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Adobe Premiere Pro Help
Working with Projects
Using Help
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Contents
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56
Using scratch disks
When you edit a project, Adobe Premiere Pro uses disk space to store files required by
your project, such as captured video and audio, conformed audio, and preview files that
you create manually or that are created automatically when exporting to certain formats.
Adobe Premiere Pro uses conformed audio files and preview files to optimize perfor-
mance, allowing real-time editing, 32-bit floating-point quality, and efficient output.
All scratch disk files are preserved across work sessions. If you delete preview files or
conformed audio files, Adobe Premiere Pro automatically recreates them.
By default, scratch files are stored where you save the project. The scratch disk space
required increases as sequences become longer or more complex. If your system has
access to multiple disks, you can use the Edit > Preferences > Scratch Disks command to
specify which disks Adobe Premiere Pro uses for these files. This is best done before you
begin a project.
Types of scratch disks
While performance can be enhanced by setting each scratch disk type to a different disk,
you can also specify folders on the same disk. The following scratch disk options are
available in the Edit > Preferences > Scratch Disks command:
Captured Video
Folder or disk where Adobe Premiere Pro stores video files that you
capture using the Capture window.
Captured Audio
Folder or disk where Adobe Premiere Pro stores audio files that you
capture using the Capture window.
Video Previews
Files created when you use the Sequence > Render Work Area
command, export to a movie file, or export to a DV device. If the previewed area includes
effects, the effects are rendered at full quality in the preview file.
Audio Previews
Files created when you use the Sequence > Render Work Area
command, use the Clip > Audio Options > Render and Replace command, export to a
movie file, or export to a DV device. If the previewed area includes effects, the effects are
rendered at full quality in the preview file.
Conformed Audio
Imported audio converted to Adobe Premiere Pro specifications for
consistent high-quality playback as you edit. (See
“Conforming audio” on page 192
.)
Maximizing scratch disk performance
If your computer has only one hard disk, consider leaving all scratch disk options at their
default settings. For maximum performance, follow these guidelines:
•
Set up scratch disks on one or more separate hard disks. In Adobe Premiere Pro, it’s
possible to set up each type of scratch disk to its own disk (for example, one disk for
captured video and another for captured audio).
•
Specify your fastest hard disks for capturing media and storing scratch files. You can use
a slower disk for audio preview files and the project file.
•
Specify only disks attached to your computer. A hard disk located on a network is
usually too slow. Avoid using removable media because Adobe Premiere Pro always
requires access to scratch disk files. Scratch disk files are preserved for each project,
even when you close the project. They are reused when you reopen the project
