Job action tab, Tips on importing source media files, Highly compressed source files – Apple Compressor 3 User Manual
Page 89: Quicktime reference movies

Job Action Tab
The Job Action tab allows you to apply and/or adjust post-transcoding actions to entire
jobs.
For complete details on using the Job Action tab, see
and
.
Tips on Importing Source Media Files
Here are some additional tips on importing source media files.
Highly Compressed Source Files
It is strongly recommended that you do not use highly compressed source files, such as
MPEG files, as your source files, because they can cause undesirable artifacts in the encoded
video.
QuickTime Reference Movies
If you submit a reference movie for distributed processing, the Apple Qmaster distributed
processing system will automatically copy the appropriate media files to the processing
cluster. For the best performance, you can avoid this file transfer step by making sure
that the media files specified in the reference movie are available to each node of the
Apple Qmaster cluster. For more information, see the Distributed Processing Setup Guide,
available in Compressor Help, and
Exporting from Final Cut Pro and Distributed Processing
.
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Chapter 6
Importing Source Media Files