4.5

52Compressor User Guide
General properties
• Name: Displays the name of the setting.
• Description: Displays the description of the setting.
• Extension: Displays the extension of the output file.
• Allow job segmenting: If you’ve set up distributed processing, select this checkbox
to have Compressor process the output file using your shared computer group. See
Transcode batches with multiple computers using Compressor.
• Default location: Select an item from the pop-up menu to set the default save location
for transcoded files.
• Format: Use the pop-up menu to set the stream type for the output file. There are
three options:
• Program Stream: This stream type contains only one MPEG-2 content channel and
its associated audio. Program streams require an error-free delivery method and are
primarily used for storage or processing within a computer.
• Elementary Stream: This stream type contains only one MPEG-2 content channel
and no audio. When you select this option, you should also set the “Stream
usage” property.
• Transport Stream: This stream type can contain several MPEG-2 content channels
and associated audio. All the channels are multiplexed together, allowing the
receiver to choose which to play back. Compressor supports creating single-channel
transport streams that can also include associated audio. Transport streams can
also recover from interruptions during playback, making them ideally suited for
broadcast and streaming applications where noise or network congestion can lead
to interruptions.
• Stream usage: Use this pop-up menu to specify the MPEG-2 transcoding output.
Compressor modifies the available properties based on the option you choose:
• Generic: This option allows you complete access to all the MPEG-2 properties. This
is the only option that supports the MPEG-2 640 x 480 video format in addition to
the standard-definition (SD) and high-definition (HD) video formats. It’s also the
only option that supports creating transport and program streams. It supports the
complete bit rate range of 2.0 Mbps to 40.0 Mbps.
• DVD: This option restricts the encoding properties to those allowed by the SD DVD
specification. These include the NTSC and PAL video formats and a bit rate range of
2.0 Mbps to 9.0 Mbps.
• Blu-ray: This option restricts the encoding properties to those allowed by Blu-ray
video discs. These include the SD and HD video formats and a bit rate range of 10.0
Mbps to 40.0 Mbps.
• Add Apple metadata: Select this checkbox to have Compressor parse specific MPEG-2
authoring information during the transcoding process and provide it in the output file.
The resulting file will be read faster by other applications.
• Include chapter markers only: Select this checkbox to include chapter markers, but not
unnamed compression markers, in MPEG-2 output. When this checkbox is deselected,
all markers are included in the output file. See Add markers using Compressor.