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Rigging replacement animation in After Effects

From: 2D Character Animation

Video: Rigging replacement animation in After Effects

Once you have the basic hierarchy set up in your After Effects character, you can set up replacement animation. Now, how this is done is by just swapping out the individual mouths that we have. In fact, if I go back to the original Photoshop file, you can see them all laid out. I have all of these individual mouths. What I need to do is be able to swap those in and out to create the illusion of his mouth moving. In other words, we're going to replace this mouth with one of these other ones.

Rigging replacement animation in After Effects

Once you have the basic hierarchy set up in your After Effects character, you can set up replacement animation. Now, how this is done is by just swapping out the individual mouths that we have. In fact, if I go back to the original Photoshop file, you can see them all laid out. I have all of these individual mouths. What I need to do is be able to swap those in and out to create the illusion of his mouth moving. In other words, we're going to replace this mouth with one of these other ones.

We can automate that to some degree in After Effects. So let me show you how this is done. When I brought in that Photoshop file, you'll notice that we have all of them still in these layers here. So, for example, I've everything that starts with Snout, Snout_Closed, Snout_cons (consonant), Snout_E, Snout_F, Snout_M, all of the different consonants and phonemes that the character will need to speak. Now I need to bring these together into a composition and then I can bring them back into my main character.

So what I've done is I've created a basic composition here, and actually it's blank right now but it's just big enough to hold all of those mouth objects that I have. In fact, I can just take all of them and highlight them, just Shift+Select them and drag them into my Timeline here. Once I have them here I need to make sure that my composition is big enough to hold all of these. Now, I have nine mouths, 1 through9, and I have ten frames.

So that is exactly enough. So the next step is to just animate these so they animate one per frame. So I'm going to go ahead and select all of these layers here, and then I'm going to slide them down so that they're only one to frame long. Then I'm going to go to Animation > Keyframe Assistant > Sequence Layers. When I hit OK, you'll see what happens. It will sequence these layers one per frame, pretty simple.

So I have my animation pretty much in place. But I actually want this to start with the closed mouth. So I'm actually going to go ahead and move this layer up and then just go ahead and swap those, so it starts with this Closed layer. So what you'll notice is that as this moves, that nose is kind of bouncing around little bit. You can see how it moves up and down. So I need to align these to my master frame, which is going to be my closed mouth. So I'm going to go ahead and just slide that layer so that it's all the way across the timeline. You can see how this is all moving against it.

So all I have to do is go one at a time and just select these and then just move them so that that nose lines up. So just go a frame at a time and select the underlying layer, make sure that nose is pretty much registered with that first mouth. Really it's just not going to take all that long.

We've got one more here. Now once I have them aligned, I'm just going to go ahead and slide this one back on the top so that it's back to being one frame and then we'll just do a quick test. You can see how it's pretty much aligned. It's bouncing a little bit, we can tweak this, but for our purposes, it's good enough. So now I have a composition that animates over ten frames, all of them mouths with a blank at the end. So now I'm going to go to my main composition here, I'm going to go to Bear, and I'm going to take this mouth and I'm going to keep it there for just a second while I line up the new mouth here, which is this composition.

I'm going to drag this in and drag it over the original mouth to make sure that I've aligned it. Then I'm just going to go ahead and take this one and I can either turn it off or delete it. I'm just going to go ahead and turn this one off. So now I have the mouths. You can see they're all animating, which is great. The next thing I need to do is be able to control that animation so I can actually do lip sync or something like that. So I'm going to keep this layer selected, then I'm just going to go to Layer > Time and just do Enable Time Remapping.

Now, what this does is it actually sets up a situation where I can actually type in the frame number. And this frame number corresponds to the frame number in this little animation. So when I hit 6, it brings up frame 6, which is in this case the Oh mouth. So if I delete this final keyframe here and just stretch this out, you can see now all I have to do is just type in the number or even use it as a slider and you can just animate whatever mouth you want.

This is a great way to set up this sort of animation. And again, I still need to link this to the head. Now you can use this for mouths, but you can also use it for a lot of other things. In fact, I have a final file that we can open here. I'm just going to go ahead and Open Project, and we're going to open this file called Bear_Rigged. That has pretty much everything set up. So I've got the Mouths set up on this Time Remap, just like we had before, but I also have things like eyelids, so we can actually blink his eyes.

