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How Does a Proxy Work?

A proxy is a smaller, lower-resolution copy of your original video. You edit with the proxy file because it is easier for the computer to play and process, while the original high-quality file stays linked in the background. When you export the project, the editor uses the original media for the final result.

How to Create and Use a Proxy in Filmora

In Filmora, you can create proxy files for large or high-resolution videos to make editing smoother. Once you create a proxy, Filmora uses it during timeline playback and editing but keeps the original file for final export. This is especially useful for 4K footage or projects that feel slow or choppy during editing.

How to Enable Automatic Proxy Creation

Step 1. Access the Performance Tab

Create a new project in Filmora, click File > Preferences, and open the Performance tab.

Go to Filmora Preferences

Step 2. Enable the Proxy Option

Scroll down to the Proxy section and check the box for Automatically Create Proxies When Media Resolution is Higher than:

Enable the proxy option

Step 3. Choose a Resolution and Apply the Setting

Choose the target resolution threshold, such as 4K or 1080p, then click Apply so Filmora automatically builds smaller, smoother copies for high-resolution clips.

Select the Apply button

How to Create Proxies Manually

Step 1. Choose the Create Proxies Option

Import your high-resolution footage into the Media Library, then right-click the video clip and choose Create Proxy File.

Click Create Proxy File

Step 2. Locate the Proxy Indicator

Look for the small indicator icon on the clip thumbnail once processing finishes.