Convert h266 to au

Download and install the latest version of Filestar.
Right click on one or more H266 file(s) on your desktop and select Convert with Filestar.
Type convert to au in the search box.
Press Convert.

What is the difference between .h266 and .au?

Name: H.266 VVC Video Stream; Audacity Audio File
Extension: .h266; .au
Format: Binary; Binary
Category: Video; Audio
Developer: Audacity
Description: Audio file created by Audacity, a free, cross platform audio editor; uses a proprietary format that can only be opened by Audacity; saved as one of multiple audio data files for an Audacity project (.AUD).
MIME Type: video/x-h266; audio/basic
Sample: sample.h266; sample.au
Wikipedia: .au on Wikipedia

Last updated October 3, 2026