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Superimposing video on top of a webpage

Posted on 2009-04-22
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Last Modified: 2012-05-06
Hello,

Can anyone tell me how to create video that seems to be superimposed on a website, similar to the following:

http://www.losangeles-duiattorney.com/

Looking at the source code, it looks like it might be "transparent" flash? Is this something that a client can take with their camcorder, then how do you convert it to flash?

Thanks!!

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Question by:anniengodis
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ariestav earned 2000 total points
ID: 24211613
You have to shoot the video with your subject (actors) in front of a greenscreen.  Then you bring this video footage into a post-processing application that allows you to key out the green background.  This can be done with Adobe AfterEffects, and other software that allows you to key, but AfterEffects is preferable.  When you key out the background, you will create what is called an alpha channel in the video.  This information is essentially a black and white representation of what parts of the video are to be masked out..  Once you finish keying (usually with the KeyLight effect in the Effects menu in AfterEffects), you can export the video from AfterEffects to .FLV and there is an option to save the alpha information.  You then import that file into your Flash IDE and you use it as the src parameter for an FLVPlayback component from the component library.

Then you can export the Flash move to a .swf that can be embedded into a div that can be placed anywhere on the page.  You will then be able to see the content of the webpage show through the masked areas (or keyed areas) of the video.
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by:anniengodis
ID: 24220261
Thanks ariestav! Very detailed instructions.  Unfortunately I have CS3 Web Premium, which doesn't have After Effects.

Holy Cow I just checked out purchasing After Effects and it's $999! Do you know the next best thing?
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by:ariestav
ID: 24220928
Premiere has a basic keyer that should be able to handle it.  To make your life easier, you really do need an Adobe video application (i.e. AE or Premiere).  I am sure there are third-party video apps that can convert to FLV format and maintain the alpha information, but I don't know of any off the top of my head. . .
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