4
Table Of Contents
- Compressor 4 User Manual
- Contents
- Welcome to Compressor
- Getting Started Quickly
- Ways to Use Compressor
- The Basic Transcoding Workflow
- The Compressor Interface
- Compressor Windows and the Transcoding Workflow
- Creating and Managing Compressor Layouts
- Working with the Compressor Windows
- Batch Window
- Settings Tab
- Destinations Tab
- Inspector Window
- History Window
- Preview Window
- Apple Qmaster Sharing Window
- Share Monitor
- Droplet Windows
- About Changing Values and Timecode Entries
- Keyboard Shortcuts
- Setting Compressor Preferences
- Importing Source Media Files
- Creating, Previewing, and Modifying Settings
- Finalizing Jobs and Submitting Batches
- Creating AIFF Files
- Creating Common Audio Format Files
- Creating DV Stream Output Files
- Creating Dolby Digital Professional Output Files
- About the Dolby Digital Professional Encoder Pane
- General Information About Creating Dolby Digital Professional Files
- Converting Stereo Audio Files to Dolby Digital Professional Format
- Assigning Files to Surround Sound Channels (Manual Method)
- Assigning Files to Surround Sound Channels (Automatic Methods)
- Assigning Files to Surround Sound Channels with Droplets
- Options for Spatial Mixing
- Creating H.264 for Apple Devices Output Files
- Creating H.264 for Blu-ray Disc
- Creating Image Sequence Files
- Creating MP3 Output Files
- Creating MPEG-1 Output Files
- Common Uses for MPEG-1
- MPEG-1 Specifications
- About the MPEG-1 Encoder Pane
- About the MPEG-1 Video Tab
- About the MPEG-1 Audio Tab
- About System and Elementary Streams
- MPEG-1 Transcoding Workflow
- Configuring the MPEG-1 File Format for Web Use
- Configuring the MPEG-1 File Format for DVD Use
- Creating the MPEG-1 Video for DVD Setting
- Creating the MPEG-1 Audio for DVD Setting
- Optional—Creating an MPEG-1 for DVD Group and Destination
- Creating MPEG-2 Output Files
- Creating MPEG-4 Output Files
- About MPEG-4 Part 2
- About the MPEG-4 Part 2 Encoder Pane
- Using Default MPEG-4 Part 2 Settings
- Customizing MPEG-4 Part 2 Settings
- Audio Podcasting Workflow
- Stage 1: Configuring the MPEG-4 Output for Audio-Only Output
- Stage 2: Including Podcasting Information
- Stage 3: Applying the Setting to a Source Media File’s Target
- Stage 4: Entering Annotations for the Output Media File
- Stage 5: Creating and Configuring Markers for the Output Media File
- Stage 6: Submitting the Job and Verifying the Output Media File
- Adding Additional Settings and Presets
- Creating QuickTime Export Component Files
- Creating QuickTime Movie Output Files
- Adding Filters to a Setting
- Working with Frame Controls
- Adding Geometry Settings
- Adding Actions
- Using the Preview Window
- Creating and Changing Destinations
- Using Droplets
- Apple Qmaster and Distributed Processing
- Distributed Processing Basics
- Basic Components of the Apple Qmaster Distributed Processing System
- Getting Started Quickly Using This Computer Plus
- Getting Started Quickly Using QuickClusters
- The Interfaces in the Apple Qmaster Distributed Processing System
- Apple Qmaster Sharing Window of Compressor
- General Information About Clusters
- Options in the Apple Qmaster Sharing Window of Compressor
- Managed vs. Unmanaged Services
- Turning Cluster Controller Services On or Off
- Using Virtual Clusters to Make the Most of Multicore Computers
- Setting a Service Password for Including a Computer in a Cluster
- Scheduling Service Availability
- Using Cluster Storage
- Defining Ports for Service Advertisements
- Recovery and Failure Notification Features
- Creating Clusters with Apple Qadministrator
- Setting Up for Part-Time Distributed Processing with Shake
- Appendix A: Keyboard Shortcuts
- Appendix B: Solving Problems
- Appendix C: Using the Command Line
LFE Channel
• Low-Pass Filter: Select this checkbox to apply a 120 Hz low-pass filter to the Low
Frequency Effects (LFE) channel. Turn off this filter if the digital signal fed to the LFE’s
input does not contain information above 120 Hz.
Full Bandwidth Chan.
• Low-Pass Filter: Select this checkbox to turn on a low-pass filter with a cutoff near the
available audio bandwidth that is applied to the main input channels. If the digital
signal fed to the main input channels does not contain information above the available
audio bandwidth, you can turn off this filter. Compressor will automatically determine
the available bandwidth.
• DC Filter: Select this checkbox to turn on a DC high-pass filter for all input channels as
a simple way to remove DC offsets. Most mixed audio material is already free of DC
offsets.
Surround Channels
• 90º Phase Shift: Select this checkbox to generate multichannel AC-3 streams that can
be downmixed in an external two–channel decoder to create true Dolby
Surround-compatible output.
• 3 dB Attenuation: Select this checkbox to apply a 3 dB cut to the surround channels of
a multichannel film soundtrack being transferred to a consumer home theater format.
Cinema surround channels are mixed 3 dB “hot” (higher) relative to the front channels
to account for cinema amplifier gains.
General Information About Creating Dolby Digital Professional
Files
Following are some things to keep in mind as you configure and encode Dolby Digital
Professional AC-3 files.
About the Source Media Files
There are a few guidelines to be aware of when encoding Dolby Digital Professional
output files from your source media files.
Depending on the format, a file can contain a single channel (mono), dual channels
(stereo), or multiple channels. Compressor supports Dolby Digital Professional in all these
configurations.
Sound files intended for Dolby Digital Professional encoding must conform to the following
rules:
• All source files should be the same length. (If they are not, Compressor sets the length
of the AC-3 stream to match the length of the longest file.)
• All files must have a 48 kHz sample rate (as required for DVD).
150 Chapter 12 Creating Dolby Digital Professional Output Files