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What is a keyframe?

From: Flash CS3 Professional Essential Training

Video: What is a keyframe?

This brief video sets out to answer the question, "what is a keyframe?" I've segmented this out into a small video, just because of its importance, not only as a precursor for the rest of the chapter, but also to virtually all of the animation techniques that you'll learn. To help bring focus to this question, I'm going to skip ahead a bit, but if anything seems out of context don't worry. Everything introduced in this video will be reviewed shortly. Again, what is a keyframe? In a nutshell, a keyframe is one way of representing author defined information in an animation. For example, let's consider the file in front of us. We have an empty stage and, an empty timeline. So far, I, the file's author, have not to defined any new information, but I'm going to come down to my library, and choose this movie clip, and drag it onto the stage. Note that the timeline has been populated by content, and if I click to deselect the movie clip, you'll see that this frame is represented by a dark, black circle. That indicates a keyframe. If I add frames by going out to the number of frames that I want to add, and then say Insert > Timeline > Frame, I'll again click to deselect the movie clip, and you'll note that, that black circle only appears in frame 1. The remainder of the frames are unaffected until the last frame, where a vertical rectangle is simply indicating the end of the frame span.

What is a keyframe?

This brief video sets out to answer the question, "what is a keyframe?" I've segmented this out into a small video, just because of its importance, not only as a precursor for the rest of the chapter, but also to virtually all of the animation techniques that you'll learn. To help bring focus to this question, I'm going to skip ahead a bit, but if anything seems out of context don't worry. Everything introduced in this video will be reviewed shortly. Again, what is a keyframe? In a nutshell, a keyframe is one way of representing author defined information in an animation. For example, let's consider the file in front of us. We have an empty stage and, an empty timeline. So far, I, the file's author, have not to defined any new information, but I'm going to come down to my library, and choose this movie clip, and drag it onto the stage. Note that the timeline has been populated by content, and if I click to deselect the movie clip, you'll see that this frame is represented by a dark, black circle. That indicates a keyframe. If I add frames by going out to the number of frames that I want to add, and then say Insert > Timeline > Frame, I'll again click to deselect the movie clip, and you'll note that, that black circle only appears in frame 1. The remainder of the frames are unaffected until the last frame, where a vertical rectangle is simply indicating the end of the frame span.

Why then is there only one keyframe? Well, what new information have I, the author defined? Well, I've clearly defined the position of this movie clip on the stage so, its X/Y coordinate is now new information. When I click the movie clip to select it, you'll see that the entire frame span is selected. Not just the first frame, or not just the frame in which the playback head resides. Furthermore, while the playback head happens to be in frame 10 right now, if I move this circle across the stage, and look at any other frame, you'll see that the circle resides in a new location in all 10 frames. Again, this is because there's only one keyframe, as I've only introduced one bit of author defined information. Okay, so, let's talk about putting another keyframe in. Let's move our circle back to the left side of the screen, and let's go to frame 10, and select only that frame in the timeline, and then say Insert > Timeline > Keyframe. I now have another black circle. In adding that keyframe I've started the process of adding new author defined information to the animation. I'm going to move circle to the other side of the stage, and now I have a keyframe with a circle here, and then I have span of frames from 1-9, just as I had before adding the second keyframe, and in that span, the circle is always on the left side of the screen. Now, I have two bits of author defined information, an X/Y coordinate in frame 1, and another X/Y coordinate in frame 10, and I can use that information to let the computer help me create an animation. We'll look at this again in animation techniques, but I'm going to select the first keyframe of the span, and I'm going to come down to my Property Inspector, and I'm going to choose Motion from the Tween menu. I'm doing this a little prematurely just to indicate the difference between a regular frame, or in this case a computer interpolated frame, and a keyframe. So, here in frame 1, I can select this item, deselect it, etc. I can manipulate it, and in frame 10, I can do the same thing, but in frame 6 for an example, I can't even select my item. Rather it's intentionally difficult for you to select the item.

I can if I want to, select a frame, and add a new keyframe, but in the case of working on the stage, the idea behind this is that this is not an area where you have introduced new information, and the computer has interpolated all of the between frames between frame 1, and 10, and figured out the position of that circle all the way across the animation again, if you want to insert user-defined information, you need to define a new keyframe. So, we'll choose frame 6, say Insert > Timeline > Keyframe, and now this item is selectable again, we can move it down here for example, and then we can see the computer again, do the work on the interpolated frames, going between frame 1, and 6, and then between six, and 10. So, the keyframe is something that you insert to define new information for your animation, and then through various animation techniques, some of which are computer aided, such as this one, the rest of the frames are interpolated, or otherwise determined. So, we'll look at that again in detail, looking at the animation techniques in a later chapter, but for now I just wanted to stress the idea behind the keyframe, and how it differs from a regular frame.

