Convert MTS to M4A
Convert any video file to M4A format online for free. Fast, secure, and easy-to-use video to M4A converter with no software installation required.
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Max file size: 50 MBMax duration: 30 min
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How to Use MTS → M4A
Upload File
Drag and drop your MTS file or click to browse. Supports files up to 1GB.
Convert
Select M4A as your output format and click convert. Our servers will process your file instantly.
Download
Download your converted file instantly. The download link expires in 1 hour for security.
Why Choose Scriptivox MTS to M4A Converter?
Fast Conversion
Our powerful servers process your files quickly, delivering converted files in seconds.
100% Free
Convert your files completely free with no hidden costs or subscription fees.
Secure & Private
Your files are encrypted and automatically deleted after conversion. We never store or share your data.
No Installation
Works directly in your web browser. No software download or installation required.
MTS vs M4A: format comparison
How the two formats differ on the things that change your result.
| Specification | MTS (source) | M4A (result) |
|---|---|---|
| Container | AVCHD | MPEG-4 Part 14 |
| Developed by | Sony / Panasonic | Apple / MPEG |
| Introduced | 2006 | 2003 |
| Audio codecs | AC-3, LPCM | AAC-LC, HE-AAC, ALAC |
| Compression | Lossy | Depends on codec |
| Typical bitrate | 128–384 kbps | 96–256 kbps |
| Approx. file size | 128–210 MB per minute | 0.72–1.92 MB per minute |
| Metadata / tags | — | MPEG-4 iTunes-style atoms |
| Licensing | Patent-licensed | Patent-licensed |
| Plays natively on | Needs a player: Windows, macOS, Android | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs |
| Best for | camera footage, camcorder transfers, video editing | the Apple ecosystem, music libraries, audiobooks |
What changes when you convert MTS to M4A
Only the soundtrack survives: the video stream is dropped, and the AC-3 audio inside the MTS file is re-encoded as AAC-LC.
The size drop is dramatic because the video stream is where nearly all the data lives. A minute of MTS runs around 169 MB; the extracted M4A is roughly 1.3 MB per minute.
The source can carry more than one audio track, for example alternate languages or a commentary. Extraction takes the primary track.
About MTS to M4A Conversion
This tool takes the audio track from inside a MTS file, a AVCHD container from 2006, and saves it on its own as M4A. Everything visual is left behind.
MTS comes from Sony / Panasonic and dates to 2006. It carries H.264, which is what determines the quality ceiling of anything you convert out of it.
M4A was introduced by Apple / MPEG in 2003. It carries AAC-LC, HE-AAC, ALAC and has native playback on 6 of six platform categories, which is the practical reason to choose it as a target.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
MTS to M4A: common questions
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