Instructor: Now you know to remove green screen,
but let's learn how to properly add a background.
First, let's deal with the dog,
adding a realistic background
and making it look realistic.
First, we're going to put the green screen dog on track two,
then let's find this park movie video,
and put it right behind, on layer one.
I'm gonna zoom in here.
This park video is not going to match the entire length
of the dog video,
so we can just trim off this last part
of the dog video
using the Razor Blade tool and deleting.
Right away we can say that this doesn't look quite natural.
For me, the background video does not match
the size of the dog
because I'm using the full resolution park.mov file,
which is 1920x1080,
where as the green screen dog video is only 1280x720.
Its going to be different for you
because I compressed them for the course,
but note that a quick way to resize any footage
to match the size of the sequence
is by right-clicking,
saying scale to frame size.
If I turn off the dog and I do that again,
you'll see that it automatically fits the screen size.
So, right-click, scale to frame size.
Now, we can adjust our dog.
The dog looks too big for this background,
so we can select our dog, double-click him
in our programme monitor,
then we can just resize.
Let's try to make it look like this dog
is the right size,
and we can put him somewhere that makes sense.
So, let's just put him in the bottom left corner.
So, still looks pretty big,
but that looks more, or less, normal.
The next thing we want to do is match
the colour temperature and the colour correction
of the background to our dog.
Our dog looks a little bit green.
So, we can go into the Effects controls,
and under the Ultra Key Effect,
there actually is some colour correction options.
You can even colour correct this in Lumetri Colour,
if you want,
but might as well just use the simple options
in the Ultra Key,
if they work.
The hue, if we drag this to the right,
will turn it more green, and then blue.
Then if we go to the left its going to get more orange,
reddish orange, and then purple.
So, we don't want to go too far with it,
but we can just go just a little bit.
Maybe negative eight, or so.
And Luminous, this is going to be the brightness,
but also the contrast.
We can decrease just a little bit to match
the lighting in the background.
This already looks a little bit better.
One thing that's going on in the background, though,
that's not happening with our green screen dog is
all these subjects, or objects,
the trees, the light post,
they create shadows in this environment,
So, let's go ahead and add a shadow to our dog.
In the Effects, search for Shadow,
and you'll find Drop Shadow.
Let's take that onto our green screen dog.
Then go down the Drop Shadow options,
and if we increase the distance,
you can see where the shadow is.
We're going to make it relatively far away,
so we can see it on the grass.
You play with the direction, just a little bit.
Something, like so.
And, maybe soften it up just a bit.
It's not a hard shadow.
You can also play with the opacity,
if you want it to be a little bit darker, to stand out.
You decrease the distance,
just a little bit,
and the direction, make it closer to the dog,
something like that.
Now, it looks more like our dog
is a part of the environment,
and when our dog moves, the shadow moves,
and it actually looks like its a shadow
on this grass, right here.
So, that looks pretty good.
So, the key things to do with adding a background
are to make sure that the size of you subject
and the background matches.
Then make sure that the colour correction
and colour temperature match.
Then lastly, add a shadow to make your subject
feel as if they're a part of the background.
If you're not using a realistic background,
or you don't care about it looking like its matching,
that's okay, too.
We have this light curtains horizontal clip,
which is just a background that I created in After Effects,
And, this is something that you can use for any project,
any green screen project.
And, if I put this underneath me,
you can see that its abstract, but its kinda cool.
Adding a drop shadow, actually will help this video too,
so I'm gonna do that, add a Drop Shadow,
and make it a little bit bigger.
So, distance, a little bit bigger,
and the softness.
I don't like the hard edge shadows, that much.
I like a bit more distance, but making it soft.
And, that just looks like it was
kind of like an actual background,
and that my shadow is casting on it.
Now that we've edit out the green screen,
we can actually increase the size of this video,
just a little bit or even move it around,
if we want to, say move me right here while I'm talking.
And, then we can have titles pop-up here
since this is one of my course videos,
or add other graphics or anything like that.
Cool, so that's a bit about
adding backgrounds to your videos.
If you have any questions, let me know.
Otherwise, we'll see you another lesson.