M2TS to AU Converter

Extract Sun AU audio from Blu-ray M2TS video files

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Unix Audio Standard

AU is the native audio format for Sun/NeXT systems. Extract M2TS audio for Unix environments and Java applications.

Fast Extraction

Audio-only conversion bypasses video processing. AU files from M2TS are generated quickly on our servers.

Private Processing

M2TS uploads are deleted after conversion. AU outputs are automatically removed within 24 hours.

How to convert M2TS to AU

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose au or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your au file right afterwards

About formats

M2TS (MPEG-2 Transport Stream) is a container format used primarily for multiplexing audio, video, and other data on Blu-ray Disc media. The format is specified as part of the Blu-ray Disc Audio-Video (BDAV) standard developed by the Blu-ray Disc Association, with commercial Blu-ray products launching in 2006. M2TS files wrap content in MPEG-2 transport stream packets with an additional 4-byte timestamp header prepended to each 188-byte packet, resulting in 192-byte packets that enable more precise timing and error recovery during optical disc playback. This extended packet structure helps maintain synchronization when dealing with the variable read speeds inherent to disc-based media. M2TS supports the major Blu-ray video codecs including H.264/AVC, MPEG-2, and VC-1, alongside audio formats such as Dolby TrueHD, DTS-HD Master Audio, and LPCM for lossless surround sound. The container is also used by AVCHD camcorders for recording high-definition footage, making it common in both consumer disc playback and video production workflows. M2TS files preserve chapter markers, subtitle streams, and interactive menu data within the transport stream. Reliable synchronization mechanisms and support for high-quality codecs make M2TS well-suited for archiving high-definition content where preserving full source quality is essential.
Initial release: 2006
AU is an audio file format introduced by Sun Microsystems for its Unix workstations and the NeXT platform. It features a minimal 24-byte header specifying data offset, size, encoding type, sample rate, and channel count, followed by the audio payload. AU supports numerous encodings, including uncompressed linear PCM at various bit depths, mu-law and A-law companding (logarithmic compression used in telephone systems), and several ADPCM variants. This versatility made AU a workhorse across early Unix environments, web audio (Java applets defaulted to AU), and telephony applications. One advantage is simplicity: the compact header and straightforward structure make it trivial to parse, generate, and stream programmatically. The built-in mu-law option provides another benefit, delivering reasonable voice quality at just 8 KB per second — half the rate of 16-bit uncompressed audio — invaluable when storage and bandwidth were scarce. Although modern formats have largely supplanted AU in consumer applications, it retains a foothold in scientific computing and audio processing pipelines where minimal overhead and reliable cross-platform behavior are valued.
Developer: Sun Microsystems
Initial release: 1992

Frequently Asked Questions

Why convert M2TS to AU?

AU is the standard audio format for Sun and NeXT systems. It remains used in Unix environments and Java audio applications.

What plays AU files?

VLC, Audacity, SOX, and most Unix/Linux audio tools handle AU natively. Java applications also support AU as a default format.

Is AU similar to WAV?

Both store PCM audio. AU uses a simpler header and big-endian byte order, while WAV uses little-endian. Quality is comparable.

Does AU support compression?

AU can contain both uncompressed PCM and compressed formats like mu-law. Choose the encoding that fits your use case.

Can I batch-convert to AU?

Upload multiple M2TS files and extract AU audio from each in parallel — efficient for preparing Unix audio assets.