Apple Compressor (4.0) - Manual (Page 105)

Chapter 5 Custom settings and output formats 105
Stage 4: Add targets with an MP3 setting to each of the jobs
Each of the jobs requires at least one target—in this case the jobs need targets with an MP3
setting. If there is more than one job, it’s easiest to select all the jobs by choosing Edit > Select All
and then choose Target > New Target With Setting to apply the same setting to all the jobs.
Stage 5: Submit the batch for transcoding
To start the transcoding process, click the Submit button. For more information, see
Submit a
batch on page 147.
Create MP3 settings
You make your MP3 settings by either modifying an existing setting or creating a new setting in
the Settings tab.
Create an MP3 setting
1 In the Settings tab, select a setting or create a new setting by choosing MP3 from the Create a
New Setting (+) pop-up menu.
2 Choose MP3 from the File Format pop-up menu in the MP3 Encoder pane of the Inspector.
Note: Because job segmenting isn’t used for audio-only encodes, the Allow Job Segmenting
checkbox is dimmed.
3 To configure settings manually, choose from the following options:
•
Stereo Bit Rate: Choose a bitrate from the pop-up menu.
The higher the bit rate that you choose, the higher the audio quality and the larger the file size.
The most common bit rate for stereo MP3 files is between 128 kbps and 192 kbps. Lower bit rates
are more appropriate for sound files containing voice recordings (as opposed to music).
Here are some example settings:
•
32 kbps: AM radio quality, suitable for medium-quality speech
•
96 kbps: FM radio quality, suitable for high-quality speech or medium-quality music
•
128 kbps: Suitable for good-quality music
•
256 kbps and 320 kbps: Suitable for music that is near CD quality