I also have hands. So if you scroll down, for example, to the right hand, you can see how I can time remap his hands so that he can actually make different hand positions. And again, this works for a lot of different things. So keep this in mind as you set up your characters to get them ready to animate.

Show transcript

This video is part of

Image for 2D Character Animation
2D Character Animation

73 video lessons · 22754 viewers

George Maestri
Author

 
Expand all | Collapse all
  1. 2m 18s
    1. Introduction
      1m 2s
    2. Using the exercise files
      1m 16s
  2. 48m 21s
    1. Designing characters
      3m 22s
    2. Tracing characters
      4m 32s
    3. Creating joints that work
      3m 53s
    4. Working with outlines
      4m 0s
    5. Accessorizing your characters
      2m 21s
    6. Creating parts for replacement animation
      1m 41s
    7. Rigging hierarchies in After Effects
      5m 33s
    8. Rigging replacement animation in After Effects
      5m 52s
    9. Rigging with the Puppet tool in After Effects
      3m 16s
    10. Rigging Flash characters
      5m 50s
    11. Rigging replacement animation in Flash
      4m 25s
    12. Rigging with the Bone tool in Flash
      3m 36s
  3. 55m 29s
    1. The first law of motion
      3m 3s
    2. The second law of motion
      3m 45s
    3. The third law of motion
      3m 19s
    4. Using slow in and slow out
      5m 34s
    5. Arcs and smooth motion
      5m 4s
    6. Understanding overlap and follow-through
      5m 16s
    7. Animating overlap and follow-through
      5m 46s
    8. Understanding squash and stretch
      3m 10s
    9. Animating squash and stretch
      4m 40s
    10. Squashing and stretching characters
      5m 16s
    11. Understanding weight
      3m 27s
    12. Understanding anticipation
      4m 54s
    13. Animating anticipation and weight
      2m 15s
  4. 45m 50s
    1. Internal vs. external forces
      4m 45s
    2. Bringing characters to life
      4m 57s
    3. Animating blinks
      4m 37s
    4. Animating changes in eye direction
      2m 43s
    5. Animating head turns
      8m 1s
    6. Creating a strong line of action
      4m 16s
    7. Creating strong silhouettes
      2m 19s
    8. Pose-to-pose animation: Blocking
      4m 32s
    9. Pose-to-pose animation: Animating
      4m 21s
    10. Pose-to-pose animation: Finalizing
      5m 19s
  5. 46m 53s
    1. A walk in four poses
      2m 27s
    2. Motion of the head and body
      1m 32s
    3. Walk cycles and backgrounds
      1m 40s
    4. Skeleton motion and walking
      4m 2s
    5. Animating a walk: Contact position
      3m 0s
    6. Animating a walk: The feet
      9m 10s
    7. Animating a walk: The body
      5m 19s
    8. Animating a walk: The legs
      8m 21s
    9. Animating a walk: The upper body and arms
      3m 46s
    10. Animating a walk: The head
      2m 50s
    11. Animating a walk: Squash and stretch
      4m 46s
  6. 26m 52s
    1. A run in four poses
      4m 10s
    2. Animating a run: First pose
      4m 39s
    3. Animating a run: Second pose
      3m 45s
    4. Animating a run: Third pose
      3m 27s
    5. Animating a run: Fourth pose
      5m 1s
    6. Animating a run: Upper body
      5m 50s
  7. 37m 6s
    1. The basics of dialogue animation
      4m 35s
    2. Reading tracks and assigning mouth shapes
      5m 33s
    3. Phonemes and lip-syncing
      8m 36s
    4. Animating dialogue: Animating the body
      6m 27s
    5. Animating dialogue: Assigning mouth shapes
      4m 10s
    6. Animating dialogue: Finalizing
      7m 45s
  8. 1h 27m
    1. Animating a scene
      2m 0s
    2. Setting up the scene in After Effects
      3m 2s
    3. Animating the feet in After Effects
      10m 40s
    4. Animating the legs in After Effects
      4m 21s
    5. Animating the upper body in After Effects
      9m 44s
    6. Animating the mouth and blinks in After Effects
      7m 5s
    7. Setting up the scene in Flash
      4m 6s
    8. Animating the feet in Flash
      9m 0s
    9. Animating the body in Flash
      5m 23s
    10. Animating the legs in Flash
      7m 24s
    11. Animating the hands in Flash
      11m 54s
    12. Animating the mouth in Flash
      12m 26s
  9. 33s
    1. Goodbye
      33s

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