M2TS to HCOM Converter

Turn M2TS Blu-ray audio into Macintosh HCOM format online

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Vintage Mac Format

Bring Blu-ray M2TS audio into the classic Macintosh ecosystem. HCOM files play on vintage Mac hardware and software from the era.

HD to Classic

Bridge the gap between modern Blu-ray M2TS content and retro Macintosh computing — extract and encode audio in a single online step.

Runs on Our Servers

No vintage Mac or audio extraction tools needed. Our cloud handles M2TS processing and HCOM encoding — just upload and download.

How to convert M2TS to HCOM

1

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

2

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

3

Let the file convert and you can download your hcom 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
HCOM is a Huffman-coded audio format from the early Macintosh era, designed to shrink digitized sound for distribution on floppy disks and bulletin board systems when storage was precious and modems were slow. The encoder takes 8-bit unsigned PCM input, computes a frequency table of sample-delta values, and builds an optimal Huffman tree that replaces common deltas with short bit sequences. Compression ratios of 2:1 or better were typical for speech recordings, a meaningful saving when a 3.5-inch floppy held only 800 KB. Files were distributed as Macintosh resource forks and played through utilities like SoundApp and the BinHex ecosystem that defined Mac software exchange in the late 1980s. The format supported sample rates up to 22.255 kHz, matching the output capabilities of original Macintosh sound hardware. Tools such as SoX retain HCOM decoding support, ensuring that archived recordings remain accessible decades later. HCOM holds three practical advantages for preservation work: lossless compression that recovers the original samples exactly, a self-contained Huffman table embedded in each file for dependency-free decoding, and historical prevalence across thousands of vintage Mac sound archives.
Developer: Apple Computer
Initial release: 1985

Frequently Asked Questions

Why convert M2TS to HCOM?

HCOM is a classic Macintosh audio format with Huffman compression. Converting M2TS audio to HCOM serves vintage Mac computing and archiving.

What programs handle HCOM?

Classic Mac sound utilities read HCOM natively. SOX supports HCOM on modern systems for processing and conversion purposes.

Is HCOM compression lossless?

HCOM applies Huffman coding to FSSD data — this is lossless compression. Audio quality is preserved within the 8-bit base format limitations.

Does M2TS have high-quality audio?

M2TS files from Blu-ray often carry high-resolution surround sound. Audio is adapted to HCOM specifications during the conversion process.

Can I batch-convert M2TS files?

Yes — upload multiple M2TS files and convert them all to HCOM simultaneously. Useful for archiving Blu-ray audio for vintage systems.