Audio export settings – Adobe Premiere Pro CS3 User Manual
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ADOBE PREMIERE PRO CS3
User Guide
422
Fields
Choose an option if required for your final medium. Lower Field First is the default. No Fields is the equiv-
alent of progressive scan, which is the correct setting for computer display and motion picture film. Choose Upper
Field First or Lower Field First when exporting video for an interlaced medium, such as NTSC, PAL, or SECAM.
The option you should choose depends on the specific video hardware you use.
Deinterlace Video Footage
Select this option if the video content in the sequence is interlaced and you are exporting
to a noninterlaced medium, such as motion picture film or progressive scan video. Deinterlacing can also make it
easier to apply high-quality effects in another program, such as Adobe After Effects. If the sequence content does
not have fields, don’t select this option; instead select No Fields from the Fields option.
Optimize Stills
Select this option to use still images efficiently in exported video files. For example, if a still image
has a duration of 2 seconds in a project set to 30 fps, Adobe Premiere Pro creates one 2-second frame instead of 60
frames at 1/30 of a second each. Selecting this option can save disk space if you used still images. Deselect this option
only if the exported video file exhibits playback problems when displaying the still images.
Keyframe Every _ Frames
Select and type the number of frames after which the codec will create a keyframe when
exporting video.
Add Keyframes at Markers
Select this option to create keyframes only where markers exist in the Timeline window.
For this to work, markers must exist in the Timeline window (see “
Add Keyframes at Edits
Select this option to create a keyframe at edit points in the Timeline window.
Note: Some codecs do not provide control over keyframes. In such codecs, the above options will not be available.
Audio export settings
The following options are available in the Audio panel of the Export Movie Settings dialog box and the Export
Audio Settings dialog box:
Compressor
Specify the codec for Adobe Premiere Pro to apply when compressing audio. The codecs available
depend on the File Type you specified in the General panel in the Export Movie Settings or Export Audio Settings
dialog box. Some file types and capture cards support only uncompressed audio, which has the highest quality, but
uses more disk space. Check with your capture card’s documentation before choosing an audio codec.
Advanced Settings
Click to access codec-specific options. This option is not available for all codecs. Consult the
codec’s documentation or its developer’s website for more guidance on choosing advanced settings.
Sample Rate
Choose a higher rate to increase the frequency at which audio is converted into a discrete digital value,
or sampled. Higher sample rates increase audio quality and file size; lower sample rates decrease quality and file size.
However, setting the sample rate higher than the audio’s sample rate at the time of recording will not increase
quality. Setting a different rate than the source files’ audio, or resampling, requires additional processing time. You
can avoid resampling by capturing audio at the same rate at which you want to export it.
Sample Type
Choose a higher bit depth to increase accuracy of audio samples, which can improve dynamic range
and reduce distortion, especially if the audio undergoes additional processing, such as filtering or resampling.
Higher bit depths also increase processing time and file size; lower bit rates reduce processing time and file size.
However, setting the bit depth higher than the audio’s bit depth at the time of recording will not increase quality.
Channels
Specify how many audio channels are in the exported file (see “
page 183). If you choose fewer channels than are in the sequence’s master track, the audio will be downmixed (see
“
About audio tracks in a sequence
Interleave
Specify how often audio information is inserted among the video frames in the exported file. See your
capture card documentation for the recommended setting. A value of 1 frame means that when a frame is played
back, the audio for the duration of that frame is loaded into RAM so that it can play until the next frame appears. If
April 1, 2008