Original subtitles

In this lesson, we're going to learn how to reuse key frame data with the viewer.

OK,

so what I already have set up here for you is a Read

node with this video of a bobble-head.

And what I want to talk to you about in this lesson is how

to create a rotoscope that has a lot of repetitive motion

and save yourself some time.

So if something is happening very similarly over and

over in the shot that you're rotoing,

you definitely want to reuse some of that key frame data and then

minorly adjust it to fit any kind of subtle changes that may

happen just to save yourself some time.

So let's go ahead and get started with this process.

So I'm going to open up the Roto node that we have down here.

And this Roto node basically has just been drawn on

top of the bobble-head's head here.

And you can see that frame one through seven have already been keyed.

So I just went ahead and saved us some time,

because you're probably getting the hang of how to draw rotoscope by this point.

So what I want to show you, though, is after frame seven,

you can see that it just kind of sticks with the

information it was left with on frame seven and the head

continues to move without any keys.

So all of this motion, however, is very similar.

You can see if I'm on frame eight and then I come back to frame one,

his head is in a very similar position.

And the same goes for if I'm on frame nine and we go to frame two.

His head-- not really looking at the roto shape-- just his head,

doesn't really move too much.

So we can reuse this shape very easily.

So I'm going to go ahead and show you how to get started with this.

So instead of copying from frame one to eight,

which is kind of where that cycle begins again on frame eight.

I'm going to show you from frame two to nine,

simply because there's a bigger change that you can see in the movement

of the rotoscope once that data has been applied.

So that's just for the purpose of the tutorial,

and if you're doing it on your own,

you probably would just want to start right after that first cycle.

So we'll go ahead, and come over here to frame two,

which is where the data exists that we want to copy.

So the first thing you want to do is, of course,

move to the frame you want a copy from.

Then we're going to come up here to our viewer, and select all of the points.

So just drag a box around your whole rotoscope-- everything you

want to move basically with this copy data.

And then you're just going to right click on top of this, and go down to Copy.

And you'll choose three curved spline key values.

So this is going to give you the value of all of

those little points or spline keys.

So go ahead and click that.

And now the data has been copied.

Then,

we'll come over here to frame nine because we know that

our frame two corresponds to frame nine.

And then we can right click again and just hit Paste

and go down to three curves values.

And you can see that now that roto shape snapped onto his head.

Now we can go through here and adjust it a little bit if we need to.

He might need a little more room on his chin.

I can just click over here to deselect and maybe just grab those

two points and pull them down just slightly,

like that.

But overall,

he's very much in the same position that he was in that second frame.

So let's go ahead and do this for our other frames as well.

Now this is one of the drawbacks to this method.

You have to do it frame by frame.

So we'll start here on frame one.

Select all of our data, right click, go to Copy spline key values,

go over to our eight frame, right click and hit Paste three curve values.

And then that's going to pop that back into place.

And this one is a little bit more off than the first one,

so we can kind of just move that down.

But it's a lot better than trying to go in and redraw the shape from scratch.

So you're going to have a lot better luck and also better

point consistency by doing it in this way,

because the more you change it over time,

the more it's going to kind of differ from what that

our original shape was that you drew.

Cell this is definitely going to help,

just by referencing that our original data.

Then we'll go to-- let's see, frame three.

And I'll go ahead and just select all my points.

And you want to make sure that what you have over here is everything.

So you see the ears haven't been selected.

So I'm going to just shift to add those to the selection.

Now those points are visible.

Just draw that around there just to make sure you got everything.

Then right click, go to Copy, spline key values,

go to your next frame to copy to, right click,

and hit Paste.

And you can see that that just snaps into place.

So now that we've done this a couple of times,

I want to challenge you, in between lessons,

to finish up this animation.

Now I started on frame one and went to frame eight.

So you can just remember that frame eight is the repeating frame,

and then from there on, you would just basically continue repeating.

Now I wouldn't necessarily say that by the time this cycle is in the

third repetition to keep going back to frame one,

because he's going to slow down over time.

You can see he's already starting to slow down just a little bit.

But it's a lot easier again just to adjust these key frames,

rather than trying to come in here and draw it from scratch.

So in this lesson,

we learned how to copy and paste key frame data using our viewer,

and in our next lesson we're going to learn the

last step of drawing a rotoscope,

which is going to be animating a complex rotoscoping mask really easily.

So we've kind of gone through this, learned how to draw different things,

learned how to re-use data,

and now we're ready to start bringing this together to create a final

piece that really shows off the power of rotoscoping.

So stick around and we're going to learn how to do that in our next lesson.