M2TS to AIFF Converter

M2TS to AIFF Converter

An M2TS file is the BDAV transport stream that AVCHD camcorders and Blu-ray discs record — H.264 video wrapped together with a Dolby Digital (AC-3) or LPCM soundtrack. This converter discards the HD video, decodes that soundtrack, and writes it as an uncompressed AIFF file: the big-endian PCM format Logic Pro, Final Cut, GarageBand, and Pro Tools read natively on macOS. Use it when you want only the audio from a camcorder or Blu-ray clip, ready to drop onto a track without a decode pass.

M2TS Format at a Glance

AIFF Format at a Glance

How to Convert M2TS to AIFF

1. Upload Your M2TS File: Drag and drop your .m2ts clip onto the page, or click "+ Add Files" to browse. Several clips can be queued and processed with the same settings.
2. Set Audio Channel: Leave Audio Channel on Original to keep the source layout, choose Stereo to fold a 5.1 surround track down to two channels, or Mono to halve the output size for voice-only recordings.
3. Set Audio Sample Rate (Optional): Leave Audio Sample Rate on Original — AVCHD and Blu-ray audio is 48 kHz — unless you specifically need 44.1 kHz for CD mastering. The Audio Codec stays on PCM 16-bit Big Endian, the standard AIFF flavor.
4. Convert and Download: Click Convert and download your AIFF. No sign-up, no watermark.

Frequently Asked Questions

What audio codec does an M2TS file actually contain?

AVCHD camcorders record audio as either Dolby Digital (AC-3) or uncompressed Linear PCM, and Blu-ray streams add DTS to that list. AC-3 is the common choice on consumer camcorders, running roughly 64 to 640 kbit/s across 1 to 5.1 channels; LPCM appears on some professional bodies and runs around 1.5 Mbit/s for stereo. Whichever the source uses, this converter decodes it to PCM and wraps it in an AIFF file as 16-bit big-endian samples.

Does converting M2TS to AIFF improve the audio quality?

No. AIFF is an uncompressed container, but it can only hold whatever the source already carried. If your M2TS audio is Dolby AC-3 — the default on most consumer AVCHD clips — decoding it to AIFF PCM gives you a much larger file with a faithful, lossless copy of an already-lossy signal; it cannot restore frequencies AC-3 discarded at capture. If the source is LPCM, extracting to AIFF is a lossless transcode of audio that was already uncompressed. In both cases AIFF wins on workflow (no re-decode in Logic or Pro Tools), not on fidelity.

Why is the AIFF so much larger than the original M2TS?

AIFF stores raw uncompressed samples, so size depends on sample rate, bit depth, and channel count rather than how busy the audio is. A 48 kHz 16-bit stereo track runs about 11.0 MB per minute regardless of content. The original .m2ts is far smaller because both its audio and the discarded H.264 video were compressed. In our testing, a one-minute AVCHD clip with 48 kHz 16-bit stereo audio produced an AIFF close to 11 MB.

Does this keep the 5.1 surround sound from a Blu-ray or camcorder track?

No — choosing Stereo or Mono in Audio Channel downmixes the channels rather than keeping them discrete, so a 5.1 AC-3 source is folded into two channels. The AIFF output here is a stereo PCM file, not a surround master. To keep the original surround track intact, convert with M2TS to AC3 instead, which stays inside the AC-3 stream.

My M2TS has several audio tracks — which one gets extracted?

Blu-ray and some camcorder M2TS files multiplex more than one audio track (for example a main mix plus a commentary or a second language). The converter extracts the primary audio stream and writes it to AIFF. If the wrong track comes out or the result is silent, the dialogue may be on a secondary stream that this single-track extract does not select; in that case a desktop tool like MKVToolNix or tsMuxeR lets you pick the exact track before extraction.

AIFF or WAV for a Mac audio workflow?

Both hold identical uncompressed PCM; the difference is the container (AIFF is big-endian IFF, WAV is little-endian RIFF) and ecosystem fit. AIFF is the native recording format in Logic Pro and loads instantly across Apple apps, so it is the natural pick for a Mac-only session. The output here is fixed at 16-bit big-endian PCM; if you want a Windows-native file or more bit-depth choices, use M2TS to WAV at the same quality. For a small, portable, shareable file instead of an uncompressed one, use M2TS to MP3.

How long do you keep my uploaded file?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — never shared or made public. There is no account and no watermark, and the audio is not recompressed beyond the format change you requested. The same audio-only extraction is available from a camcorder-named file at AVCHD to AIFF, since .mts and .m2ts are the same AVCHD stream.