Help with basic green screening

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Help with basic green screening

Hi there. I'm trying to use an intro for my videos in iMovie 11, and I want it to start out with a logo, and then have the logo "open up" to revel an oval of the video before the oval expands and the viewer sees the whole video.

To do this I made the intro video and it has a green oval where I want the video to show up, and I figured I'd just use the green screen feature. So I have a blank black still image over the first part of the intro, and then the intro overlaps into another clip where the actual main video starts.The problem is that right when it transitions over to the main video, it gets all messed up.

I have some images to help explain:

What it looks like before it "opens" and before the playhead gets to the main video:

http://imageshack.us/a/img405/9379/qvr4.png

What it looks like when the playhead gets to the main video (but it's still actually a black screen):

http://imageshack.us/a/img19/6931/2of4.png

What it looks like after the logo "opens":

http://img221.imageshack.us/img221/7744/tpz.png

I've messed around incessantly with the "white point" but it never makes it looks right. Possibly because I don't really know what "white point" means.

Any suggestions or thoughts would be very welcome. I really want to figure this out...

Thanks for reading!!!

MacBook Pro, OS X Mountain Lion (10.8.2), 2012 non-retina 15"

Posted on Jul 7, 2013 2:57 AM

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Answer 1

Jul 7, 2013 2:10 PM in response to SoulRed12

I would suggest using something other than green screen for this. Green screen is useful for shooting some video against a green screen in the foreground, which you then superimpose over a different background. Like a weatherman standing in front of a green screen doing the weather, and behind him are superimposed maps and graphics.

In your case, I would suggest that you use the Cutaway feature. You will find it in the same place as the green screen feature. When you drag the clip over the background clip, a poup menu will appear and you can choose cutaway.

In your photoshop (or similar) app, create your PNG file so that it has a blank oval (not a green one), in essence an empty oval with no background. Drag this and drop it on top of the background video. and choose cutaway. You can adjust the opacity of the foreground in the clip inspector.

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