MTS Won't Open? Convert to MKV Instantly
Fast, instant MTS to MKV conversion. No signup required. Just drop your .mts file and get .mkv in seconds.
Batch Settings
Generation loss — quality may degrade
MTS uses lossy compression, and so does MKV. 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. MKV 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
MKV lossy compression can produce codec-dependent. 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.
您是否曾为那些珍贵的MTS格式家庭录影或摄像素材感到一丝不便？它们画质虽好，但导入电脑后总感觉“水土不服”，无论是想在手机上与亲友分享，还是导入剪辑软件进行后期处理，甚至是在游戏直播中嵌入精彩片段，MTS的兼容性往往让人头疼。别担心，将MTS转换为MKV，就像为您的视频找到了一个更广阔的舞台。MKV不仅能完美保留MTS的高画质，更以其出色的兼容性和丰富的多媒体封装能力，让您的视频在各种设备和平台之间畅行无阻。告别格式困扰，让您的精彩瞬间以最便捷、最高效的方式触达每一个角落。
- 微信视频号分享
- 手游录像剪辑
- 家庭影音存档
在华语地区，尤其是移动互联网普及的背景下，MKV格式因其对多种编码的支持和良好的播放兼容性，在用户间分享高清视频、甚至作为二次元内容爱好者收藏高品质动画的首选格式之一。
About MTS to MKV Conversion
Dealing with a MTS file that won't open on your device? You're not alone — MTS compatibility issues are one of the most common reasons people search for a file converter. MTS (AVCHD) is the format from camcorders recording in high-definition AVCHD.
The fix is simple: convert your MTS to MKV. MKV (Matroska) is an open container supporting virtually any codec, multiple audio tracks, and subtitles. This conversion lets you improve file compatibility across devices, solving the problem in seconds rather than hours of troubleshooting.
Full Name: MTS uses AVCHD Video, while MKV uses Matroska Video. Compression: MTS uses Lossy, while MKV uses Lossy. Color Depth: MTS uses 8-bit, while MKV uses 8–10 bits (codec dependent). MTS uses lossy compression, and so does MKV. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible.
CocoConvert processes your MTS file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
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 MKV uploads. Common misconception: ""I'll convert to MKV and then back to MTS — it'll be the same"" — in reality, each lossy conversion cycle permanently degrades quality. going mts → mkv → mts will produce a noticeably worse file than the original. always keep your source file.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert MTS to MKV
- 1
Add your MTS file
Drag and drop your .mts file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick MKV output
Select .mkv as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The video engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .mkv file. For batch jobs, download all at once as a zip.
What Happens When You Convert MTS to MKV
Your MTS video is transcoded — video and audio streams are decoded and re-encoded into the MKV container. This is a lossy process that takes time proportional to the video duration.
Your MTS file is demuxed — video, audio, and subtitle streams are separated
The video stream is decoded frame-by-frame, then re-encoded with MKV-compatible codecs (typically H.264 for MP4)
The audio stream is decoded and re-encoded (or copied if the codec is compatible)
Subtitle and chapter data is preserved where the target supports it
Streams are muxed into the MKV container and the file is saved
MTS vs MKV — Detailed Comparison
| Feature | .MTS | .MKV |
|---|---|---|
| Full Name | AVCHD Video | Matroska Video |
| Compression | Lossy | Lossy |
| Color Depth | 8-bit | 8–10 bits (codec dependent) |
| HDR Support | No | Yes |
| Typical File Size | 100–200 MB per minute | 50–200 MB per minute |
| Platform Support | Limited | Very Wide |
| Browser Support | none | Limited |
| Year Created | 2006 | 2002 |
| Open Standard | No | Yes |
Should You Convert MTS to MKV?
When to Convert
- ✓Your MTS file won't open on a recipient's device or in an application
- ✓A website, service, or platform only accepts MKV uploads
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 MKV
"I'll convert to MKV and then back to MTS — it'll be the same"
Each lossy conversion cycle permanently degrades quality. Going MTS → MKV → MTS will produce a noticeably worse file than the original. Always keep your source file.
Frequently Asked Questions
Why won't my MTS file open?
MTS files may not open if your device lacks the right codec or application. Converting to MKV — a more widely supported format — usually resolves this. MKV (Matroska) is an open container supporting virtually any codec, multiple audio tracks, and subtitles.
Is it safe to convert MTS to MKV online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting MTS to MKV?
MTS uses lossy compression, and so does MKV. Converting means decoding and re-encoding — each cycle can permanently degrade quality. Convert from the original source file whenever possible. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my MTS file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert MTS to MKV on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.