ok for now – but I have little doubt that will change on the next project :-/

    Regards,

    David.

  • David Pendry

    September 30, 2010 at 9:58 am

    Hi, John.
    I read yesterday about rendering using ‘Progressive Scan’.
    It makes sense that this would reduce (at the very least!) the amount of ‘interlace breakup’ – and it has made a fair bit of difference.
    All I have done so far is to re-render an existing project in Progressive Scan, but should I be Capturing Video in Prog. Scan, too?
    (without looking, I can’t remember if that’s possible – my PC’s doing another render of the same project, anyway!)

    One last thing – and this is something I really should know :-/
    Modern, flat-screen TVs….. are they interlaced in the same way as the older-style CRTs?
    I’m almost embarrassed to ask that kind of question – but, if you don’t ask…

    Cheers.

    David.

  • John Rofrano

    September 30, 2010 at 10:47 am

    I read yesterday about rendering using ‘Progressive Scan’.It makes sense that this would reduce (at the very least!) the amount of ‘interlace breakup’ – and it has made a fair bit of difference.

    It only makes sense if you are delivering to a device that is progressive scan like the Internet. If you are delivering to an interlaced device like TV it makes no sense unless you are delivering DV Widescreen 24p which is the only DVD format that supports progressive scan.

    All I have done so far is to re-render an existing project in Progressive Scan, but should I be Capturing Video in Prog. Scan, too? (without looking, I can’t remember if that’s possible

    That is not possible. Your camera shoots HDV which is interlaced. Your capture will always be the same interlaced footage.

    One last thing – and this is something I really should know :-/
    Modern, flat-screen TVs….. are they interlaced in the same way as the older-style CRTs?

    Yes. Interlacing is required for backward compatibility. They also support progressive scan but all TV’s (HD or SD, LCD or CRT) must support interlacing.

    I’m almost embarrassed to ask that kind of question – but, if you don’t ask…

    Exactly… if you don’t ask… you won’t learn. 😉

    ~jr

    http://www.johnrofrano.com
    http://www.vasst.com

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