4.5

140Compressor User Guide
Change the format of a source audio track
1. In the Compressor batch area, click the job containing the source file you want
to modify.
2. In the Audio Tracks section of the Job inspector, click the pop-up menu corresponding
to the audio track you want to modify, then choose a configuration style.
Depending on how many channels are in the audio track, different options appear in the
pop-up menu. For example, a track with two channels can be configured as Stereo, Dual
mono, 1.1, and so on. A track with one channel can be configured as Left, Right, Center,
Left Surround, Right Surround, and so on.
3. Repeat step 2 as necessary for any other tracks.
Disable a source audio track
1. In the Compressor batch area, click the job containing the source file you want
to modify.
2. In the Audio Tracks section of the Job inspector, deselect the checkbox to the left of
the audio channel you want to disable.
The track is turned off and will not be included in any transcoded files created by
that batch.
Tip: iTunes Store packages have specific audio requirements. You can use the methods
described above to ensure that your audio is properly assigned for a successful submission
to the iTunes Store.
Add video and audio effects
Add and remove effects in Compressor
Compressor provides a variety of video and audio effects that you can use to improve the
quality of the video and audio in the transcoded file. Video effects modify specific visual
aspects of your source media, such as brightness and contrast, color, noise levels, and
interlacing. Audio effects modify sound aspects in your source media, such as dynamic
range, peaking, and equalizer effects.
Because effects are processed one by one by Compressor during transcoding—starting
with the first item in the list—it’s important that you add the effects in the order you want
them applied. For example, it’s sensible to add a text overlay effect last in your list of
effects so that its text color isn’t modified by other effects.
To add an effect to an output file, you add the effect to a setting and then use that
setting to output your source file. You can view both the source file and a preview of
the transcoded file in the preview area.
You can also assign a custom or creative lookup table (LUT) to give your video a
specific look.
Important: As with other properties you add to a setting, effects you add to a built-in
setting are not saved for future use. If you want to save the effects you apply to a setting,
you must create a custom setting by duplicating the built-in setting that contains the
effects. See Create custom settings in Compressor.