Free online 3GP to AU converter

3GP is a multimedia container format commonly used for mobile video and audio, while AU is an audio file format originally associated with Sun/NeXT systems and often used for simple, uncompressed or lightly compressed sound data. Converting 3GP to AU means extracting the audio track from a 3GP video file and saving it in AU format.

What is 3gp

3GP is a compact container designed for low-bandwidth devices and older mobile phones. It can store video, audio, and metadata, but for this conversion only the audio stream is needed.

What is au

AU is an audio format that supports basic sound storage and is recognized by some media tools and legacy systems. It is less common today, but still useful for compatibility in specific workflows.

How to convert 3gp to au

To convert 3GP to AU, open the 3GP file in a converter that can read video containers and export audio-only formats. Choose AU as the output format, then start the conversion. If the tool allows it, you can also select the audio codec and sample rate before exporting.

Best software for conversion

FFmpeg is the best choice for this conversion because it is fast, reliable, and supports both 3GP input and AU output. It is ideal for batch conversion and advanced control. A simple command example is:

ffmpeg -i input.3gp output.au

If you prefer a graphical interface, VLC media player and Audacity can also help with audio extraction, though FFmpeg remains the most flexible option.

Things to keep in mind

• 3GP files may contain video and audio, but AU output will include only the audio.
• AU may not preserve modern metadata or advanced compression features.
• For best compatibility, verify the sample rate and channel settings after conversion.

Summary

3GP to AU conversion is mainly an audio extraction task. Use FFmpeg for the most dependable results, especially when you need batch processing or precise format control.