Apple Compressor 3 User Manual Page 208
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Important: Generic is the only Stream Usage setting that supports transport and
program streams. Selecting the Multiplexed MPEG-1/Layer 2 Audio checkbox sets your
stream usage to Generic if it is currently anything else.
MPEG-2 Reference Information
The following sections contain useful information for creating MPEG-2 output media files.
About Choosing the Bit Rates
When determining average and maximum bit rates for standard DVD playback, remember
to consider the bit rate of your audio track as well as the MPEG-2 bit rate.
You must keep the total of both average and maximum audio and video bit rates under
10.08 Mbps, the maximum guaranteed transfer rate from standard DVD players. Because
DVD-compatible audio formats are constant bit rate (CBR), there is no maximum audio
bit rate to worry about.
For example, if you are using AIFF audio at 1.5 Mbps, you should keep both the average
and maximum video bit rates under 8.5 Mbps. Typically, your average bit rate will be
lower than this (for example, 3.5 Mbps for 2 hours of footage on your DVD). However,
your maximum bit rate must also stay below this number. A maximum bit rate of 8.0 Mbps
is recommended to provide an extra margin for error (for example, to accommodate
subtitle streams). If you are using one of the DVD-compatible compressed audio formats
such as Dolby Digital or MPEG-1/Layer-2, your audio bit rate may be as low as 0.2 to
0.4 Mbps, in which case you can set your maximum bit rate about 1 Mbps higher.
Also, as a general rule, set your maximum bit rate at least 1 Mbps higher than your average
bit rate, to allow for bit-rate variability in achieving the goal of constant quality.
MPEG-2 Video Frame Sizes and Formats
Since MPEG-2 uses fixed video frame sizes, Compressor enters the output frame size in
the fields in the Geometry pane based on your video format selection.
The video format you choose in the Video Format pop-up menu determines the options
for the associated characteristics such as frame size and rate, aspect ratio, and field
dominance. For more information, see Video Format Tab.
Scanning methodAspect ratioFrame rate (fps)
Frame size
(pixels)Video format
Interlaced,
progressive
4:3 or 16:923.98 (progressive
only), 29.97
720 x 480NTSC
Interlaced,
progressive
4:3 or 16:925720 x 576PAL
Progressive16:923.98, 25, 29.97,
50, 59.94
1280 x 720720p
208 Chapter 18 Creating MPEG-2 Output Files
- Compressor 3 1
- Contents 3
- 4 Contents 4
- 5Contents 5
- 6 Contents 6
- 7Contents 7
- 8 Contents 8
- Welcome to Compressor 9
- Additional Resources 10
- Getting Started Quickly 11
- Stage 3: Submitting the Batch 15
- Ways to Use Compressor 25
- Typical Compressor Scenarios 26
- Compressor Features 27
- Compressor Concepts and Terms 29
- Choosing an Output Format 34
- Creating a Compressor Batch 35
- Viewing Transcoding Status 37
- Optional Compressor Shortcuts 37
- Working with Droplets 38
- The Compressor Interface 39
- Standard Layout 41
- Batch Layout 42
- About the Layout Files 43
- Drag this corner to resize 44
- About the Tabs 45
- Batch Window 47
- Customizing the Toolbar 48
- About the Toolbar Items 49
- Settings Tab 50
- About the Automatic Settings 52
- About the Settings Panes 56
- History Window 61
- Preview Window 61
- Marker pop-up menu 62
- Droplet Windows 64
- Using Value Sliders 65
- About Compressor Preferences 67
- Using Compressor Preferences 70
- Importing Source Media Files 75
- Untitled batch tab 77
- Empty batch area with 77
- Click a channel’s icon to 83
- A/V Attributes Tab 86
- Additional Information Tab 87
- Job Action Tab 89
- Importing MPEG-2 Files 90
- Creating, Previewing, and 93
- Modifying Settings 93
- Settings Tab Buttons 94
- Settings List 95
- Selecting a Target 97
- Duplicating Settings 98
- Previewing a Setting 101
- Output view 102
- Batch Item 102
- Source view 102
- Batch Item pop-up menu 102
- Deleting Settings 103
- Creating Groups of Settings 104
- This custom group 105
- Assigning Settings 109
- New targets are added 111
- Modifying an Assigned Setting 113
- Assigning Destinations 114
- Drag the destination 115
- Select a destination 115
- Setting the Output Filename 116
- About Targets 117
- About Adding and Copying Jobs 118
- About Chaining Jobs 118
- General Batch Information 119
- Click the warning 120
- Test Transcode Tip 121
- About the History Window 121
- Resubmitting a Batch 122
- Unique file identifiers 125
