User manual FALMEC ICON INSTALLATION SHEET

[. . . ] The Apple logo is a trademark of Apple Inc. , registered in the U. S. Use of the “keyboard” Apple logo (Shift-Option-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for printing or clerical errors. [. . . ] See Understanding GOPs and Frame Types for more information. 202 Chapter 18 Creating MPEG-2 Output Files Note: If you choose any of the HD video formats in the Video Format tab, the settings in the GOP tab cannot be changed and default to a closed IBBP GOP structure with a size of 12 (for PAL) or 15 (for NTSC). • GOP Structure pop-up menu: Choose an option from this pop-up menu to specify whether there will be two, one, or no B-frames between the reference frames within a GOP. GOP structure, along with GOP size, determines the number of I-frames, P-frames, and B-frames that are used within a GOP during encoding. Choose from one of the following: Note: For most MPEG-2 encoding situations intended for use on a DVD, choose IBBP as the GOP structure setting, and GOP size 15 for NTSC, or GOP size 12 for PAL. These selections will give the best results in most situations. See GOP Structure for more information. • IP: No B-frames are used with this setting. Choose IP only if your media contains fast motion that does not encode with sufficient quality using an IBBP or IBP structure. • 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. You can make the output file either a transport stream or a program stream. See About Elementary, Transport, and Program Streams for information on the differences between the different stream types. The audio in this stream is MPEG-1 Layer 2, with a sample rate of 44. 1 kHz or 48 kHz (depending on the source) and a bit rate of 384 kbps. To create an audio-only (MPEG-1/Layer 2 Audio) elementary stream, see Creating the MPEG-1 Audio for DVD Setting. Chapter 18 Creating MPEG-2 Output Files 205 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). [. . . ] • 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”). • Writes the output file, named MyOutput. mp4, to the ~/Movies folder. • Sets the command to time out after five seconds of looking for the cluster. Appendix C Using the Command Line 397 Submit a Job with a Password The following submits a job to a cluster identified by a name that does have a password. /Applications/Compressor. app/Contents/MacOS/Compressor -clustername MyCluster -password testpassword -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. • Sends this job to the cluster named MyCluster. [. . . ]