Caching is used to improve performance while you’re using HitFilm.

RAM Preview is one form of caching, used to temporarily render a section of your timeline into memory for real-time playback. You can set the amount of your system RAM allocated to RAM previews here. Higher values will allow more frames to be previewed.

  • The Low button sets it to 25% of your total installed RAM.
  • The High button sets it to 75% of your total installed RAM.

You can also manually enter any value up to 100% of your installed RAM. However, setting the maximum above 75% could begin to negatively impact the RAM preview performance, since some RAM is also required for the operating system and running other software.

For full details on using RAM preview, see Introducing the Viewer.


HitFilm automatically stores background cache files of imported media, to improve media performance.

  • Database: Specifies the location of the cache database.
  • Cache: Specifies the location of the cache files.
  • Keep Unused Files: Old cache files will be automatically deleted after a specified number of days.
  • Usage: The Usage cannot be edited directly, but it provides an indication of how much space is being used by the cache.
  • Delete All Files: Removes all cache files immediately, regardless of how old they are.

HitFilm must be restarted before changes to the Cache settings will take effect.

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