.ARI File Extension

An ARI file is a still frame image recorded by an ARRI digital video camera, such as ALEXA MINI and AMIRA. It stores uncompressed image data in the ARRIRAW format exactly how the sensor on the camera captured it. ARI files are single still frames from a sequence of images that comprise a recorded video.

You can open an ARI file with several applications. ARRIRAW Converter can view ARI files and convert them to other formats. You can also open ARI files with Microsoft Photos (with the RAW Image extension) and various third-party applications with the ARRI SDK.

An ARI file may also be a compressed archive created by ARI, an archive utility for DOS. It contains one or more compressed files. Compressing files into an ARI file allows users to store and share those files more efficiently.

ARI was an archiving utility developed by RAO. It was available in both free and paid versions, with the paid version including extra features.

The utility compressed files using arithmetic coding, producing ARI archives. ARI users could combine this compression method with other compression algorithms, including LZP, DC, BWT, and PPM, to further compress their files.

You can open an ARI file with ARI. Because ARI is available only for DOS, you may have to run it in an MS-DOS emulator, such as DOSbox.