- The In point 125
- The Out point 125
- The Final Cut Pro 126
- Creating AIFF Files 133
- About the AIFF Encoder Pane 134
- Configuring AIFF Settings 136
- Output Files 137
- Basic Settings 138
- Audio Tab Settings 139
- Bitstream Tab Settings 142
- Preprocessing Tab Settings 143
- About the Source Media Files 144
- Methods) 149
- Options for Spatial Mixing 151
- Accommodating Stereo Playback 152
- The Automatic buttons 153
- Ratio, and Field 153
- Order values 153
- DV Transcoding Workflow 154
- The Aspect Ratio 158
- Automatic button 158
- The Frame Rate 158
- The Video Format 164
- About the Frame Sync Setting 167
- About the Bit-Rate Settings 167
- H.264 Workflows for DVD 168
- Creating Image Sequence Files 173
- Creating MP3 Output Files 177
- About the MP3 Encoder Pane 178
- MP3 Transcoding Workflow 179
- Creating MPEG-1 Output Files 181
- MPEG-1 Specifications 182
- About the MPEG-1 Encoder Pane 183
- About the MPEG-1 Video Tab 184
- About the MPEG-1 Audio Tab 185
- MPEG-1 Transcoding Workflow 186
- Example MPEG-1 Settings 187
- Deselect to disable 191
- The file extension 192
- Creating MPEG-2 Output Files 195
- HD on DVD 196
- HD to SD Downconversion 196
- About the MPEG-2 Encoder Pane 197
- Stream Usage 198
- Video Format Tab 199
- Quality Tab 201
- Extras Tab 207
- MPEG-2 Reference Information 208
- More About GOPs and Markers 210
- MPEG-2 Transcoding Workflow 213
- Average bit rate 216
- 121 minutes3.5 Mbps 216
- 94 minutes5.0 Mbps 216
- Working with MPEG-2 I-Frames 218
- Example MPEG-2 Settings 219
- Creating MPEG-4 Output Files 221
- Video Pane 223
- Audio Pane 224
- Streaming Pane 225
- Default Video Pane Settings 226
- Default Audio Pane Settings 226
- Either enter a number 228
- Audio Podcasting Workflow 230
- Choose items from this 232
- Format pop-up menu 241
- Rate field and pop-up 241
- Show Advanced Settings 241
- Choosing an Audio Codec 242
- Choose a video codec 244
- Type pop-up menu 244
- Choose an audio codec 245
- Understanding Codecs 246
- QuickTime Video Codecs 246
- QuickTime Audio Codecs 247
- Sound Sample Size 248
- Creating QuickTime Export 249
- Component Files 249
- About the iPod Plug-in 250
- Configure settings 252
- Adding Filters to a Setting 253
- Previewing Filters 254
- About the Filters Pane 255
- Video Filters Tab 256
- Audio Filters Tab 263
- Color Tab 265
- Drag filters up or down 267
- Working with Frame Controls 269
- Selection pop-up menu 274
- About Deinterlacing 275
- About Reverse Telecine 276
- About the Cadence 278
- Other Reverse Telecine Issues 278
- Using the Retiming Controls 279
- Adding Geometry Settings 283
- About the Geometry Pane 285
- Adding Actions 293
- About the Actions Pane 294
- How to Add Setting Actions 295
- Using AppleScript Droplets 296
- Adding Job Actions 297
- About Job Actions 298
- 299Chapter 25 Adding Actions 299
- 300 Chapter 25 Adding Actions 300
- 301Chapter 25 Adding Actions 301
- 302 Chapter 25 Adding Actions 302
- 303Chapter 25 Adding Actions 303
- 304 Chapter 25 Adding Actions 304
- 305Chapter 25 Adding Actions 305
- 306 Chapter 25 Adding Actions 306
- 307Chapter 25 Adding Actions 307
- Using the Preview Window 309
- In and Out Controls 311
- Preview Screen Area 312
- Timeline Controls 312
- Transport Controls 313
- Marker Pop-Up Menu 314
- Previewing a Clip 315
- Cropping dimensions 319
- (also displayed in the 319
- Inspector window when 319
- Adding Markers to a Clip 321
- Types of Markers 322
- A blue marker appears 324
- Creating and Changing 329
- Destinations 329
- About the Destinations Tab 330
- Host Name is required 331
- File Path is required 331
- Creating a Destination 333
- Filename Template 334
- Warning Triangles 335
- Remove button 336
- Duplicate button 337
- The duplicated 337
- Template field 338
- Using Droplets 339
- Creating Droplets 340
- 341Chapter 28 Using Droplets 341
- About the Droplet Window 342
- 343Chapter 28 Using Droplets 343
- Checking Droplet Settings 344
- 345Chapter 28 Using Droplets 345
- 346 Chapter 28 Using Droplets 346
- 347Chapter 28 Using Droplets 347
- 348 Chapter 28 Using Droplets 348
- Droplet Tips 349
- Keyboard Shortcuts 351
- Solving Problems 353
- QuickTime Reference Movies 356
- Cleaning Up Cluster Storage 356
- Contacting AppleCare Support 358
- Using the Command Line 359
- Example of Shake Command XML 365
- Batch Monitor 367
- Compressor Script Example 368
- Batch Monitor Script Example 368
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