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Video terminology

From: After Effects CC Essential Training

Video: Video terminology

In this video, we're going to cover some terminology most commonly used in Animation is an uncompressed codec, After Affects will default to Here for my green screen footage I'm dealing with MPEG4.

Video terminology

In this video, we're going to cover some terminology most commonly used in video and motion graphics, and the first term I'll start with codec. It stands for compress, decompress. When you're dealing with video files, you'll deal with many different codecs. Now, if we open our Footage folder, I have a couple different Quicktime files we can click on. I'll select the first one here, this Sphere_Spin_Precomp. This codec is the animation codec, you can see codec's listed in your project panel, whenever you select the different pieces of footage.

Animation is an uncompressed codec, After Affects will default to rendering an uncompressed codec whenever you choose the lossless codec. Here for my green screen footage I'm dealing with MPEG4. MPEG4 is a highly compressed codec. And usually it would be less than optimum to try and use that for keyable footage. But in order to have small file sizes, for you to download and work with, we chose MPEG4 as a good mix between a small fill size and still decent quality.

Same thing with the board right here. This is H264, which is another flavor of MPEG4. It's just important to understand, when you're dealing with footage, you can look at the codecs here in your project panel. And uncompressed codecs are typically always more favorable than compressed codecs. The next term we'll deal with is channel. Every image inside of Photoshop, as well as After Effects, is made up of channels. Now if we go to the bottom of our Composition panel, you'll see this little red, green, and blue dot icon here. If I click on that, it'll allow me to view each of the different channels that are used to create that image.

So I'm clicking through the Red channel, the Green channel, and the Blue channel. And when all those mix together for RGB, we get our finished image. The next term we'll use is alpha channel. Alpha channel is the fourth channel that determines transparency for an object. I'm going to switch comps to show you the alpha channel of this logo. I'll click back on the button and choose Alpha, and here I can see, I can drop that log anywhere. While we're here, there's title safe and action safe. These are two area that determine whether or not your graphics will be seen, when you play them back on other televisions.

Most of the time you want text inside of title safe, and your video inside of action safe. Lets go back to our RFB settings here. The next thing is mask. Now, masks are created with the pen tool inside of After Effects, and if we select layer four here, you can see I have created a mask on this individual layer. Now I'm going to solo this layer, and if I open up my Masks here, I can go ahead and change my mask mode. So you can see this mask is cutting out that part of my image.

Masking is a process you'll use a lot to build composites. Compositing is a term that's described for layering multiple elements in a scene to create a finished graphic. As we're looking at masks, there's another term called rotoscoping, and a lot of times with video footage, as the video moves frame by frame, you'll want to cut out that video using masks, and as you adjust the masks, that process is called rotoscoping. You can rotoscope with masks, but you can also rotoscope with other tools like brushes.

There's one more term, called matte. A matte is different from a mask, in that masks are created with the pen tool, and they're drawn on the page. A matte is something that happens naturally with any element that has transparency. For example, our snowboard text up here. I can use that to be a matte, to cut out the background video layer. I'm just going to select my video layer and switch to my Toggles and Modes here. I'll use the Alpha Channel of this word to create a matte to cut out our video layer.

Now I understand going through these terms quickly was a bit of a whirlwind, but these are terms you need to be familiar with, as we move throughout the course, because we'll explore exactly what each of these terms means in depth, but if you haven't heard of the term before, you wouldn't have had a base to start with.

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This video is part of

Image for After Effects CC Essential Training
After Effects CC Essential Training