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This video is part of

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Flash CS3 Professional Essential Training

93 video lessons · 58018 viewers

Rich Shupe
Author

 
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  1. 5m 12s
    1. Welcome
      1m 22s
    2. Using the exercise files and cross-referencing
      3m 50s
  2. 23m 10s
    1. Creating a new document
      3m 34s
    2. The default workspace
      1m 45s
    3. Customizing your workspace
      5m 28s
    4. Reorganizing panels
      3m 52s
    5. Saving workspaces
      1m 50s
    6. Document tabs
      2m 25s
    7. Maximize mode
      1m 26s
    8. Finding help
      2m 50s
  3. 34m 24s
    1. Drawing tool basics
      1m 9s
    2. Drawing with the Pencil and Line tools
      4m 49s
    3. The improved Pen tool
      5m 38s
    4. The Quick Color tools
      1m 10s
    5. Drawing with shapes
      4m 1s
    6. Selecting content
      2m 19s
    7. Manipulating lines and fills
      6m 4s
    8. Painting with brushes
      2m 38s
    9. Erasing content
      2m 29s
    10. Understanding drawing modes
      4m 7s
  4. 16m 3s
    1. Using the Color Mixer
      6m 38s
    2. The Gradient Transform tool
      3m 13s
    3. Color swatches
      6m 12s
  5. 57m 40s
    1. Symbols overview
      7m 23s
    2. Creating and editing symbols
      2m 41s
    3. Nesting and breaking apart symbols
      6m 6s
    4. Working with buttons
      10m 59s
    5. Working with movie clips
      4m 25s
    6. Working with graphics
      5m 8s
    7. Using the Library
      3m 29s
    8. Transformation tools
      5m 15s
    9. Transformation panels
      6m 41s
    10. Transformation menus
      5m 33s
  6. 38m 31s
    1. Using layers
      11m 13s
    2. Adding, deleting, and grouping layers
      3m 35s
    3. What is a keyframe?
      4m 31s
    4. Using frames and keyframes
      6m 30s
    5. Working with multiple frames
      7m 0s
    6. Copying and pasting frames
      2m 45s
    7. Understanding scenes
      2m 57s
  7. 11m 17s
    1. Understanding document settings
      2m 5s
    2. Testing buttons and movie clips
      1m 24s
    3. Testing your movie
      1m 59s
    4. Publishing your movie
      5m 49s
  8. 33m 47s
    1. Vector vs. bitmap
      3m 58s
    2. Importing images and image compression
      8m 26s
    3. Importing Photoshop files
      5m 40s
    4. Importing Illustrator files
      4m 12s
    5. Tracing bitmaps
      7m 20s
    6. Breaking apart bitmaps
      4m 11s
  9. 43m 10s
    1. Shape tweening
      10m 58s
    2. Using shape hints
      2m 23s
    3. Tweening gradients
      3m 44s
    4. Motion tweening
      11m 54s
    5. Copy and Paste Motion
      2m 46s
    6. Motion guides
      4m 2s
    7. Custom easing
      7m 23s
  10. 41m 13s
    1. Understanding text types
      6m 0s
    2. Controlling text appearance
      6m 39s
    3. Simple text effects through tweening
      5m 46s
    4. Adding text to a project file
      19m 11s
    5. Spell-checking and Find and Replace
      3m 37s
  11. 33m 50s
    1. Using filters
      4m 5s
    2. Special filter options
      7m 57s
    3. Animating filters
      8m 8s
    4. Adding filters to a project file
      3m 34s
    5. Using blend modes
      3m 11s
    6. Flash-specific blend modes
      6m 55s
  12. 17m 3s
    1. Components overview
      4m 35s
    2. Adding a UIScrollBar component
      4m 16s
    3. Using a Loader component
      8m 12s
  13. 25m 6s
    1. Adding sound to the timeline
      4m 14s
    2. Adding basic effects to sounds
      4m 43s
    3. Sound sync options
      8m 59s
    4. Adding sound to buttons
      4m 47s
    5. Sound compression basics
      2m 23s
  14. 21m 37s
    1. Embedded vs. external
      3m 28s
    2. Embedding videos with the Flash Video Encoder
      9m 27s
    3. Encoding external FLVs with optional cue points
      4m 14s
    4. Playing external videos with the FLVPlayback component
      4m 28s
  15. 51m 1s
    1. Overview and interface elements
      6m 3s
    2. Frame scripts, tracing, and comments
      6m 8s
    3. Variable basics
      3m 1s
    4. Function basics
      4m 19s
    5. Buttons and EventListeners
      7m 59s
    6. Simple navigation
      16m 11s
    7. Scripting components
      7m 20s
  16. 24m 36s
    1. The story so far
      2m 27s
    2. Animated buttons
      6m 23s
    3. Animated masks
      9m 54s
    4. Publishing your site
      5m 52s
  17. 3m 3s
    1. Additional resources
      1m 12s
    2. Goodbye
      1m 51s

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