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Greenscreen/vertical position
I am doing a project in AE using green screen. I need to vertically reposition the footage of my actor
but when I do, the quality of my footage drops considerably. Artifacts appear and the edges seem to
blur. I am using DV footage. I am repositioning my footage approximately 21 pixels higher on the screen and it does not move once positioned. What am I doing wrong. The problem only shows up if I move the footage vertically.Thanks,
Bob -
8 Replies
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Is your y position a whole number or a does it contain decimals?
If so, try rounding off. -
With DV footage – and any interlaced footage – if you move the layer an odd number of pixels vertically, you will invert the field order. Assuming you’re in a DV comp, if you move it an even number of pixels and, as the other poster says, make sure it’s a round number, the interlacing of the footage will coincide with that of the comp and you shouldn’t have any problems.
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Thanks for all the input. Moving to footage an even number worked. I have been keying DV footage quite a bit the last couple of years and have gotten decent results with lots of tweaking. Lighting is the key. Thanks for the help.
Bob -
Another tip with interlaced footage is to de-interlace it, export it as something like quicktime animation preset, then reimport it and key that. I’ve had very good results doing it that way. There’s a decent workaround by Kramer for doing such things.. I’d link to it for ya but I’m at work >.>
Cheers
-Jeremy
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If you didn’t supply enough information I will start making assumptions. I’m usually wrong when I assume.
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True, I’d prefer progressive scan as well.. but these POS Quasar camcorders just don’t seem to have that feature 🙁 Hehe.. still trying to save up for a real camera, but these darn bills keep getting in the way.. Maybe someday, right?
-Jeremy
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If you didn’t supply enough information I will start making assumptions. I’m usually wrong when I assume.
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Thanks guys. I would love to shoot progressive as well. I guess Jeremy and I have the same problem… those darn bills. Thanks for all the input. Right now I will just have to stick with shooting DV and tweaking until I get it to work and dream of the day I can upgrade.
Thanks,
Bob Karsner -
HAHA NOPE!
I got me a pair of 1989 Quasar VHS Camcorders and a USB video capture card that can do 720 res 😀 I are poor 🙁
Heck I’m still using my roomie’s copy of CS3 while he’s off in the Airforce >.>
When I have a couple hundred $ saved up though, I’ll be getting some kind of HDV came (perhaps the one you mentioned).. want something that can do 1080 and not give me a heartattack when I try to bring it into AE.
-Jeremy
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If you didn’t supply enough information I will start making assumptions. I’m usually wrong when I assume.
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*grin* It’s the best I can do for now. But hoping to have some money shortly, any recommendations in the $500-750 range?
-Jeremy
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If you didn’t supply enough information I will start making assumptions. I’m usually wrong when I assume.
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