Apple Compressor 3 - Manual (Page 349)

One or more new target rows appear on the job, populated from the Droplet's properties,
including settings and destinations.
Droplet Tips
Here are some additional tips on using Droplets to transcode source media files.
Droplets and Compressor Processing Services
If you drag files to a Droplet icon without first opening the application or opening a
Droplet, Compressor may display an alert message (“This computer is unavailable”),
indicating that Compressor processing services have not yet started up in the background.
Click Submit at the bottom of the Droplet window. Compressor processing services will
start up and transcode the files.
Droplets and Large Numbers of Source Media Files
If you submit a large number of source media files (such as 200 or more) using a Droplet,
there may be a delay of about 1 minute between the “Getting ready for processing” alert
message and the dialog reporting that the job is being submitted. You can avoid this
reporting delay by reducing the number of source files you submit at one time with a
Droplet.
349 Chapter 28 Using Droplets