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Four Corner Pinning takes motion tracking up one level. Instead of tracking one point, it tracks four points. So to show you what I'm taking about, let's analyze this clip. Press Play in the canvas, so we have our shot of these runners, and what I would like to see happen is this text fade up on this wall as the footage kind of moves in. There is going to be a little bit of tracking that happens, and we are going to use the four corners of this logo and pin them up against the wall in proper proportion.
So in order to do that, let's choose the first frame I would like to start the track with. Let's move the playhead back to frame 155. [00:00:44.93 Select the text. Let's move it out of the way for the time being. I would like the left edge of this text to be right here in this dark area along the wall, and just map it and looking like it sitting directly on the wall. So I'll roughly place my text. Go up to Add Behavior > Motion Tracking > Match Move.
In the Inspector we need to change the type from Transformation to Four Corners. We also need to make sure Transform is set to Attach to Source, the other object Mimic Source will not distort the image. So we want this image to distort properly, choose Attach to Source. Now with the four track points, let's go ahead and position them along the wall and try and choose an area of high contrast. Now you notice this image is not distorting and that's because I forgot to do one thing.
Press F5 to open up the Project pane and select the text layer. In order for the Match Move behavior to function properly, you need to make sure in your text layer under Layout that the text is flattened. This way the computer can properly distort the image. Go back to the Behaviors tab and reselect Match Move in your Layers window. Let's close the Project pane, F5, and continue placing our points. Now as we place these points, you want to just keep a general eye on how this object is distorting, so we can kind of make it look like it actually is properly distorted into this wall.
So we are doing two things, we are trying to keep the points on in an area of high contrast while we are also trying to distort the image to make it look like it fits on the wall properly. And that's why they gave you the two different options under Transform for Mimic and Attach to Source, because you could do this distortion in an application like Photoshop on this one wall if you like, and then it will just keep moving the image flat undistorted throughout the track.
I think I'm almost there. Before I click Analyze, since I only want to analyze from this frame forward, let's trim the Match Move behavior. Press I on your keyboard, and let's open the Project pane one more time, F5, and select the text layer and trim that as well, I on the keyboard. Now with Match Move selected, go ahead and click Analyze. You notice the track points are moving right along, and it's keeping the word right next to the wall.
Now you might notice a little shake here and that's due to the compression of this video. We are actually working at ProRes Proxy, which is a pretty high compression rate. We are just doing that so we can keep the file small for these lessons. Go back to the Layers tab and deselect Match Move, and click Play from beginning, so we can look at the shot. I think that's a pretty good match move. The only thing I don't like is the fact the text is actually just popping on. So we have to do one last thing, and that's just add a fade in and fade out.
So stop playback, select the text, move your playhead right to the beginning of the text, Shift+I on your keyboard. Go up to Add Behavior > Basic Motion > Fade In/Fade Out. Now, since the layer has been trimmed, the behavior is trimmed at the proper length, move the playhead back to the beginning, deselect everything and let's look at our result. We get the thumbs up, because yes of course, our Four Corner Pin, Match Move behavior has worked really well.
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