MTS to AAC — Format Comparison & Online Converter
Fast, instant MTS to AAC conversion. No signup required. Just drop your .mts file and get .aac in seconds.
Batch Settings
Generation loss — quality may degrade
MTS uses lossy compression, and so does AAC. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
Some metadata may not survive
Your MTS file may contain AVCHD metadata metadata. AAC has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
What compression artifacts to expect
AAC lossy compression can produce pre-echo at low bitrates. At the high quality settings CocoConvert uses by default, these are usually invisible to the eye. Lower quality settings trade visual fidelity for smaller file sizes.
About MTS to AAC Conversion
MTS (introduced 2006) and AAC (introduced 1997) are both video formats, but they differ in important ways. MTS (AVCHD) is the format from camcorders recording in high-definition AVCHD. AAC (Advanced Audio Coding) offers better quality than MP3 at the same bitrate — the default codec for Apple devices.
Full Name: MTS uses AVCHD Video, while AAC uses Advanced Audio Coding. Compression: MTS uses Lossy, while AAC uses Lossy. Color Depth: MTS uses 8-bit, while AAC uses —.
When you convert MTS to AAC, the goal is to improve file compatibility across devices. MTS uses lossy compression, and so does AAC. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible. Understanding these technical differences helps you choose the right format for your workflow.
Your MTS file is decoded and re-encoded as AAC. The conversion involves 4 steps: (1) your mts file is uploaded and the format is validated, (2) the file content is decoded into its raw representation, (3) the data is re-encoded in aac format with optimal settings, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you Your MTS file won't open on a recipient's device or in an application, or when you A website, service, or platform only accepts AAC uploads. For the opposite direction, CocoConvert also supports AAC to MTS conversion.
How to Convert MTS to AAC
- 1
Upload .mts file
Select your MTS file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .aac
Set AAC as the output format. The converter uses optimal settings based on the MTS→AAC conversion profile.
- 3
Convert
The server-side engine decodes your MTS file and re-encodes it as AAC. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .aac file. Multiple output files can be downloaded together.
What Happens When You Convert MTS to AAC
The audio track is extracted from your MTS video file and saved as AAC. The video frames are discarded.
Your MTS file is opened and the container is parsed to identify audio and video streams
The audio stream is extracted — if it's already in the target codec, it's copied directly (no quality loss)
If transcoding is needed, the audio is decoded and re-encoded as AAC
Video frames, subtitles, and chapter markers are discarded
The AAC file is saved with preserved metadata (title, artist, etc.) where possible
MTS vs AAC — Detailed Comparison
| Feature | .MTS | .AAC |
|---|---|---|
| Full Name | AVCHD Video | Advanced Audio Coding |
| Compression | Lossy | Lossy |
| Color Depth | 8-bit | — |
| HDR Support | No | — |
| Typical File Size | 100–200 MB per minute | 1 MB per minute at 128 kbps |
| Platform Support | Limited | Very Wide |
| Browser Support | none | Universal |
| Year Created | 2006 | 1997 |
| Open Standard | No | Yes |
Should You Convert MTS to AAC?
When to Convert
- ✓You need just the audio track from a video recording
- ✓You're creating a podcast or audio file from video content
- ✓You need a file that works in web browsers
When NOT to Convert
- ✗You're converting just because the file "seems old" — re-encoding lossy-to-lossy always degrades quality
Common Mistakes When Converting MTS to AAC
"I'll convert to AAC and then back to MTS — it'll be the same"
Each lossy conversion cycle permanently degrades quality. Going MTS → AAC → MTS will produce a noticeably worse file than the original. Always keep your source file.
Frequently Asked Questions
What is the difference between MTS and AAC?
MTS (AVCHD) is the format from camcorders recording in high-definition AVCHD. AAC (Advanced Audio Coding) offers better quality than MP3 at the same bitrate — the default codec for Apple devices. Full Name: MTS uses AVCHD Video, while AAC uses Advanced Audio Coding. Compression: MTS uses Lossy, while AAC uses Lossy. Color Depth: MTS uses 8-bit, while AAC uses —.
Does MTS to AAC conversion affect quality?
MTS uses lossy compression, and so does AAC. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
Which format has better compression, MTS or AAC?
MTS uses lossy compression. AAC uses lossy compression. The better choice depends on whether you prioritize file size or quality.
How long does MTS to AAC conversion take?
Most conversions finish in seconds. Larger files or complex video content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is MTS or AAC better for long-term storage?
Both formats use lossy compression, so consider keeping your original source file for long-term storage.
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