Moire problem with Pan/Zoom Slideshow

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Level 1

125 points

Moire problem with Pan/Zoom Slideshow

OK, I have a wedding slideshow project with a pan/zoom effect on the images(slides).
Problem is I'm getting a rapid, moving moire type effect on a lot of the images, especially on angled lines & with eyeglasses frames.
I don't have a clue how to remedy this.
It's not noticeable in Motion. It's a little more noticeable after I render in standard NTSC DV & play back in Quicktime.
After I bring it into DVD Studio Pro for final output to DVD, it is almost unusable.
Any suggestions??

G5 DUAL 2.0 GHZ PPC/ G4 MD DUAL 1.25 GHZ / G4 CUBE 450 MHZ / iBOOK 12" G4 1 GHZ, Mac OS X (10.5.6), Plenty of RAM / Airport Card(iBook) / Linksys WRT54G WiFi Router

Posted on Nov 15, 2009 6:00 PM

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Answer 1

Nov 15, 2009 6:52 PM in response to JRM

probably a scaling issue - are you starting with very large stills and scaling them down in Motion? If so, scale them first in another app like Preview. Also, adding a small amount of gaussian blur can help.

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Answer 2

Andy Neil

Level 4

3,795 points

Nov 16, 2009 10:46 AM in response to JRM

Also, avoid DV/NTSC as a codec when dealing with pics. DV is a horrible codec for graphics, titles and hi-res pics.

If your pics are a separate element, use the highest quality codec you can before exporting to DVD.

Andy

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Answer 3

JRM Author

Level 1

125 points

Nov 16, 2009 8:12 PM in response to Mark Spencer4

Thanks for the response Mark,

The effect is pan & zoom so yes, there is scaling in Motion. Up & down depending on the slide.
It never goes over the 100%/full size though.
Should I move the camera instead of the image?
It actually seems more of a problem in DVD Studio Pro.
The quality is acceptable in Motion & then I export Lossless for better quality. A separate issue is when I render in "Best", I'm getting a final product with horizontal noise lines in the background. Still working on that so I'm using Standard.
The QT movie looks OK.
Then when I build a DVD in DVD Studio pro, final product is having the Moire effect.

I can't believe there isn't a work around for this.
Any more thoughts?

Also, if you have some input on the horizontal background noise I'm getting when rendering in "BEST", here's a link to a screen shot of what I'm talking about.
http://photropics.com/noise.jpg

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Answer 4

JRM Author

Level 1

125 points

Nov 16, 2009 8:18 PM in response to Andy Neil

Andy, Thanks for the response.
Could you read the reply I posted to Mark in this thread & let me know what you think?
I've exported using Lossless & that seems to be OK but still getting the Moire when I build in DVD Studio Pro.
Is there another way you recommend?
Thanks.
JRM

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Answer 5

Andy Neil

Level 4

3,795 points

Nov 16, 2009 8:44 PM in response to JRM

How large are your stills? If they are too large then you'll not be able to avoid moire depending on how thin and sharp the lines are.

I'd say if your stills are more than 200% larger than your frame size, then you should try sizing them down.

Also, pics with difficult subjects (ie: subjects more likely to moire) can be softened with a very slight gaussian blur of .3 or .4.

Andy

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