118 VIDEO EDITORTo animate a video filter:1. Select a clip and open the Video Filters dialog box as previously described.2. Select the Colored Pen filter from the Available filters box and click the Addbutton. The Colored Pen filter will now appear in the Applied filters box.3. Click the Options button to open the Colored Pen dialog box.4. Click on the first key frame diamond and then drag the Level slider to 80.5. Click on the last key frame diamond and drag the Level slider to 0.6. Click OK and preview the effect.Applying a regional matte to a video filterWhen you apply a video filter it affects the entire frame of a video clip. There maybe times however when you would prefer it to only affect a certain portion of theclip, such as a highlighted area or a specific scene in the background. You can dothis by first creating an image or video matte (see “Creating image and videomattes” on page 114) and then loading the matte into the Video Filters dialog box.See the next page for details.If you do not have a matte to use then specifying a region has little benefit.Colored Pen level setto 80 at the first keyframeUsing key frames toanimate a ColoredPen video filterColored Pen level setto 0 at the last keyframeOriginal clip Image matte Combined result
