Cache in video editing programs is a system that stores temporary data to help speed up the editing process. When you work on a video project, your editing software generates and uses a lot of temporary files, and the cache helps manage these files efficiently.
How Cache Works
When you edit a video, your software processes the raw footage and effects in real-time. This can be very resource-intensive, so to make things smoother, the software caches or temporarily stores processed versions of your clips, effects, and transitions. This way, the next time you play or edit that part of your project, the software can quickly access the cached data instead of reprocessing everything from scratch.
Where Cache Is Stored
The cache is typically stored on your computer’s hard drive or SSD. You can usually specify the location in your software’s settings, which is handy if you want to use a fast SSD for better performance.
Cache Formats
Cache files can come in various formats, depending on the software and the type of data being cached. Common formats include:
- .cache files for general temporary data.
- .render files for pre-rendered video segments.
- .conform files for conformed media.
- .peak files for audio waveforms.
Storage Space
The amount of space cache files take up can vary greatly depending on the size and complexity of your projects. Larger projects with high-resolution footage and lots of effects will generate more cache data. It’s not uncommon for cache files to take up several gigabytes of space.
Example: Cache in DaVinci Resolve
How It Works
DaVinci Resolve uses cache to store optimized media and render files. When you apply effects, transitions, or color grades, Resolve can cache these changes so you can play back and edit your footage smoothly.
Storage Location
You can set the cache location in the Project Settings under “Master Settings” -> “Working Folders” -> “Cache files location.”
Formats
Resolve typically uses .cache and .render files. It also generates .gallery files for stills and other references.
Space Usage
Cache files in Resolve can grow quickly, especially with high-resolution projects. It’s a good idea to manage and clear your cache regularly to free up space.
Example: Cache in Adobe After Effects
How It Works
Adobe After Effects uses a similar system where it caches RAM previews and disk caches to speed up the playback and rendering of compositions.
Storage Location
You can set the disk cache location in the “Preferences” -> “Media & Disk Cache” settings. Here, you can also see how much space the cache is using and clear it if necessary.
Formats
After Effects uses .cfa (conformed audio), .pek (peak), and .aep (project) files for caching.
Space Usage
After Effects’ cache can also take up a lot of space, particularly with complex compositions and high-resolution assets. Regularly clearing your cache can help maintain performance and free up disk space.
Conclusion
Cache is a crucial part of video editing software, designed to enhance performance and streamline the editing process. By understanding how cache works and managing it effectively, you can ensure a smoother and more efficient workflow in your video projects.
