3
Table Of Contents
- Compressor 3 User Manual
- Contents
- Welcome to Compressor
- Getting Started Quickly
- Ways to Use Compressor
- The Basic Transcoding Workflow
- The Compressor Interface
- Setting Compressor Preferences
- Importing Source Media Files
- Creating, Previewing, and Modifying Settings
- Finalizing Jobs and Submitting Batches
- Creating AIFF 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 DV Stream Output Files
- Creating H.264 for Apple Devices Output Files
- Creating H.264 for DVD Studio Pro 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 Movie Output Files
- Creating QuickTime Export Component 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
- Appendix A: Keyboard Shortcuts
- Appendix B: Solving Problems
- Resources for Solving Problems
- Solutions to Common Problems
- Exporting from Final Cut Pro and Distributed Processing
- QuickTime Reference Movies
- Cluster Settings for Extended Transcoding Sessions
- Cleaning Up Cluster Storage
- Using Apple Qmaster with an NFS Server
- Apple Qmaster Distributed Processing and Xsan
- Compressor Command-Line Usage Requires Login
- Create Blu-ray Disc Job Action
- Contacting AppleCare Support
- Appendix C: Using the Command Line
- Installing Apple Qmaster from the Command Line
- Using the Command Line for Distributed Processing
- Using Scripts to Run Apple Qmaster, Compressor, and Batch Monitor
LFE Channel
• Apply 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 Channels
• Apply 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.
• Apply 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
• Apply 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.
• Apply 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).
144 Chapter 10 Creating Dolby Digital Professional Output Files