This beta feature has been removed. We decided to take a different approach. You will no longer see this behavior in beta builds.
We now provide an option to delete media cache files when upgrading a project created in an older version of Premiere Pro. This can fix stability and playback issues.
How it works:
- Launch the current version of Premiere Pro (22.5 at the time of this writing)
- Open a project created in the previous major version of Premiere Pro (version 15.x)
- You will be presented with the project upgrade dialog you are probably already familiar with
- The new “Clear media cache files . . .” option is checked by default
- Hit ok
- The entire media cache is cleared
- The old project is converted into a new project and that new project will be saved
- Premiere Pro will quit
- You need to manually relaunch the app and open the converted project
*Project files are compatible across the entire major version
- Project from 22.0 opens in 22.5 without need for conversion
- Project from 15.4 opened in 22.0 needs to be converted
Please take note:
- When the cache is cleared it will clear the ENTIRE media cache. If you are working on large projects this could take a little while to rebuild. You do not need to take any action for the media cache to be rebuilt. Premiere Pro will automatically generate the cache files as needed.
- Premiere Pro needs to quit and relaunch for the change to take effect.
- The option to clear media cache on project upgrade is only available when no other projects are open. If you already have projects open and attempt to open a legacy project, this option will be grayed out. To use this option, close all projects before running project conversion. Premiere Pro will close the application after using this option.
What are media cache files?
Media cache files are generated to help speed up loading and playback of media files. For example, audio waveforms are cached in peak files. When we import media into Premiere Pro we need to open the file and scan it to understand its contents. Details are then stored in the media cache so that next time you try to use this file the scan is not necessary. This means faster access to the file. Cache files will automatically be generated by Premiere Pro.
Learn more about media cache here: https://helpx.adobe.com/premiere-pro/kb/clear-cache.html
Why should I delete cache files?
Occasionally, we need to make slight changes to the structure of these cache files like when we add support for a new format. As a result, cache files generated in older versions of Premiere Pro can sometimes create conflicts in newer versions and cause playback issues like stuttering, dropped frames, the wrong frames getting played back or complete playback failure. Deleting the media cache is a well understood troubleshooting step by experts. This option during project upgrade will make the process easier for everyone.
For reference, you can find the cache files here:
- Mac: /Users/<username>/Library/Application Support/Adobe/Common
- Windows: \Users\<username>\AppData\Roaming\Adobe\Common
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