M2TS to MP3 Converter

Extract MP3 Audio From M2TS

An M2TS file wraps H.264 video together with a Dolby Digital (AC-3) or Linear PCM soundtrack — the format AVCHD camcorders and Blu-ray discs record to. This page throws the picture away and re-encodes the soundtrack as an MP3 you can drop on any phone, car stereo or player made in the last quarter century. Concert captures, interviews, lectures, band practice recorded on a camcorder: if you only ever needed the sound, this is a one-step conversion, and the only decision that really matters is the bitrate.

How to Convert M2TS to MP3

1. Upload Your M2TS File: Drag and drop the .m2ts (or .mts) clip onto the page, or click "+ Add Files". Several clips can be queued and extracted with the same settings.
2. Pick Constant Bitrate and a Rate: Under File Compression, choose Constant Bitrate and select a value — 320 kbps for music you care about, 192 kbps for a good balance, 128 kbps or lower for speech. Custom Bitrate accepts an arbitrary number instead, and Specific file size lets you aim at a byte budget.
3. Set Audio Channel, Audio Sample Rate or Trim: Both dropdowns offer Original, which keeps the source values — AVCHD records at 48 kHz. Switch Audio Channel to Mono to halve the size of a speech recording, or use Trim to keep only part of a long clip.
4. Convert and Download: Click "Convert" and save the .mp3. No sign-up, no watermark.

Choosing a Bitrate

The Constant Bitrate dropdown runs from 8 kbps to 384 kbps, but MP3 itself does not. MPEG-1 Audio Layer III — standardised as ISO/IEC 11172-3 in 1993 — defines its top rate as 320 kbit/s, and the encoder used here is LAME, which honours that ceiling. Selecting 384 kbps does not produce a 384 kbps file; 320 kbps is the real maximum, and it is the one to pick when you want the best MP3 the format can give.

What Survives the Extraction

If the MP3 Comes Out Wrong

• Silent output — the clip's primary stream may be a secondary or non-standard track. Confirm the M2TS plays with sound in VLC before converting.
• Surround collapsed to stereo — expected, and not adjustable: MP3 cannot hold discrete 5.1. Extract to M4A or FLAC if you need the channels.
• Quieter or louder than the disc — AC-3 carries a dialnorm tag that players apply; re-encoding drops it, so the level shifts. Adjust on playback.
• A tiny offset at the very start — transport streams can begin part-way through an audio frame, leaving a fraction of a second of lead-in. Trim it away if you notice it.
• The file won't upload — a whole-disc capture can run to many gigabytes. Cut it down first with Video Cutter, which accepts .m2ts directly.

Frequently Asked Questions

Why does the bitrate list offer 384 kbps if MP3 stops at 320?

Because that dropdown is shared across the audio codecs the site supports, and some of them — MP2, for example — genuinely reach 384 kbit/s. MPEG-1 Audio Layer III does not: its defined values stop at 320 kbit/s, and LAME will not exceed that. Pick 320 kbps for the maximum-quality MP3 and treat the 384 entry as belonging to a different codec.

My recording is 5.1 surround — do I keep all the channels?

No. The encoder used here writes mono or stereo, so a 5.1 Dolby mix is folded down to two channels during conversion. The MPEG-2 extension to Layer III did define a multichannel mode, but essentially nothing implements it and LAME does not. To keep discrete surround, extract to M4A — AAC carries up to eight channels — or to a lossless target such as FLAC.

Does extracting MP3 from an AC-3 track lose quality?

Yes, some — it is a lossy-to-lossy conversion. The audio was already compressed by the camcorder or the disc author, and MP3 compresses the decoded result again, so artifacts from both encoders can stack. Choosing a rate at or above the source's own (AVCHD typically records AC-3 at 256 or 384 kbit/s) keeps the second pass from doing visible damage. Going the other way — a low rate like 96 kbps on music — makes the loss obvious.

What sample rate should I use?

Original, in almost every case. AVCHD records 48 kHz, which MPEG-1 Layer III supports natively alongside 44.1 and 32 kHz, so nothing needs resampling. The lower entries in the dropdown (24, 16 and 12 kHz, plus 8 kHz) drop into the MPEG-2 and MPEG-2.5 extensions of the format and are only worth choosing for voice recordings where you want the smallest possible file.

Which audio track gets extracted if the file has several?

The primary stream. Blu-ray clips often carry commentary tracks or extra languages, and this conversion takes the first audio stream it finds rather than offering a picker. If the track you want is not first, reorder or demux it in a desktop tool before uploading.

Can I extract just one section instead of the whole recording?

Yes. Set Trim to Time Range and enter a Start time and Duration, in seconds or as HH:MM:SS.sss. If you prefer to cut the video before extracting anything — useful when the source is enormous and only one segment matters — Video Cutter takes .m2ts files directly; the audio-only cutter does not accept video.

Can I do this with a commercial Blu-ray disc?

Only if the stream is not copy-protected. Retail discs are encrypted with AACS, often with BD+ as well, and no conversion service can decode them. This page works on files you can already open: your own AVCHD camcorder footage, unprotected recordings, or discs decrypted separately with software you own. Note that .mts and .m2ts are the same stream with different spellings — MTS to MP3 is the same conversion for camcorder-named files.

What happens to my upload afterwards?

Your M2TS travels over an encrypted connection, is processed on our servers and is deleted automatically after a few hours along with the MP3 — no sign-up, no watermark, never shared or made public. The practical limit is upload size and time, since video files are far larger than the audio you get back; if the MP3 still needs to be smaller afterwards, the audio compressor can shrink it further.