M2TS to AAC Converter

Extract AAC Audio from M2TS Online

This converter pulls the audio track out of an M2TS file and saves it as AAC — the video is discarded, you keep only the sound. M2TS is the BDAV MPEG-2 Transport Stream that Blu-ray Discs and AVCHD camcorders wrap their footage in, so this is the quick way to lift a concert recording, an interview, or event audio out of home-theater or camcorder clips for a podcast, a music edit, or an audio-only archive — no sign-up, no watermark.

How to Extract AAC from M2TS

1. Upload Your M2TS File: Drag and drop your .m2ts clip onto the page or click "+ Add Files". Batch is supported, so you can drop several clips and extract them with the same settings.
2. Set the Quality Preset: Open Advanced Options. Quality Preset defaults to "Very High (Recommended)", which suits most footage — or switch to Custom Bitrate / Constant Bitrate to set the AAC bitrate directly. Match or exceed the source bitrate; encoding higher than the original can't recover detail a lossy track already discarded.
3. Set Audio Channel and Sample Rate (optional): Leave Audio Channel and Audio Sample Rate on "Original" to keep what the source recorded, or set Audio Channel to stereo to downmix a 5.1 surround track to two channels. Use Trim to keep only part of a clip.
4. Convert and Download: Click "Convert" and download your AAC file.

What Happens to the Audio: AC-3/DTS vs. LPCM

The result depends on what audio the M2TS actually carries. On Blu-ray and AVCHD, BDAV mandates one of three audio types, and AAC extraction behaves differently for each.

For an AC-3 or DTS source, set the AAC bitrate at or above the source rate (BDAV audio commonly runs 256 or 384 kbit/s) so the second-generation loss stays minimal. A 5.1 surround track downmixes to stereo if you set Audio Channel to stereo; leave it on "Original" to keep every channel.

Frequently Asked Questions

Does this keep the video, or just the audio?

Just the audio. This is an extraction: the video inside your M2TS clip is discarded and only the soundtrack is written out as an AAC file. If you want to keep the picture too, convert M2TS to MP4 instead, which re-encodes both the video and audio into a single playable file.

Can I extract audio from a commercial Blu-ray movie's M2TS files?

Only if they aren't copy-protected. Commercial Blu-ray discs are almost always encrypted with AACS (and sometimes BD+), and those encrypted M2TS streams can't be read or converted while the protection is in place — no conversion tool can legally bypass it. This converter works on M2TS files you can already open: your own AVCHD camcorder footage, your own renders, unprotected recordings, or discs you've already decrypted with separate software. It can't decrypt a protected disc for you.

What audio does an M2TS file contain, and does it affect AAC quality?

BDAV — the Blu-ray/AVCHD format M2TS uses — mandates Dolby Digital (AC-3), DTS, or Linear PCM audio. AC-3 and DTS are already lossy, so extracting them to AAC is a lossy-to-lossy transcode that can match but not exceed the source. Linear PCM is lossless, so extracting that to AAC is a clean first-generation encode. Either way, set the AAC bitrate at or above the source (BDAV audio commonly runs 256–384 kbit/s) to keep any second-generation loss minimal.

Can it downmix a 5.1 surround track to stereo AAC?

Yes. If your clip carries a 5.1 surround track and you want a standard two-channel file, set Audio Channel to stereo in Advanced Options and the six channels are downmixed to two during extraction. Leave Audio Channel on "Original" to keep every channel in the AAC output. In our testing, a 1080p AVCHD clip with a 5.1 AC-3 track at 384 kbit/s downmixed cleanly to a stereo AAC track at the same bitrate.

Should I extract to AAC or MP3, and is M2TS the same as MTS?

AAC (Advanced Audio Coding) is the MPEG/ISO-IEC successor to MP3 and generally sounds better at the same bitrate, which makes it the better target for an extracted soundtrack you'll edit or publish; choose M2TS to MP3 only if a specific tool requires MP3. And .m2ts and .mts are the same BDAV transport stream — .m2ts is the Blu-ray and computer spelling, .mts is what AVCHD camcorders write on the card — so MTS to AAC does the identical extraction for camcorder-named footage.

How are my files handled, and is there a size limit?

Your M2TS file is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public. In our testing the main practical limit is upload size and time rather than the extraction itself: an M2TS clip carries full HD video alongside the audio, so a long recording can take a while to upload even though pulling out the soundtrack is quick. Trimming to the segment you need first keeps the upload manageable.