AV1 Video Extension (Beta) for Windows

Overview

AV1 Video Extension is a free utility from Microsoft that adds AV1 decoding support to Windows media apps. Once installed, it provides the AV1 codec so native players like Movies & TV and Windows Media Player can open AV1-encoded files without requiring a separate third-party player.

Why AV1 is useful

AV1 (AOMedia Video 1) is an open, royalty-free codec designed for efficient streaming and storage. Compared with older formats such as H.264, HEVC, VP8, and VP9, AV1 can deliver comparable or better image quality at smaller file sizes and with lower bandwidth needs, making it attractive for internet video distribution.

How to install and use

• Click the download button for the extension and follow the on-screen prompts.
• The extension will automatically fetch and install the AV1 codec for you; typically no extra configuration is required.
• After installation, try opening an AV1 file with the built-in Movies & TV app or Windows Media Player. A system restart may be necessary for the codec to become active.

System requirements and compatibility

• Requires Windows 10 build 17763.0 or later; older Windows versions are not supported.
• Designed to work with the native Microsoft video apps; functionality in third-party players may vary.
• The extension is currently in beta, so some playback glitches or performance inconsistencies can occur.

Benefits

• Lets you keep using the native Windows media apps to play AV1 files.
• Automatically installs the necessary codec without manual downloads.
• Free to use and maintained through Microsoft’s distribution channel.

Limitations and alternatives

• Beta status means occasional playback problems or instability.
• Only available on Windows 10 (build 17763.0+) and later.
• If your system is not supported or you prefer a different solution, consider:
• Installing a codec suite such as K-Lite Codec Pack.
• Converting AV1 files to another format with a video transcoder like HD Video Converter Factory Pro.
• Using third-party media players that include AV1 support out of the box.

Recommendation

If you run a supported version of Windows 10 and want native player support for AV1, this extension is a convenient, no-cost option to try. Keep in mind it is still experimental, so expect occasional issues; if stability or broader compatibility is required, look into the suggested alternatives.