After a long pause, I will try to return to the blog. And today we will learn how to attach a picture or text to a specific point in the video.
So we need:
1. Adobe After Effects CS6 (I work in it)
2. Null object
3. Tracker – a built-in function of Adobe After Effects CS6 (it will come in handy, in Russian AE it is “Inspector” – thanks to Victor for the help, who added to my record)
So, the list is prepared. It’s time to look at all this a little more.
As screenshots for text, I will use a composition that will not take much time and will consist of a large dot moving around the screen. The composition consists of a layer (white) and a circle, the movement of which is given by two key points:
Why? Actually, the Zero layer is a layer that does not manifest itself in the composition in any way, but – when certain properties are applied to it, this layer will be able to control other layers. A bit confusing, but a little later, I think, you will figure it all out.
And … op-pa … The tracker generally does not understand what to track, and how – after all, he works with the finished composition, not layers! The solution is obvious: create a second composition that will use the first as a movie.
Approximately all of this can be described in the following words:
Track camera – track camera movement
Warp stabilizer – smooth out fluctuations
Stabilize motion – stabilize motion
And the possibilities of checkboxes:
Position – track movement
Rotation – track rotation
Scale – track scaling
We will consider the rest a bit later 🙂
Let me remind you, we need to track the movement. Click on: track motion, and check the Position + Rotation checkboxes. Immediately after that, two windows appeared in the composition field (highlighted in red on the screen):
Each of the windows is aimed at highlighting the area that needs to be tracked. Due to the fact that we will use our tracking to the zero object, it is possible to track not exactly the point we need, but something close. In my case, these will be the borders of the circle (see screen a little higher)
where each of the squares is a key point. We apply the analysis by clicking the Apply button in the Tracker window.
Then everything is quite simple – using the zero layer (let me remind you, this layer already knows how it needs to move) we attach the text to it. Add a text layer:
Layer – New – Text
thus, the text is clearly attached to the null object. Actually … that’s all 🙂
You can see the finished example below (a beer mug is hidden behind the emoticon):
And of course, in case of questions – write to the mail: firstname.lastname@example.org