Guys and welcome to this new lecture and this lecture we are going to go profession actually within
after affects what you are going to learn is like just beginners or intermediate skills.
It is not so hard to create this.
But the applications are really professional.
Any professional video editor will want this work from you.
And of course you can use it on top of all your videos.
We are going to create video Matt.
That's what I call them video Matt is when we create a composition and we will use masks to create certain
areas that are transparent and animated.
We take this composition and make it a video and then we use this video on top of all other videos to
create a mat.
If it is within after effects or in any non linear video program non-linear means that we can have layers
on top of each other and they affect each other when they are on top.
Nonlinear meaning there are next to each other and really players don't interact at all.
Let's create a new composition and we call it video months.
Now the size here will play a big role.
You are going to map videos that the size can vary from a tiny resolution of four 80 to 40.
So it will be very good to create the highest resolution possible in After Effects.
If you are using CC 2017 go for USD for k and then you are sure that your Mott's will cover any video
and then we will make it five seconds.
Of course you can make it longer or shorter depending on your needs but actually it is not very important
as long as your mission is within the five seconds then the video that can stretch your video or make
it shorter or cut it in pieces do whatever he wants with the mats.
I would like.
Ok here is that I already toggle the transparency on because I want to see what's transparent and what's
not.
I would come now and create a solid layer to start creating the masks take a solid layer and give it
a different color less color a bit darker.
For now to see exactly what's happening with us later on you will have to change its color.
I would click and create the first mask I move it to the outside it seems.
Not outside in the middle something like this.
And you can always change this.
Then duplicate that mask by pressing control and selecting the second mask and moving it lets give it
some space in between.
I will do the same on other controls the move this one over here.
Another control the.
And also move it over here.
I'm trying to have the same spacing in between Musk's another control the movie ops is too big no problem.
So I select all the masks and click on the mask on the border of the mask.
Now that became one entity that I can fully transform for example doing them here and make them a bit
bigger maybe and position them any way we want.
That would be no problem for later on.
Unfortunately I cannot use a line or press enter to confirm it.
Now I want to animate the masks but there is a big problem.
Look at your mask is exactly your mask are transparent from the outside and nontransparent from the
inside.
So actually they are not actually as much as they are acting as cover up.
I need to change that.
I take the first mask and make it inverted.
It inverted everything else.
Now the first mask has a transparent background meaning I can see through when I put it on top of the
other video.
The second mask here I cannot invert because it will invert.
So the first mask.
I would go out and use substract.
And here I am using substract for all of them not as there is now.
The result is we have exactly created a map that can work anywhere.
You have transparency inside the masks and non-transparency outside the mask.
And this is exactly what you want to use.
Now we need to animate this.
Of course you can use it as it is but is not very interesting.
I would click on the leg press and click on the first layer press control is select all the mask path
and go to one second keyframe or the mouse pop come back to the beginning.
Now one by one I'm gonna meet them take the first mask the first mask but click on the border and take
it up for example take the second mask.
Click on the border for example at the bottom one and take it down.
OK the third mask now and click and take it up OK.
That's called Force mask.
Same.
Take it down.
Be patient with me and the last Moskow so we click and take it up.
So actually we have a very simple animation here.
If you are not press spacebar call and your not is the transparency I can see then what I'm looking
at is the transparency.
And that is very important.
Now let's open here.
Select or are keyframes.
Give them easy is come the graph and do something nice here.
Stop the animation.
Select all of them and let's move them to two second a shift to stay on the line.
Click on the handle and move it to the side.
I like this kind of alleviations call now it will do well.
I think you are in the Senate.
Here you are.
They come very nicely.
So we have created now video.
It's actually a pre-camp that has a background and has transparency.
How do we use this.
Let's go to our ad clip and create a new copy.
This is our ad lib that is the movie inside.
I will dig our video Amadis.
This is now a composition.
I would drop it on top.
I'm not sure what's happening.
It will cover everything.
Yes that's true but there is transparency and this is what we are going to see.
Now let me play it.
A press preview and that is what's happening.
The transparency is working very fine but of course our layer is very big.
Let's right click on it and say transform and fit to come up.
And now you have something very different and it's very beautiful.
Good.
Now usually we are not going to use this great background like this.
It is not really nice or lets you have a specific request or you start adding effects on the solid layer
like a ramp up or gradients or stories like this or give it that actually if you'd like but usually
a single card like this will not work.
People don't like it so I will DoubleClick again on the video maties over here.
I will come to the solid layer go to layer solid setting and make it the black This is of course for
the course.
And here you are now you have a pretty professional mask that you can use on top of any video.
And this is very powerful.
And the next lecture what you are going to do is render this video might make it a video or a movie.
In fact if we start video and use it and see exactly how it will affect the lives that I see you in
the next lecture.