Extracting with the RotoBrush tool

Now that we have the shot in After Effects, we can go ahead and split this into two pieces.…To do that, we're going to need two layers.…Here is how it works.…I will go ahead and select the layer and choose Edit > Duplicate, and that gives me a second copy.…I now want to go ahead and remove the subject from the background.…So let's go ahead and turn off the background layer. And in fact, we…should rename these.…Auto select the layer and press Enter or Return and I will call this…Background and the one on top Foreground, just to make it clear when I'm…working in the Timeline.…

I can now double-click on the layer to open it up. And up top, you'll notice…the Roto Brush tool.…This allows you to define the subject.…What you want to do is go ahead and drag down the middle of your subject, and it…will attempt to pick up the area.…If you need to add to that selection, you can go ahead and drag over other areas…and pick those up as well.…In this case I am going to add the picnic table because that's part of the…