Move or clean the media cache database – Adobe Premiere Pro CS6 User Manual
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does not support capturing audio separate from video.) Set the locations for new files by choosing Edit > Preferences > Scratch Disks
(Windows) or Premiere Pro > Preferences > Scratch Disks (Mac OS). If you don’t change the defaults, all files captured or created by
Premiere Pro are stored in the same folder in which it stores the project files.
Online resources for improving system performance
advice from experienced users on setting up disks for a video editing system.
For a collection of videos and articles about making Premiere Pro work faster can be found
learn about hard disk setup for optimum performance in Adobe Premiere Pro and After Effects.
To learn how to format a disk as NTFS on Windows,
To learn how to format a disk as HFS+ on Mac OS,
. The information on this page is valid for Mac OS
X 10.4-10.7
Move or clean the Media Cache Database
When Premiere Pro imports video and audio in some formats, it processes and caches versions of these items that it can readily access when
generating previews. Imported audio files are each conformed to a new .cfa file, and MPEG files are indexed to a new .mpgindex file. The media
cache greatly improves performance for previews, because the video and audio items do not need to be reprocessed for each preview.
Note: When you first import a file, you may experience a delay while the media is being processed and cached.
A database retains links to each of the cached media files. This media cache database is shared with Adobe Media Encoder, After Effects,
Premiere Pro, Encore, and Soundbooth, so each of these applications can each read from and write to the same set of cached media files. If you
change the location of the database from within any of these applications, the location is updated for the other applications, too. Each application
can use its own cache folder, but the same database keeps track of them.
Choose Edit > Preferences > Media (Windows) or Premiere Pro > Preferences > Media (Mac OS), and do one of the following:
To move the media cache or the media cache database, click the respective Browse, button.
To remove conformed and indexed files from the cache and to remove their entries from the database, click Clean. This command only
removes files associated with footage items for which the source file is no longer available.
Important: Before clicking the Clean button, make sure that any storage devices that contain your currently used source media are
connected to your computer. If footage is determined to be missing because the storage device on which it is located is not connected, the
associated files in the media cache is removed. This removal results in the need to reconform or reindex the footage when you attempt to
use the footage later.
Cleaning the database and cache with the Clean button does not remove files that are associated with footage items for which the source files
are still available. To manually remove conformed files and index files, navigate to the media cache folder and delete the files.
Optimize rendering for available memory
By default, Premiere Pro renders video using the maximum number of available processors, up to 16. However, some sequences, such as those
containing high-resolution source video or still images, require large amounts of memory for the simultaneous rendering of multiple frames. These
sequences can force Premiere Pro to cancel rendering and to give a Low Memory Warning alert. In these cases, you can maximize the available
memory by changing the rendering optimization preference from Performance to Memory. Change this preference back to Performance when
rendering no longer requires memory optimization.
1. Select Edit > Preferences, and select Memory in the Preferences dialog box.
2. In the drop-down list next to Optimize Rendering For, select Memory.
3. Click OK, close Premiere Pro, and reopen the project for the new preference to take effect.
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