User manual FALMEC ICON INSTALLATION SHEET

[. . . ] Every effort has been made to ensure that the information in this manual is accurate. Note: Because Apple frequently releases new versions and updates to its system software, applications, and Internet sites, images shown in this manual may be slightly different from what you see on your screen. Apple 1 Infinite Loop Cupertino, CA 95014 408-996-1010 www. apple. com Apple, the Apple logo, AppleScript, Apple TV, Bonjour, DVD Studio Pro, Final Cut, Final Cut Pro, Finder, FireWire, iPhone, iPod, iTunes, Mac, Mac OS, QuickTime, Shake, and Xsan are trademarks of Apple Inc. , registered in the U. S. “Dolby, ” “Pro Logic, ” and the double-D symbol are trademarks of Dolby Laboratories. [. . . ] • IBP: One B-frame is used between reference frames (I-frames and P-frames) with IBP. Choose this setting only if your media contains fast motion that does not encode with sufficient quality using an IBBP structure. • IBBP: Use IBBP for the majority of MPEG-2 encoding situations, along with a GOP size of 15 for NTSC, or 12 for PAL. Two B-frames are used between reference frames with this setting. Chapter 18 Creating MPEG-2 Output Files 203 • Open and Closed buttons: Closed GOPs do not contain any frame that refers to a frame in the previous or next GOP, while open GOPs begin with one or more B-frames that reference the last P-frame of the previous GOP. Closed GOPs created by the Compressor MPEG-2 encoder begin with an I-frame. Select your GOP type (open or closed) based on whether and how you create chapter markers for DVD authoring and whether you intend to use multiple video angles in your title. • GOP Size pop-up menu: Choose how many frames are contained within your GOP, following the format of the chosen GOP structure. The maximum GOP size you can choose within Compressor is 15 frames (NTSC) or 12 frames (PAL and 720p). The minimum GOP size for all video formats is 6 frames (closed GOP) or 7 frames (open GOP). The relationship between GOP structure and GOP size gives you GOP patterns. See Understanding GOPs and Frame Types and GOP Size for more information. • Pattern field: This field cannot be edited but displays the actual GOP pattern based on your chosen GOP structure and size. 204 Chapter 18 Creating MPEG-2 Output Files Extras Tab You use the Extras tab to control the inclusion or exclusion of specific MPEG-2 authoring information. 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. Video format NTSC PAL 720p Frame size (pixels) 720 x 480 720 x 576 1280 x 720 Frame rate (fps) 23. 98 (progressive only), 29. 97 25 23. 98, 25, 29. 97, 50, 59. 94 Aspect ratio 4:3 or 16:9 4:3 or 16:9 16:9 Scanning method Interlaced, progressive Interlaced, progressive Progressive 206 Chapter 18 Creating MPEG-2 Output Files Video format HD 1440 x 1080 HD 1920 x 1080 640 x 480 (1. 33) 640 x 360 (1. 78) 640 x 352 (1. 82) 640 x 384 (1. 67) 640 x 320 (2. 00) Frame size (pixels) 1440 x 1080 1920 x 1080 640 x 480 640 x 360 640 x 352 640 x 384 640 x 320 Frame rate (fps) 23. 98 (progressive only), 25, 29. 97 23. 98 (progressive only), 25, 29. 97 23. 98, 25, 29. 97 23. 98, 25, 29. 97 23. 98, 25, 29. 97 23. 98, 25, 29. 97 23. 98, 25, 29. 97 Aspect ratio 16:9 16:9 4:3 or 16:9 4:3 or 16:9 4:3 or 16:9 4:3 or 16:9 4:3 or 16:9 Scanning method Interlaced, progressive Interlaced, progressive Interlaced, progressive Interlaced, progressive Interlaced, progressive Interlaced, progressive Interlaced, progressive Understanding GOPs and Frame Types A major feature of MPEG-2 encoding is its ability to remove redundancy, not only within a frame, but also among a group of frames. A group of pictures (GOP) setting defines the pattern of the three frame types used. The I-frame is the only MPEG-2 frame type which can be fully decompressed without any reference to frames that precede or follow it. If you want to place an I-frame at a scene change or some other specific frame location, you need to manually set it using the Preview window. • Predicted (P): Encoded from a “predicted” picture based on the closest preceding I- or P-frame. P-frames typically require much less disk space than do I-frames because they reference a preceding I- or P-frame in the GOP. Note: Both I-frames and P-frames are also known as reference frames, because a B-frame may refer to either one or both frame types. • Bi-directional (B): Encoded from an interpolation of succeeding and preceding reference frames, either I-frame or P-frame. [. . . ] Submit a Job with No Password The following submits a job to a cluster identified by a name that does not have a password. /Applications/Compressor. app/Contents/MacOS/Compressor -clustername MyCluster -batchname "My First Batch" -jobpath ~/Movies/MySource. mov -settingpath ~/Library/Application\ Support/Compressor/Settings/MPEG-4. setting -destinationpath ~/Movies/MyOutput. mp4 -timeout 5 This command has the following elements: • Identifies where Compressor is located. • Assigns the batch name My First Batch (the quotation marks are used because of the spaces). • Finds the MySource. mov file for the job at ~/Movies/MySource. mov. • Uses the MPEG-4 setting at ~/Library/Application\ Support/Compressor/Settings/MPEG-4. setting (the “\” character is used in this case to retain the space in “Application Support”). [. . . ]