Apple Compressor 2 - Manual (Page 207)

Chapter 15 Adding Frame Controls, Geometry, and Actions to a Setting 207
4 Click the Choose button.
The File Selection dialog appears.
5 Navigate to the relevant AppleScript file and click Open.
The path to the AppleScript file appears below the Choose button. Make sure the
checkbox is selected; otherwise, the AppleScript won’t be applied to the setting.
See “ About the Actions Pane ” on page 205 for more details.