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In this lesson, we're going to learn how to apply our two point tracking data.
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OK, so we've already gone ahead and gotten our track one and two finished.
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I challenged you in the last lesson to try to get
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your second track down on your own.
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If you didn't, though, you can just open up 06_begin in your project files,
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and I've gone ahead and finished this one up between lessons.
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So if you just select your track two here,
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and we scrub backwards,
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you can see that that sticks pretty well onto that R on the
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tattoo pretty much throughout the track.
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We get a little bit of rotation, a little bit of position move,
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but this is going to give us the data we need to get this tattoo covered up.
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So, what's next?
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I'm going to go ahead clear the properties,
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then,
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and what we want to do next is to make sure that our project size
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is the 1280x720 that we're working with here.
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Now, this is something you probably should do at the beginning,
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every time you read something in.
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But just in case you didn't, you don't have to do it before the tracker.
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But before we start adding some of these other nodes,
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it's very important that our composition is the same
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size as the read node we've dropped in.
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So just move over here to your Properties panel,
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hit the S key, and right where you see full size format,
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just drop that down, and we're going to choose the 1280x720.
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That's what are our read node was at.
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So that's great.
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You can go ahead and clear that properties bin again,
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and now we're ready to get started.
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So what I want to do is kind of come back over here to the first frame,
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which is going to be frame zero,
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and I want to draw a rotoscope around the tattoo.
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So this rotoscope is going to kind of outline the area,
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and it's going to give me a spot that I can just eventually make
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that rotoscope move along with my tracking data,
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so that we can use the rotoscope to kind of isolate this
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area and affect it to cover up the tattoo.
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So over here and a hover over your draw node,
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click, and we'll grab that roto there.
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And you don't even have to plug this roto into anything.
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In fact, I would recommend just kind of leaving it off there,
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and just making sure your viewer is plugged into your tracker.
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The roto doesn't have to be plugged into anything yet,
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because it'll end up being plugged in with an
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expression to the tracker later on.
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So, let's go ahead and we'll just grab the bezier from our roto node.
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And you might need to zoom out just a bit.
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I'm just middle clicking and dragging to move this around.
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And let's go ahead,
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and we'll just click kind of here on the edges of those words.
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And just right about there.
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That looks pretty good.
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OK.
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All right, so for the most part, I mean,
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that isn't, obviously, a perfect rotoscope,
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but it's going at the job done for what we need.
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And you can adjust it a little bit if you need to,
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but you really only need these four points.
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So the next thing I want to do is just blur the area inside of the rotoscope.
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Now, if you had a person that had a lot of freckles,
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a lot of really obvious detail,
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you might not be able to get away with just a blur,
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like what we're going to do.
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But she has pretty even skin, so I think this is going to work nicely.
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So let's just come over here to our filter button here.
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Just click, and we're going to grab the blur node.
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And again, I'm just middle clicking and dragging to pull this around.
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I'm gonna drop the blur node between my tracker and my viewer.
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So my blur is affecting my read node upstream,
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and then let's go ahead and we'll pull up that size of the blur.
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So just until you're happy with that tattoo being blurred out,
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we're really just looking at the area inside of the rotoscope we created.
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And now I want to use this rotoscope to make
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everything outside of the roto clear,
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because I really want that tattoo to be blurred.
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So all we have to do is grab the mask port of our blur
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node and drop it onto the rotonode.
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So now if I clear my properties bin so there's no line,
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we can kind of see what this looks like.
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And we can even refine this a little bit further if we want to.
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We can give it a little bit more blue, kind of feather the edges,
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and really make that look nice.
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But for now, it looks pretty good just as a still frame.
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If you never knew she had a tattoo,
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you probably wouldn't even notice this darker area.
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But we definitely can make this look even a little bit better.
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But let's just go ahead and play, and see what's happening now.
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So we've got the blur in place,
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and the rotoscope is doing its job as far as not having the whole image blurred.
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But I want the rotoscope to move along with the tattoo,
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so that gives us a good indication of where we need to place the node
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that's going to get that tracker data applied to it.
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And that's going to be a transform node.
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So simply select that roto node, and then it's going to place a tracker,
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or excuse me, place a transform node downstream of the roto node,
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just on this mask pipe, which is perfect.
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That's exactly where we want it.
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So just come over here to your Transform button,
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choose the transform node,
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and you can see that now basically what's happening with this node tree
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is we have a rotoscope that feeds into transform node.
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Once we've hooked the transform node up to the tracker,
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it's going to move that rotoscope around,
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and that therefore move the area that is visible with the blur.
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So let's come back over here to frame zero and start hooking up our data.
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So to hook this together, instead of using the link to,
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which is a little bit newer feature,
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I'm going to use the old tried and true method of just Control
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clicking and dragging data from one box to another.
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So go ahead and double click your tracker to open that up,
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and you want to go to the Transform tab of the tracker.
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And now you've got a translation, a rotation, and a scale.
