Latest post Mon, Apr 22 2019 2:40 PM by Isaac T.. 6 replies.
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  • Thu, Apr 18 2019 9:29 PM

    • jmcbrg
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    prog/interlace odd problem

    I should start by saying I have found a workaround, but I'm interested in finding a better one...

    We shot many hours of multi-camera footage at 29.97 1080 progressive, recording with KiPro Ultra plus machines. We saw no problem while in record, but on linking to the footage, we were sad to see what looked like weird interlace problems, similar to what interlace footage looks like when played back on a computer monitor but worse, sometimes only in the botom half of the image, sometimes in the full image.

    We believe we have discovered the cause, when we switched our reference signal from tri-level to black burst it seems to have cleared everything up from that point on, doesn't make a lot of sense, but apparently not all the equipment in the signal path dealt well with the tri-level... but meanwhile we have all this footage that was recorded prior to discovering that, that we needed to find a way to fix.

    After stumbling around a bit, on a whim I imported the progressive footage into an interlace project and found that every other field was okay, and then applied a Saphire film effect with none and none selected for film stock, and chose keep upper field only and on rendering, it is fine.

    The problem is just that we are talking about a good few hours of footage and the rendering time is going to be substantial...

    any brainy ideas floating around for a way to use only the upper field that don't involve long renders?

    MC 2018.11, High Sierra, Mac Pro (Late 2013) 3 GHz 8-core Xeon E5 64 GB ram, AMD D700 [view my complete system specs]

    "Doctor, it hurts when I do this..."

     

    MC 2018.11, High Sierra, Mac Pro (Late 2013) 3 GHz 8-core Xeon E5 64 GB ram, AMD D700

  • Fri, Apr 19 2019 12:23 AM In reply to

    • jef
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    Re: prog/interlace odd problem

    I think if you put a timewarp effect on a clip and  choose the upper most option - duplicate field I think - that may do the same thing.

    A guess.

    Jef

    Avid DS 11.0.2 R.I.P | MC "Well, it depends ..." mostly 8.12.9|OS 10.14.x - iMac Pro 2019 - home system MacPro Dual 2.8 8core GTX680 "Harpertown"... [view my complete system specs]

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  • Fri, Apr 19 2019 10:46 AM In reply to

    • jmcbrg
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    Re: prog/interlace odd problem

    Tried that, but I apparently need the other field to be duplicated... can you choose which field it duplicates in the motion effect editor?

    MC 2018.11, High Sierra, Mac Pro (Late 2013) 3 GHz 8-core Xeon E5 64 GB ram, AMD D700 [view my complete system specs]

    "Doctor, it hurts when I do this..."

     

    MC 2018.11, High Sierra, Mac Pro (Late 2013) 3 GHz 8-core Xeon E5 64 GB ram, AMD D700

  • Fri, Apr 19 2019 9:13 PM In reply to

    • jef
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    Re: prog/interlace odd problem

    Not that I have found.

    I too have used the Sapphire plug for such issues.

    Jef

    Avid DS 11.0.2 R.I.P | MC "Well, it depends ..." mostly 8.12.9|OS 10.14.x - iMac Pro 2019 - home system MacPro Dual 2.8 8core GTX680 "Harpertown"... [view my complete system specs]

    _____________________________________________

    Jef Huey

    Senior Editor

    Old Stuff  http://vimeo.com/album/3037796

  • Fri, Apr 19 2019 9:15 PM In reply to

    • jef
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    Re: prog/interlace odd problem

    Just had a thought.  Might be a disaster.  You could try to first use the Field Invert effect (might not be the exact name and then the Duplicate Field motion effect.

    Jef

    Avid DS 11.0.2 R.I.P | MC "Well, it depends ..." mostly 8.12.9|OS 10.14.x - iMac Pro 2019 - home system MacPro Dual 2.8 8core GTX680 "Harpertown"... [view my complete system specs]

    _____________________________________________

    Jef Huey

    Senior Editor

    Old Stuff  http://vimeo.com/album/3037796

  • Sat, Apr 20 2019 3:11 PM In reply to

    • jmcbrg
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    Re: prog/interlace odd problem

    I'll give that a try on Monday, meanwhile, just to get going I set it up to render all with the Sapphire effects method. Thanks for helping wade through this.

    -Jeff C

    MC 2018.11, High Sierra, Mac Pro (Late 2013) 3 GHz 8-core Xeon E5 64 GB ram, AMD D700 [view my complete system specs]

    "Doctor, it hurts when I do this..."

     

    MC 2018.11, High Sierra, Mac Pro (Late 2013) 3 GHz 8-core Xeon E5 64 GB ram, AMD D700

  • Mon, Apr 22 2019 2:40 PM In reply to

    • Isaac T.
    • Top 150 Contributor
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    Re: prog/interlace odd problem

    @jmcbrg: mornin'!

    Read this whole thread. A couple ideas:

     

    1. Have you tried verifying field dominance using MediaInfo or MediaInfoOnline?

    https://mediaarea.net/MediaInfoOnline

    Look for the metadata labeled, "Scan type" and "Scan order".

    Once that's known...

     

    2. If you have Final Cut Pro X or Compressor installed, deinterlacing shots is a snap.

    https://support.apple.com/kb/PH12648?locale=en_US

    Do a Find on that support doc for "Deinterlace", and follow those 6 steps. Export the clip from FCP X to your project's target frame size and codec, import that file into Media Composer, and you're off.

    Mid-2010 Mac Pro • 2018 MacBook Pro [view my complete system specs]

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