| |
|
| 1. | Create a sequence with three video layers. |
| 2. | Edit the background image onto track V1. |
| 3. | Edit the foreground image onto track V2. |
| 4. | Load a high-contrast image into the Source monitor, and edit it onto track V3. The high-contrast image can be an imported graphic or a clip that you adjust within the Avid editing application. |
 | If the image does not have an alpha channel for keying the graphic over video, use the procedure described in Editing with Imported Master Clips to edit the image onto track V3. |
| If the image is not high enough in contrast, you can adjust the contrast by applying the Color Effect and adjusting its parameters in Effect mode. For more information, see Using the Color Effect to Prepare a High-Contrast Image. |
| 5. | Open the Effect Palette by doing one of the following: |
| In the Project window, click the Effects tab. |
|
| Select Tools > Effect Palette. |
| 6. | Click the Key category. |
| 7. | Apply the Matte Key effect as follows: |
|
| If your high-contrast image was created with the Color Effect, press and hold the Alt key (Windows) or Option key (Macintosh) and drag the Matte Key Effect icon from the Effect Palette onto the segment on track V3 to nest the Color Effect within the Matte Key effect. |
|
| If your high-contrast image on track V3 does not include a Color Effect, drag the Matte Key Effect icon from the Effect Palette onto the segment on track V3. |
| 8. | Click the Record Track Monitor button for track V3 in the Track Selector panel. You should see tracks V2 and V1 through the high- contrast image on track V3. |
| 9. | Move the position indicator to the Matte Key effect, and render the effect. |
