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Specifies the number of B frames (Bi-directional frames) between consecutive I frames (Intra-frames) and
M frames
P frames (Predicted frames).
Specifies the number of frames between I frames (Intra-frames). This value must be a multiple of the M
N frames
frames value.
Specifies the frequency of each Closed Group of Pictures (Closed GOP), which cannot reference
Closed GOP Every
frames outside of the closed GOP. A GOP consists of a sequence of I, B, and P frames. (This option is available if you
choose MPEG-1 or MPEG-2 as the format.)
Automatic GOP Placement
option is available if you choose MPEG-1 as the format.)
Note: MPEG-1 and MPEG-2 formats include numerous advanced options not listed here. In most cases, selecting a
format or preset designed for your target output sets the appropriate options automatically. For detailed information on
options not listed, consult the specifications for the MPEG-1 (ISO/IEC 11172) and MPEG-2 (ISO/IEC 13818) formats.
Audio options for encoding
In the Export Settings dialog box, the options available in the Audio tab depend on the format you've specified. Some
common audio options include the following:
Specifies the codec used to encode the audio:
Codec
•
AAC (Advanced Audio Coding)
the default for the H.264 format.
•
SurCode for Dolby Digital 5.1
most common encoder for DVD-video. (This codec is available only in Adobe Premiere Pro.)
•
MainConcept MPEG Audio
with Adobe Premiere Pro, After Effects, and Soundbooth.
•
PCM (pulse-code modulation) Audio
other formats.
Determines the audio type.
Audio Format
Specifies the output bit rate of the audio. Generally, higher bit rates increase both quality and file size. This
Bit Rate
option is available for Dolby® Digital, MainConcept MPEG, and some Windows Media audio codecs.
Note: Options not documented here are specific to the selected format. For detailed information, consult the specifica-
tions for the selected format.
Audiences options for encoding
In the Export Settings dialog box, specifying a streaming media codec in RealMedia or Windows Media formats
enables Audiences options, which allow you to output variations of a movie suited to different network speeds. The
player software associated with the format detects and selects the most appropriate version to ensure smooth
playback. For example, Windows Media includes Audiences such as Dial-up Modems (56 Kbps) and Broadband Or
Cable Modem/DSL (384 Kbps).
Note: Some codec-specific settings are not documented here. For more detailed information regarding a particular codec,
check the documentation provided by its developer.
Add Audiences
In the Save As dialog box, choose a format that supports streaming media (RealMedia or Windows Media).
1
When selected, sets the placement of Group of Pictures (GOP) automatically. (This
A high-quality encoding format supported by many mobile devices. This codec is
A high-quality encoding format developed for multichannel digital sound and the
A high-quality encoder developed by MainConcept media technologies, and included
A lossless audio format. Files of this format tend to be larger than files of the
SOUNDBOOTH CS3
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User Guide
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