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- Introducing Premiere Pro: the compositing program
- Understanding transparency and alpha channels
- Adjusting opacity
- Working with garbage mattes
- Luma keys and chroma keys
- The Ultra Keyer
- Nesting sequences
- Understanding and using blend modes
- Creating track mattes
Skill Level Intermediate
Welcome to this workshop on using Adobe Premiere Pro CS5.5 for compositing. Now it's quite likely that you have been, using Premiere Pro for a little while, as a cutter and it's an excellent editing system. But actually, Premiere Pro has got some pretty advanced features as well, for compositing, effects work, and audio. In this workshop, I'm going to introduce the key controls for you to be able to use Premiere Pro to achieve the same kind of compositing results, that you'd be looking to move into After Effects to achieve.
And After Effects is an amazing application and it has that dedicated detail designed interface, but Premier Pro actually also has some really advanced features. And you can achieve most of what you want to, just using the features inside your editor. Premier Pro includes the Ultra Keyer. And if I just show you on here. I've got an example of a piece of media that has been keyed.
Now keying just means replacing the alpha channel information, that's the transparency information, with something new. By default it's going to be fully on, and there are different ways for saying that each of the pixels should or should not be visible. Here the Ultra Keyer here is using a color selection, to tell the alpha channel which bits of the image should be visible. And so as a consequence I can get my media. Just turn off the audio here, to layer with a background. You can do this with color or you can do it with luminance.
In fact there is a whole bunch of different ways of doing it. Another feature of the Premiere Pro interface is that you can nest sequences. So if I have had several clips in a row here, that I want to apply a single set of effects to. I can just put that into another sequence, and I get the output of that with all of the cuts as a single item that I can work with. You might also want to use Premiere Pro to apply Garbage Mats, and if I just show you here, so we've got multiple types of Garbage Mat. Which simply allows you to specify a region of the image that you're going to crop out.
If I for example turn off the key on here so you can see the foreground. And then also turn off the Garbage Mat. You can see I just removed a part of this image, by using effectively an advanced Crop tool. A lot of the advanced compositing that you'll apply inside of Premier Pro, will be achieved by combining multiple effects in exactly this way. Put them all together and you've got a layered effect. Another thing you might want to do is create blend modes, and here I've got a simple title which has a blend mode applied to it.
So you can see that the colors are interacting with the background, in ways that wouldn't be possible if I were just applying this text as an overlay, I'll just show you here. You can see how a color inside of this text, it's actually doing something a little bit more complicated than simply appearing in front of the background. And this is achieved without me putting transparency into the letters. This is done using the Photoshop style blend modes available inside of Premiere Pro.
Another feature of the way that Premiere Pro works with transparency, is you can use the Interpret Footage command. This is under the Ctrl+click or Cmd+click option in Premiere Pro. To bring up the Contextual menu to go into the Interpret Footage controls. And if I go down, down, down inside this panel, you'll see there's an option to ignore the alpha panel or invert the alpha channel. And again, the alpha channel is what defines the visibility of each individual pixel.
Effectively, it's another channel like the red, green, and blue color information that defines the way the colors are displayed. All in all, Premier Pro represents a pretty powerful compositing application. And I hope you're going to enjoy traveling with me as we learn about some of these advanced features.
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