Week 6 - Spring 2006
Setting up your compositions
If you are working with a particular kind of video (DV for instance), start off with a comp that matches your target codec. But if you need to, you can always place one comp inside another comp to re-size it. For example you can place a 720 x 540 comp inside of a 720 x 480 comp to output it for DV.
Clips can be trimmed in the Timeline or in the Layer Window. Import a video clip into the Timeline. Slide the layer to the right a little so it doesn't start at 0. Double click the clip in the Timeline to open the layer window. The display shows 3 sets of counter numbers: in point, out point and duration.
Position the Layer window so you can see the Timeline. Note the in and out points in the Timeline. Move the time indicator somewhere near the beginning of the clip and press the in-point button. The duration value in the Layer window updates accordingly and the clip slides forward in the Timeline.
Now try dragging the triangulur handle in the Timeline. This is another way you can move in and out points.
As you may know, pressing the left bracket [ button re-positions the layer to begin at wherever the time indicator is. With video clips, it will reposition the layer's in point to the current time indicator.
Once you have a video clip (or any other layer that changes over time) in your Timeline, you may want to slide the video around without messing up your in and out points relative to the Timeline. In other words you want to do a slip edit.
Position the video clip so you can see the in and out points. Select the Pan Behind tool from the Tools palette and position the pointer over the video clips. It changes into a left-right arrow. You're now in Slip mode. Try dragging the pointer to the left and right with your video clip layer selected. It slides the clip around while retaining the in and out points relative to the Timeline.
Time Stretching is easy in After Effects. As with most effects, there are a number of ways you can access it.
In the Time Stretch window you can either enter a value other than 100% or make a new duration.
Note that you can also select a different item to hold in place other than the Layer in point, (which is the default as it's what we usually expect when we enable slow motion or fast motion).
Note: Time stretching is NOT a good way to change the duration of still images.
Time remapping is a bit more interesting than simple time stretching. You can use it to vary time and the rate in which motion changes occur.
To use it first import a comp or a video clip. (something with movement)
The, highlight the layer and select Layer -> Enable Time Remapping.
Expand the layer's arrows to show the time remapping controls. You'll see two keyframes. One at the start of the clip, the other at the end.
What the numbers mean:
Try adding a couple keyframes in the middle. Then you can slide the time values p and down, or the keyframes left and right.
You can duplicate many popular wipe transitions with the transition tools. To use these you'll need to set two keyframes, one at the beginning of the transtion and one at the end.
Motion Tour & Overview
Motion is a new tool from Apple that simplifies the process of creating complex motion graphics.
Motion is format and resolution independent. You can work in a variety of formats from small multimedia movies to DV and HD.
View Apple's Motion Quicktours
Getting Started with Motion
Project Properties (under the edit menu) - This allows you to setup the dimensions of your project, the timing, background color, etc.
Good Motion Shortcuts:
Work through the getting started with motion tutorial (The one with the dolphins)
Make a folder (give it your login name) in the T454 week6 folder on the Scratch drive. Place your completed tutorial in your folder along with a critique. The critique should be a paragraph or two describing your initial impressions of Motion. What was easy or difficult?