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And that translation has basically been averaged between the two
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translations that we got from our two tracks,
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so that's going to give us a really good position data for that.
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And then we also have this center that has been tracked as well,
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which is very important for adding in here.
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So let's go ahead and link all four of these pieces of data,
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the translation, the rotation, the scale and the center to our transform node.
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So all I'm going to do is bring my mouse over here and hover
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over the Animation menu for my first property,
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the translate property.
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And I'm going to hold down the Control button,
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and then click that Animation menu and just drag down,
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and then hover over the property I want to link to,
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which is to translate on my transform node.
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And then I'll just release my mouse,
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and that's going to link those pieces together,
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and you can see a couple things happened.
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So now the numbers here match exactly what we have in
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the translation for tracker one, and now we also have this little green line,
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which is basically showing that there's an expression
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linking the tracker to the transform node.
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And that's not really a pipe that you can change.
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So when those are diagonal, you just kind of have to deal with it.
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You try to get straight pipes everywhere else, though.
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OK, so now let's go ahead and link up these other three properties.
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I'm just going to click, or, excuse me, hold the Control button,
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and then click the rotation property.
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Pull that onto the rotation property for the transform node.
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The same for the scale.
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Hold Control, click the Scale Animation menu,
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and drop that down onto the Scale Animation menu for transform.
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And then let's kind of scroll down here a little bit so we
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can see the center of our transform node.
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You can see those two values are different.
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Let's go ahead and control,
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and click and drag to the Animation menu of the center on our transform.
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OK, so now let's just clear that properties bin,
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and go ahead and watch this animate through.
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So I'm just hitting the Play button, and that stays with her pretty well.
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I mean, it's moving around really nicely.
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We've got some rotation, it's being covered up really well.
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But I think we could do a little bit better,
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just to kind of tweak what the mask,
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or what the rotoscope and the blur look like.
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So let's go ahead and open back up both of those
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properties over here in our bin,
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and just to right down here where we really get the tattoo looking pretty dark,
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I want to go ahead and maybe feather out my rotoscope a little bit.
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So just come over here to the roto, and let's pull open that feather property.
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Now, you see that if I do it too much,
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it's going to go all the way outside of her arm and
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start to blur this area here and here.
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So we don't want it feathered that much.
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Just going to do it just right about there.
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So it's going to be just kind of to the edges of her arm.
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And then let's go ahead and maybe bump the blur up a little bit higher, too.
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So now the blur is going to look just better on the inside.
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It's not going to be so dark.
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Let's kind of drag this back a little bit and see
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what it looks like at the beginning.
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I think that looks pretty good,
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but it looks like the feather is too much here at the beginning,
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so let's go ahead and pull that feather back even further.
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And if you want to, you know,
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we can't feather it too much more on this side because it
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gets so close to her wrist on the edge,
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but we can feather more on this side over here.
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So if you just click one of those anchor points a couple times,
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you're gonna get this little line that pops out.
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And you can just pull this, and that's going to feather just this one side.
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So I'll do this at the bottom as well.
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Just click and pull that out,
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and it's going to feather that just one side of the rotoscope.
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So we'll clear that properties bin, and that looks much better.
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Now, again, if you want the rotoscope to be more feathered,
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you're just going to have to be careful about where
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this anchor point here is landing.
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So obviously you want it outside of the tattoo,
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but to feather this very much at all is going to give you a
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little bit of spill over onto her shirt,
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which is not very desirable.
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So you've just got to balance that.
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And I think this looks pretty good here.
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If we look up here, we can choose the zoom level that we want.
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And if we just put that either at times 1 or divide by 1,
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it's going to be the same.
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This is what it's going to look like at full size,
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and honestly I think that looks pretty good,
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still.
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So if I just kind of do a middle click here to re-size that,
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we can watch that play through.
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And the data has been applied really nicely.
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I think the blur looks great, and it really moves very,
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very nicely with her arm.
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So, great job on that.
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Hopefully you were able to get your tracking data between lessons.
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Again, if not, you can just follow along with what we already had here,
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and just be able to apply the data in this lesson.
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So that's kind of just everything we went over here.
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And then you also learned how to cover up a tattoo using a rotoscope,
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so that was just kind of a bonus on learning how to
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apply that two point tracking data.
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Now,
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in our next lesson I want to show you another way
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to use two point tracking data, which is for image stabilization.
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So sometimes your subject might be moving, but you also have a shaky camera.
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So this shot was shot with a tripod,
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but sometimes you're going to shoot with a handheld.
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So whenever you do that,
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you're also going to be using a two point track to stabilize the image.
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Now, not every time.
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Sometimes you can use a one point,
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but most of the time you probably want a two point track,
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just because handheld is going to have rotation in it,
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so that just kind of makes sense.
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So we're going to learn how to do that in our next lesson,
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and that's going to be pretty similar to this one,
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but there's just a slightly different workflow.
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So if you want to know how to do that image stabilization,
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stick around for our next lesson.
20752
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