When a 4K timeline stutters during playback, the culprit is often not a lack of raw power, but rather source codecs that are too heavy to decode in real time. Blackmagic Design's Proxy Generator addresses this exact issue by monitoring folders and automatically creating lightweight proxy versions for every clip. This article explores the Lite and full versions, how to select codecs and proxy resolutions for 3840 × 2160 frames, the differences between Proxy Media, Optimized Media, and Render Cache, and how to relink files when a clip shows as Offline.
How Blackmagic Proxy Generator runs in the background, separate from DaVinci Resolve
According to Chapter 8 of the DaVinci Resolve 20 manual, Blackmagic Proxy Generator is a standalone, lightweight program designed to run in the background while you transfer data from memory cards. The application monitors watch folders, detects new files, and automatically transcodes them into proxies without any further input. This frees up DaVinci Resolve for editing and color grading, while the proxy creation process runs simultaneously in a separate window.
By definition, a proxy is a more heavily compressed version of the original file, potentially at a lower resolution, linked to the original via metadata. You edit using the proxies to ensure smooth timeline playback and stable performance, then switch back to the original camera files for color grading, finishing, and exporting. Because proxy files are independent and portable, a project can be moved between multiple laptops or sent over the internet with a much smaller proxy set compared to the original data.
The Generate Proxy Media command within the Media Pool also creates proxies, but it only processes clips that have already been imported into the active project, displaying a progress bar and estimated time within Resolve itself. Proxy Generator is better suited for multi-day shoots where folders are constantly receiving new files. For a few isolated clips causing lag, the Media Pool command is the faster option since it requires no additional software. Conversely, if an external drive receives new data every session, letting Proxy Generator run throughout the session ensures you don't have to manually track which clips have proxies and which do not.
The free Lite version included with Resolve versus the full Studio version
The DaVinci Resolve 18 release notes from July 20, 2022, on the Blackmagic support site clarify the two naming conventions. The free version includes the DaVinci Proxy Generator Lite app, while DaVinci Resolve Studio includes the DaVinci Proxy Generator app. On the DaVinci Resolve collaboration features page, the company describes the tool as a free addition to Resolve that allows you to select size, choose H.264, H.265, or ProRes formats, and specify one or more watch folders.
Blackmagic does not publish a detailed feature comparison between the two applications, so practical limitations should be viewed through the lens of each Resolve version's capabilities. The Studio comparison page notes that the free version supports editing and finishing up to 60 fps at Ultra HD 3840 × 2160 resolution. DaVinci Resolve Studio supports up to 120 fps at 32K, multiple GPUs, and hardware acceleration for H.264 and H.265 decoding and encoding.
The list of formats Blackmagic announced for Resolve 19.1 also shows that on Windows 10, the free version only handles H.264 and H.265 in the 8-bit profiles supported by the OS, while the Studio version adds more profiles and GPU acceleration. If you are deciding whether to stick with the free version of Resolve or upgrade to the paid editor, the article DaVinci Resolve and Adobe Premiere: Is the free version enough to replace it? analyzes the feature scope of each option.
Choosing proxy codecs and resolutions for 3840 × 2160 frames
In Project Settings, under the Optimized Media and Render Cache section of Master Settings, there are two settings for the Generate Proxy Media command. Proxy Media Resolution offers options for Original, Half, Quarter, Eighth, Sixteenth, or Choose Automatically; the latter option only reduces the resolution for files larger than the timeline. According to the conversion table in the Resolve 20 manual, a UHD 3840 × 2160 frame is halved to 1920 × 1080, quartered to 960 × 540, and reduced to an eighth at 480 × 270.
| Proxy resolution level | Frame size (pixels) | Total pixels (millions) | Ratio to original file |
|---|---|---|---|
| Original (native UHD) | 3840 × 2160 | 8.29 | 100% |
| Half (1/2) | 1920 × 1080 | 2.07 | 25% |
| Quarter (1/4) | 960 × 540 | 0.52 | 6.25% |
| Eighth (1/8) | 480 × 270 | 0.13 | 1.56% |
The total pixel counts in the table are calculated from the two dimensions of the frame: 3840 × 2160 equals 8,294,400 pixels, while the Half setting results in 2,073,600 pixels, or 25%, and the Quarter setting is only 518,400. Because each step down involves halving both the width and the height, the pixel count the processor needs to decode drops fourfold, which makes a significant difference for a laptop's CPU. For 4K editing laptops, the Half setting usually provides enough clarity for framing and reading facial expressions, while Quarter is suitable for rough cuts or sending proxy sets over a network. The Eighth setting should only be used when bandwidth or storage is extremely limited.
The Proxy Media Format determines the codec. The manual lists various ProRes and DNxHR types alongside H.264 and H.265, suggesting ProRes 422 HQ or DNxHR HQX when you want to optimize quality from RAW sources, and ProRes Proxy, H.264, or H.265 when you need small files for transmission. On Windows 10, the Resolve 19.1 format list only specifies ProRes decoding without encoding, so Windows laptops typically opt for H.264, H.265, or DNxHR HQ, SQ, or LB. In Proxy Generator, the codec is selected via the Proxy Media Format dropdown directly on the application interface.
Setting up watch folders and monitoring proxy processing status
To add a watch folder, click Add in Proxy Generator, create a new folder or select an existing one, and then click Open. There is no limit to the number of watch folders you can use; you can organize them by memory card, scene, or shoot date. Proxies are created in a subfolder named Proxy located at the same level as the original file. Note that you must not name your watch folder "proxy," as that name is reserved for the application itself.
