DivX Keying

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DivX Keying

Postby Hiro The Dragon King » Thu Feb 07, 2008 11:35 am

Is there a effect that allows you to key frames based on movement, like how DivX compression works? If it doesn't move it's keyed out in the next frame.
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Postby Athena » Thu Feb 07, 2008 12:15 pm

I'm not sure why you'd need to if editing lossless.

Can you explain what you're trying to do exactly?
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Postby Kariudo » Thu Feb 07, 2008 12:18 pm

I'm just taking a guess here...difference matte perhaps?
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Postby Hiro The Dragon King » Thu Feb 07, 2008 1:31 pm

Interframe would have been a better word than DivX...
A keying effect that does something <a href="http://www.animemusicvideos.org/guides/avtech/video3.htm">like this...</a>(scroll down to pictures...)

Kind of like difference matte but difference matte works on the assumption that you have the background image on it's own.
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Postby Athena » Thu Feb 07, 2008 2:21 pm

*blink* *blink*

I'm still unclear on the effect you actually need.
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Postby Purge » Thu Feb 07, 2008 9:44 pm

the person wants easy auto-rotoscoping based on frame by frame pixel difference
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Postby Hiro The Dragon King » Fri Feb 08, 2008 8:26 am

I don't really want it...I was just wondering if anybody has made one...

The effect would be the equivalent of using Difference Matte on each frame using the previous frame for the DM background...
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Postby Zarxrax » Fri Feb 08, 2008 8:30 am

Well I think you just answered your own question there didnt you? Difference matte.
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Postby Hiro The Dragon King » Mon Feb 11, 2008 7:31 am

Hiro The Dragon King wrote:The effect would be the equivalent of using Difference Matte on each frame using the previous frame for the DM background...

Zarxrax wrote:Well I think you just answered your own question there didnt you? Difference matte.]

No actually...I was looki....nevermind...
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Postby Hiro The Dragon King » Mon Feb 11, 2008 7:33 am

Stupid BBCode...Stupid lack of edit...

Correction...
Hiro The Dragon King wrote:The effect would be the equivalent of using Difference Matte on each frame using the previous frame for the DM background...

Zarxrax wrote:Well I think you just answered your own question there didnt you? Difference matte.


No actually...I was lookin...nevermind...
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Postby Dravonic » Sun Feb 17, 2008 8:18 am

I guess I know what you mean. You're probably trying to extract something from a image based on whether it moves or not... thats is actually a great idea specially on anime because in most anime studios they are too lazy, so they normaly do the scene the easiest way possible. That means that in a lot of scenes characters move but the background doesn't and with such an effect (the same one video codecs with inter-frame compression use) you would have a character cutout from a lot of frames (what would normaly take long tedios hours) in a few seconds.

The problem is I don't know any effects that does it so I won't be able to help xD

Hopefuly my explanation will help people understand better what you meant, since most of them got confused, and help you :p
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Postby Athena » Sun Feb 17, 2008 11:47 am

Uh, how about Color Key?
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Postby Dravonic » Sun Feb 17, 2008 2:51 pm

The problem with colour key is that you almost never will find a character in a keyable background. If you try to key the character out with the colour key you will end up removing parts of the character too.
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Postby Athena » Sun Feb 17, 2008 9:43 pm

Dravonic wrote:The problem with colour key is that you almost never will find a character in a keyable background. If you try to key the character out with the colour key you will end up removing parts of the character too.


Then you need to be more careful. My ACen project is full color keying. It just means you have to actually work to find appropriate clips with a background you can color key out.


Not that hard, really.
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