110 video lessons · 50747 viewers

Ian Robinson
Author

 
Expand all | Collapse all
  1. 1m 8s
    1. What is After Effects?
      1m 8s
  2. 30m 55s
    1. Welcome
      1m 11s
    2. Using the exercise files
      1m 19s
    3. Relinking missing footage
      1m 54s
    4. Working with keyboard shortcuts
      1m 23s
    5. Updating After Effects with Creative Cloud
      1m 25s
    6. Different ways to use After Effects UPDATED
      59s
    7. Exploring the interface of After Effects NEW
      12m 0s
    8. Exploring important preferences and setting up the cache NEW
      6m 20s
    9. Video terminology UPDATED
      4m 24s
  3. 1h 0m
    1. The six foundations of After Effects NEW
      11m 5s
    2. Understanding compositions NEW
      10m 35s
    3. Creating and manipulating layers NEW
      9m 49s
    4. Building animation NEW
      6m 29s
    5. Working with effects NEW
      7m 5s
    6. Introduction to 3D NEW
      8m 45s
    7. Understanding how to render NEW
      6m 48s
  4. 38m 54s
    1. Importing elements NEW
      5m 53s
    2. Organizing projects NEW
      3m 51s
    3. Building compositions with layers NEW
      6m 17s
    4. Animating with keyframes NEW
      10m 0s
    5. Adding effects and graphics NEW
      8m 7s
    6. Output techniques NEW
      4m 46s
  5. 44m 49s
    1. Exploring composition and project settings
      6m 48s
    2. Importing Photoshop files as compositions
      8m 39s
    3. Importing Illustrator files as compositions
      7m 41s
    4. Viewing files in the comp panel
      4m 42s
    5. Understanding Pre-compose
      4m 21s
    6. Positioning layers with snapping
      4m 55s
    7. Interpreting footage
      4m 0s
    8. Keyboard shortcuts for compositions
      3m 43s
  6. 1h 5m
    1. Defining layers
      5m 4s
    2. Creating type layers
      7m 38s
    3. Precise typesetting techniques
      5m 42s
    4. Creating layer solids and shapes with masks
      9m 6s
    5. Creating design elements with shape layers
      6m 10s
    6. Layer compositing: Masks, switches, and blend modes
      7m 35s
    7. Using track mattes
      4m 49s
    8. Precise compositing with variable-width feathered masks
      9m 24s
    9. Working smarter by swapping layers
      7m 6s
    10. Keyboard shortcuts for layers
      2m 35s
  7. 1h 27m
    1. Understanding animation
      6m 20s
    2. Adding and adjusting keyframes
      9m 52s
    3. Understanding keyframe interpolation
      6m 20s
    4. Adjusting keyframes in the Graph Editor
      8m 26s
    5. The power of parenting
      5m 26s
    6. Using null objects
      6m 46s
    7. Creating expressions with the pick whip
      6m 25s
    8. Creating and adjusting motion paths
      9m 56s
    9. Building complex graphics with Pre-compose
      4m 54s
    10. Preparing audio for animation
      8m 57s
    11. Generating graphics with audio
      9m 13s
    12. Working smarter: Navigating the Timeline
      4m 32s
  8. 58m 59s
    1. Understanding the order of effects
      5m 58s
    2. Generating backgrounds with effects
      5m 33s
    3. Generating a scribble effect
      8m 12s
    4. Animating strokes with effects
      6m 37s
    5. Using adjustment layers
      5m 52s
    6. Adding gradients and glows
      4m 30s
    7. Saving pan and scan presets
      5m 20s
    8. Fixing exposure with Levels
      3m 5s
    9. Fixing color casts with Color Finesse 3 NEW
      9m 57s
    10. Masking individual effects NEW
      3m 55s
  9. 55m 24s
    1. Understanding 3D in After Effects
      9m 2s
    2. Intro to cameras
      7m 51s
    3. Intro to lights and material options
      8m 56s
    4. Animating cameras UPDATED
      12m 39s
    5. Creating depth of field
      6m 48s
    6. Exploring the ray-traced 3D renderer
      10m 8s
  10. 1h 43m
    1. Understanding CINEMA 4D Lite and After Effects
      1m 32s
    2. 3D foundations
      10m 43s
    3. Matching CINEMA 4D Lite and After Effects projects
      8m 9s
    4. Understanding the CINEMA 4D Lite interface
      7m 31s
    5. Creating 3D projects from Illustrator files
      7m 28s
    6. Exploring modeling in CINEMA 4D Lite
      8m 8s
    7. Applying deformers
      5m 59s
    8. Understanding materials
      7m 32s
    9. Lighting your scene
      8m 14s
    10. Looking at detailed materials
      7m 51s
    11. Animating in CINEMA 4D Lite
      6m 51s
    12. Animating cameras in CINEMA 4D Lite
      5m 45s
    13. Working with CINEWARE
      9m 38s
    14. Render settings and the multipass workflow
      8m 38s
  11. 23m 35s
    1. Rendering with Adobe Media Encoder
      4m 45s
    2. Recommended settings for rendering graphics
      10m 21s
    3. Creating presets in the Render Queue
      4m 0s
    4. Prerendering with Import and Replace Usage
      3m 18s
    5. Working smarter: One render, multiple outputs
      1m 11s
  12. 29m 3s
    1. Creating type animators
      8m 52s
    2. Creating and animating type on a path
      5m 32s
    3. Animating shape layers
      8m 45s
    4. Animating brushstrokes with Paint
      5m 54s
  13. 23m 31s
    1. Retiming with Time Remapping
      8m 56s
    2. Retiming footage with Timewarp
      9m 10s
    3. Smoothing shaky camera footage with Warp Stabilizer VFX
      5m 25s
  14. 16m 6s
    1. Getting started with Keylight NEW
      8m 43s
    2. Refining your key with Keylight NEW
      3m 42s
    3. Cleaning up keys with masks NEW
      3m 41s
  15. 26m 47s
    1. Rotoscoping with paths
      6m 47s
    2. Introducing the Roto Brush
      5m 58s
    3. Refining the Roto Brush
      6m 12s
    4. Using the Refine Edge tool
      7m 50s
  16. 27m 13s
    1. Creating a single point track
      7m 38s
    2. Applying motion with Warp Stabilizer VFX
      4m 29s
    3. Warp Stabilizer VFX: Reversible Stabilization workflow
      7m 47s
    4. Solving cameras
      7m 19s
  17. 6m 30s
    1. Archiving your projects
      3m 50s
    2. Removing unused footage
      1m 25s
    3. Moving compositions between projects
      1m 15s
  18. 2m 24s
    1. What's next? NEW
      2m 24s

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