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HD screen artifacts from SD output
I have done some moves in Aftereffects on still photos — slow pantograph style zoom ins. I imported lossless AVI’s at 864×486 for Anamorphic DVD as my final destination, into FCP.
On the HD screen, for playback out of FCP, I am getting blurry double horizontal lines on the slow zoom ins, and more noise and moireing than I’d like to see on all my graphics. On the smaller computer screen, the image looks much cleaner, without the artifacts.
For example, there is a guy wearing glasses in a MCU still shot (zooming slowly), and his single rim glasses have pronounced double rims (a motion artifact?)on the HD screen. I wish I could get rid of the doubling, and it seems to happen most severely on this one shot. Some of the other stills have the guy with his black rimmed glasses, and I don’t see the doubling. IT’s as if those glasses rims at that particular size are at the exact resonant frequency of the lines of the HD monitor.
I am coming out of an Igniter RT card using the S video connector into my mitsubishi 46″ HD screen.
I don’t know if this is the right forum to ask this question, but is there anyway to reduce moireing, doubling, and blurriness on large screens from FCP? (I know the easy answer is — get an HD system.)
thx
~ John
“Life is good, as long as it doesn’t take up too much of my time.”
-anonymous gamer
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4 Replies
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Could the fields be inverted?
Best,
Jeff G
Apple Master Trainer | Avid Cert. Instructor DS/MC | Adobe Cert. Instructor
————
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Yeah, that had occurred to me, Jeff. I have looked about for where a field reversal may occur, but I can’t find anything out of place or out of the ordinary. I see no setting in my Mitsubishi HD TV for field reversal. The Mitsu must be functioning in interlace mode when there’s S video coming into it, I would imagine.
Ah, i see here that Aftereffects render settings is set to “field render off”. I think I will choose the “upper field first” option instead, try that see how it looks.
~ John
“Life is good, as long as it doesn’t take up too much of my time.”
-anonymous gamer
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All HD is either upper field or progressive. See what your FCP sequence settings are and match that.
Best,
Jeff G
Apple Master Trainer | Avid Cert. Instructor DS/MC | Adobe Cert. Instructor
————
You should follow me (filmgeek) on twitter. I promise to be nice.
Come See me speak at NAB!
Compressor Essentials from Lynda.com
(older but still good) Marquee, Media Composer (3.5) and Basic/Advanced Color DVDs (1.0) from Vasst.com
Contact me through my Website -
HI Dave ~
Oh no, you may be misunderstanding me, my FCP is SD. I do not have HD capability.
thx
~ John
“Life is good, as long as it doesn’t take up too much of my time.”
-anonymous gamer
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