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composite scaling degrades output

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composite scaling degrades output
by Matthew Beall on May 1, 2008 at 1:54:24 pm

We are creating several movies for DVD (720x480).. One of our movies' footage was captured at full D1 resolution (720x486).. When I bring the footage in and apply my treatments in a DV resolution composite, the rendered quicktime seems low resolution.. I wouldn't think just cropping 3 lines on the top and bottom would do this, but the quicktime is definitely degraded. I tested just bringing in the footage in a DV composite and rendering straight out with no effects applied, and the quality was still degraded..

What could be causing this?

-Matthew

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Re: composite scaling degrades output
by Jeff Brown on May 1, 2008 at 10:29:39 pm

Could it be the "feature" of QuickTime Player that defaults to NOT being set to "display high quality"? It's under Movie properties--> video track, I think.

-jeff

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Re: composite scaling degrades output
by warren BONES on May 6, 2008 at 2:21:02 am

It sounds strange if you are cropping, rather than scaling the image. Have you tried de-interlacing it maybe?

I'm a contractor for Autodesk at the moment but, unless otherwise stated, all opinions expressed here are my own.

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Re: composite scaling degrades output
by Matthew Beall on May 6, 2008 at 4:28:43 pm

Could it be the "feature" of QuickTime Player that defaults to NOT being set to "display high quality"? It's under Movie properties--> video track, I think.

Jeff,

Quicktime is set to high quality..


It sounds strange if you are cropping, rather than scaling the image. Have you tried de-interlacing it maybe?

I have tried de-interlacing, but the quality still suffers..

Perhaps this is an Avid codec issue?

-Matthew



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