avif-format

An AV1 Image (AVIF) file format plug-in for Adobe® Photoshop®.

Single images can be loaded and saved using 8, 10 or 12 bits-per-channel, image sequences and animations are not supported.

Monochrome images will be loaded using the Grayscale image mode. To save an image as monochrome the document must be using the Grayscale image mode (either 8-bit or 16-bit).

HDR files that use the Rec. 2100 PQ, Rec. 2100 HLG and SMPTE 428-1 transfer characteristics can be loaded and edited as 32-bits-per-channel documents.

32-bits-per-channel RGB documents can be saved as HDR AVIF files using the following transfer characteristics and bit-depths:

• Rec. 2100 PQ using either 10-bits-per-channel or 12-bits-per-channel.
• SMPTE 428-1 using 12-bits-per-channel.

32-bits-per-channel documents can also be saved as 10-bit or 12-bit SDR AVIF files using the None, clip transfer characteristic.

The support for HDR images with an alpha channel (transparency) may differ between applications. While this plug-in can load and save HDR images that include transparency, it may not be handled correctly by other applications. It is also possible that this plug-in may not correctly handle HDR images that include transparency from other applications.

This plug-in uses libheif with the AOM decoder and encoder.

The latest version can be downloaded from the Releases tab.

System Requirements

• Windows 7, 8, 10 or 11.
• A compatible 32-bit or 64-bit host application.

Installation

1. Close your host application.
2. Place Av1Image.8bi in the folder that your host application searches for file format plug-ins.
3. Restart your host application.
4. The plug-in will now be available as the AV1 Image item in the Open and Save dialogs.

Installation in Specific Hosts

Photoshop

Photoshop CC common install folder: C:\Program Files\Common Files\Adobe\Plug-ins\CC
Version-specific install folder: C:\Program Files\Adobe\Photoshop [version]\Plug-ins

Updating

Follow the installation instructions above and allow any existing files to be replaced.

License

This project is licensed under the terms of the GNU Lesser General Public License version 3.0.
See License.md for more information.

Source code

Prerequisites

• Visual Studio 2019
• The dependencies in the 3rd-party folder, see the read-me in that folder for more details.

Building the plug-in

• Open the solution in the vs folder
• Update the post build events to copy the build output to the file formats folder of your host application
• Build the solution

 Adobe and Photoshop are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and/or other countries.
 Windows is a registered trademark of Microsoft Corporation in the United States and other countries.   
 All other trademarks are the property of their respective owners.