4.5

145Compressor User Guide
• Fade In/Out: Adds an audio fade-in effect at the beginning of the clip and a fade-out at
the end of the clip. The Fade In/Fade Out filter contains the following properties:
• Fade in duration: Enter a value in the text field or move the slider to set the length of
the fade in seconds.
• Fade out duration: Enter a value in the text field or move the slider to set the length
of the fade out in seconds.
• Fade in gain: Drag the slider to set the value between –100.0 (silence) and 0.0 (the
audio’s volume) to define the audio volume at which to start the fade in.
• Fade out gain: Drag the slider to set the value between –100.0 (silence) and 0.0 (the
audio’s volume) to define the audio volume at which to end the fade out.
• Peak Limiter: Sets the level of the loudest audio allowed in the clip. Drag the Gain slider
to set the level above which louder peaks are reduced.
Work with metadata annotations in Compressor
You can embed metadata into files transcoded using the Apple Devices, Apple ProRes,
MP3, MPEG-4, and QuickTime settings. Use metadata to annotate a media file with
information that’s important for your workflow or for the person viewing your output file.
You can add any of the annotation fields provided in Compressor, import metadata that’s
used in another media file (like a QuickTime movie), or pass through existing metadata.
Manually add annotations to a media file
1. In the Compressor batch area, select the job that contains the media file you want
to annotate.
Tip: To select the job, rather than an output row under the job, click the source
filename at the top of the job area.
2. In the Job Annotations area of the Job inspector, click the Fields pop-up menu, choose
an annotation type, then enter text in the field that appears.
3. Repeat step 2 for each annotation type you want to add.
The annotations you added are shown in fields below the pop-up menu.
Note: If you see the message “Some source file annotations cannot be displayed,” your
job contains metadata—lyrics, for example—that Compressor cannot display. See Modify
pass-through metadata.
Import annotations from an external file
You can import metadata annotations into Compressor from an external QuickTime movie
or from an XML dictionary property list, a text file used in macOS, iOS, and iPadOS
programming frameworks to store metadata categories and values (keys and strings).
For detailed information about XML property lists, see the Apple Developer document
What Is a Property List?
1. In the Compressor batch area, select the job that contains the media file you want
to annotate.
Tip: To select the job, rather than an output row under the job, click the source
filename at the top of the job area.