The Watch Folders pane displays three columns: Volume, Folder, and Status, along with the estimated storage required for the proxies. The Status column switches to Waiting when there are clips in the queue, Processing (showing the current clip number out of the total) while working, and finally Completed once finished. Click Start to begin, Stop to pause, or press the spacebar. The Processing pane shows the name of the clip currently being processed, the export speed in fps, and the remaining time. Once Proxy Generator reports Completed for all folders, you can import the clips into Resolve and start editing immediately.
The only requirement is that the drive containing the watch folders must have enough space for both the original files and the new proxies. Users working with 4K footage should ensure they have ample free space before each shoot, as the capacity displayed by Windows is always lower than the number printed on the box, as explained in this article: 1TB Laptop SSD: Why it only shows 931GB and who should buy one. When processing is stopped, the Delete Proxies and Extract Proxies commands become available to clean up or extract the proxy files.
How Proxy Media differs from Optimized Media and Render Cache
Resolve features four different playback acceleration mechanisms that are often confused. Optimized Media essentially creates lighter versions of source files, but these are managed internally by Resolve in the .dvcc format and cannot be exported. Render Cache is used for clips already on the timeline that have heavy effects applied, such as Resolve FX, noise reduction, or Fusion. Timeline Proxy Mode (called Proxy Mode before version 17) simply lowers the timeline resolution temporarily without writing any new files.
| Mechanism | Creates files on drive | Transferable to other laptops | Best use case |
|---|---|---|---|
| Proxy Media | Yes, independent files | Yes, relink after moving | When you need smooth playback for all sources and need to share with collaborators |
| Optimized Media | Yes, internal .dvcc format | No, cannot be exported | When you need smooth playback and only edit on a single laptop |
| Render Cache | Yes, project-specific | No, only for the project that created it | For slow-playing clips with heavy effects |
| Timeline Proxy Mode | No, temporary resolution reduction | Not applicable | When the timeline is only slightly slower than real-time |
Optimized Media uses codecs ranging from ProRes Proxy to 4444 XQ, DNxHR LB to 444, or even uncompressed formats, and it is stored in the project's cache folder. Any changes to camera RAW settings will invalidate the existing optimized media. You can toggle this via Playback > Use Optimized Media if Available. For a single-laptop workflow, Optimized Media is a convenient option, but if you need to send proxies to a collaborator, you must use the Proxy Media created by Proxy Generator.
Render Cache has two modes. Smart automatically caches H.264, H.265, DCP, JPEG2K, and camera RAW clips on the timeline, as well as speed effects and Fusion, including nodes using Motion Blur or Noise Reduction. User mode allows you to cache only the specific parts you mark. If your drive fills up, go to Playback > Delete Render Cache and choose All, Unused, or Selected Clips. The "Delete cache older than" option in Preferences can automatically clean up old cache files, as detailed in this DaVinci Resolve 20 reference guide.
Switching proxy modes and relinking when clips show Offline
In the Edit page, the Playback > Proxy Handling menu offers three options. Prefer Proxies plays using the proxies, while clips without proxies will automatically use the original files. Prefer Camera Originals prioritizes the original files and only uses proxies when the originals are missing. Disable All Proxies turns off proxies entirely; if the original files are missing, they will appear as Media Offline. A purple bar on the timeline indicates a segment where the original file is missing. In the Cut page, the Proxy Handling button is located in the top right corner of the Viewer. Before color grading, you should activate Prefer Camera Originals or Disable All Proxies to verify colors on the original files.
To verify your setup, open the List view in the Media Pool and enable the Proxy and Proxy Media Path columns. The Proxy column will show None if no proxy exists, Offline if a proxy was created but cannot be found at the specified path, or the resolution if the proxy is Online. Proxies from a watch folder are automatically linked when you import the original files from that same folder into the Media Pool, so do not rename the Proxy folder after creation. Maintaining the structure generated by Proxy Generator is the simplest way to avoid Offline errors.
If proxies are moved to a different drive, select the clip, right-click, and choose Link Proxy Media, then point it to the new file or folder. Proxies created in a different application must have matching timecode, matching filenames (excluding the extension), matching frame rates, and use a codec supported by Resolve. The 21.0.4 update on August 5, 2026 added the ability to relink proxies with different formats. Unlink Proxy Media only breaks the link; the files remain on the drive, so you should manually clean them up after each project to prevent your SSD from filling up.
Frequently Asked Questions (FAQ)
Is Proxy Generator a separate download?
No. Blackmagic Design describes Proxy Generator as a free tool included with DaVinci Resolve: the Lite version comes with the free Resolve, and the full version comes with Resolve Studio. You should only download the Resolve installer from the manufacturer's official website; avoid repackaged files on third-party sites, as they may bundle unwanted software or outdated versions.
Does editing with proxies reduce the quality of the final export?
By default, the Deliver page always reverts to the original files to export at the highest quality. Resolve will only export from proxies if you check the Use proxy media box in Advanced Settings, which is useful for creating quick previews for clients, sending files to sound editors, or when you only have the proxy files available without the originals.
How do I delete old proxies to reclaim disk space?
Unlinking Proxy Media does not delete the files; you must delete them using your operating system's file manager. For proxies created by the watch folder application, stop the processing and then use the Delete Proxies command to remove the entire Proxy folder associated with the selected watch folder.
Can Optimized Media and Render Cache replace proxies?
Only in certain situations. Optimized Media is ideal when you are editing on a single laptop and do not need to share the files. Render Cache handles clips with heavy effects on the timeline. If you need to move a project to another location or send it to a collaborator, independent proxies remain the best choice.
