Video to AU Converter

How to Extract AU Audio from Video

1. Upload Your Video: Click "+ Add Files" to select video files from your computer, Google Drive, or Dropbox. Supports 35+ formats: MP4, MOV, AVI, MKV, WebM, and more.
2. Choose Settings: Select audio codec, compression method (quality preset, target file size, or bitrate), sample rate, and channel configuration (stereo/mono). Optionally trim with start time and duration.
3. Convert and Download: Click "Convert" and download your AU audio files.

What Is AU?

AU is a simple audio format created by Sun Microsystems for Unix systems. It uses μ-law or A-law compression (telephony codecs) or uncompressed PCM.

Why Extract AU from Video?

Legacy Unix/Solaris Systems

AU is the native audio format for Unix and Solaris. Some legacy systems and scripts expect AU input.

Java Audio Applications

Java's javax.sound API has native AU support. Extract audio as AU for Java-based audio applications.

Telephony Systems

AU's μ-law encoding is the standard for telephony. Extract audio for VoIP and phone system integration.

Competitors offer general video-to-audio extraction but few specifically target AU format. Most tools like freevideotoaudio.com and restream.io focus on MP3, WAV, AAC, and OGG output. XConvert is one of the few with dedicated AU output including codec selection, sample rate control, and channel configuration.

Frequently Asked Questions

Is it free?

Yes. Completely free with no sign-up required and no file count limits.

Should I extract AU or WAV?

WAV for modern audio editing. AU only if your specific system (Unix, Java, telephony) requires it.

Can I extract from multiple videos at once?

Yes. Upload multiple video files and extract AU audio from all of them.

Does it work on mobile?

Yes. Works in any modern browser on all devices — no app installation required.