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
3 Choose an average bit rate using the Average Bit Rate slider or field or click the Automatic
button.
Choose an appropriate bit rate based on the content and length of your source video
and the intended size (in bytes) of your output file. In DVD authoring, the entire video
must fit on the DVD disc—the lower the bit rate, the more data you can store. However,
the higher the bit rate, the better the image quality will be.
As you change the Average Bit Rate value (with the slider or the field), the bit-rate
calculator at the bottom of the Quality tab dynamically shows the maximum number of
minutes of video on a DVD-5. The calculator assumes 1.5 Mbps for audio (two-channel
AIFF).
See the table below for some average bit rates and corresponding footage times for a
4.7 GB DVD.
4 If available, use the Maximum Bit Rate slider or field to set a maximum bit rate.
Because SD DVD players support peak bit rates of up to 10.08 Mbps for video plus audio,
you should set the maximum video bit rate between 8.0 and 8.5 Mbps if you are using a
1.5 Mbps (two-channel AIFF) audio track.
Note: For best results, make sure the maximum bit rate is at least 1 Mbps higher than
the average setting. Larger differences can produce better results.
5 Choose one of the following settings from the Motion Estimation pop-up menu:
• Good: The fastest motion estimation setting—sufficient when there is relatively low
motion between frames
• Better: A good general-purpose motion estimation setting—provides very good results
even in the presence of complex interlaced motion
• Best: The highest quality setting to handle the most demanding and complex motion
for interlaced sources—somewhat slower than the Better mode
See Quality Tab for more information.
The following table shows some average bit rates and corresponding footage times for
a 4.7 GB DVD:
Approximate duration for 4.7 GB DVD
Average bit rate
1
121 minutes3.5 Mbps
94 minutes5.0 Mbps
82 minutes6.0 Mbps
68 minutes7.5 Mbps
65 minutes8.0 Mbps
1 For a DVD clip with video, audio, and subpictures: assumes 1.5 Mbps for audio (two-channel AIFF).
215Chapter 18 Creating MPEG-2 Output Files