MP4 to MTS for Video Workflows
Fast, instant MP4 to MTS conversion. No signup required. Just drop your .mp4 file and get .mts in seconds.
Batch Settings
HDR data will be tone-mapped
Your MP4 file may contain HDR (High Dynamic Range) data. MTS only supports standard dynamic range (SDR). Highlights and shadows will be compressed to fit the 8-bit range — subtle detail in very bright or dark areas may be lost.
Generation loss — quality may degrade
MP4 uses lossy compression, and so does MTS. 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 MP4 file may contain MP4 atoms, chapter markers metadata. MTS has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
Color depth reduction: 265-bit → 8-bit
MP4 stores up to 265 bits per channel, but MTS supports only 8 bits. You may notice banding in smooth gradients (like sky or skin tones) where subtle color transitions are lost.
What compression artifacts to expect
MTS lossy compression can produce blockiness (H.264). 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.
お気に入りのMP4動画を、よりプロフェッショナルなMTS形式へと変換しませんか？ スマートフォンで手軽に撮影したアニメイベントの記録、ビジネスシーンでのプレゼンテーション動画、あるいは個人的な思い出の映像も、MTS形式にすることで、編集の自由度が格段に向上し、より高品位な映像制作が可能になります。特に、細やかな色表現や高いビットレートを要求される映像作品においては、MTSがその真価を発揮します。このページでは、大切なMP4ファイルを、品質を損なうことなくMTSへとスムーズに変換するお手伝いをいたします。煩雑な設定は不要。数クリックで、あなたの映像コンテンツを次のレベルへと引き上げましょう。
- アニメ同人イベント記録の高画質保存
- ビジネス向け高精細プレゼン資料作成
- 縦書き字幕を活かした短編映画編集
日本の映像制作環境では、MTSファイルは放送局への納品やプロフェッショナルな映像編集スタジオでの利用が一般的です。特に、高解像度での色調整や複雑なエフェクト処理を必要とする際に、その互換性と堅牢性が重宝されます。
About MP4 to MTS Conversion
Whether you're one of the many videographers, editors, and social media managers who work with MP4 files daily, there comes a time when you need MTS instead. MP4 (MPEG-4 Part 14) is the universal video container supporting H.264/H.265 codecs — plays on virtually every device.
Here's a typical scenario: you receive a .mp4 file but your project, platform, or client requires .mts. MTS (AVCHD) is the format from camcorders recording in high-definition AVCHD. Rather than searching for desktop software or wrestling with command-line tools, you can convert MP4 to MTS online in seconds with CocoConvert.
This conversion is ideal when you When you specifically need a MTS file for your workflow. The conversion helps you convert between formats quickly.
Your MP4 file may contain HDR (High Dynamic Range) data. MTS only supports standard dynamic range (SDR). Highlights and shadows will be compressed to fit the 8-bit range — subtle detail in very bright or dark areas may be lost. Common misconception: ""I'll convert to MTS and then back to MP4 — it'll be the same"" — in reality, each lossy conversion cycle permanently degrades quality. going mp4 → mts → mp4 will produce a noticeably worse file than the original. always keep your source file.
Behind the scenes, CocoConvert uses industry-standard tools — FFmpeg for audio and video, Sharp for images, qpdf for documents. Your file is uploaded securely (TLS encryption), processed on isolated servers in Germany, and auto-deleted within 24 hours. No account, no watermark, no hidden fees.
Power users can batch convert up to 100 files simultaneously with a Pro subscription, making it practical for production workflows.
How to Convert MP4 to MTS
- 1
Drop your file
Drag your .mp4 file onto the converter. Need to process many files? Add up to 5 at once (100 for Pro).
- 2
Set output to MTS
Pick MTS from the format list. The converter automatically tunes settings for the MP4→MTS pair.
- 3
Hit Convert
Processing happens server-side — your browser stays responsive. Most video files convert in under 10 seconds.
- 4
Download and use
Your .mts file is ready to plug into your workflow. Download it or share the link (expires in 24 hours).
What Happens When You Convert MP4 to MTS
Your MP4 video is transcoded — video and audio streams are decoded and re-encoded into the MTS container. This is a lossy process that takes time proportional to the video duration.
Your MP4 file is demuxed — video, audio, and subtitle streams are separated
The video stream is decoded frame-by-frame, then re-encoded with MTS-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 MTS container and the file is saved
MP4 vs MTS — Detailed Comparison
| Feature | .MP4 | .MTS |
|---|---|---|
| Full Name | MPEG-4 Part 14 | AVCHD Video |
| Compression | Lossy | Lossy |
| Color Depth | 8-bit (H.264) or 10-bit (H.265/AV1) | 8-bit |
| HDR Support | Yes | No |
| Typical File Size | 50–200 MB per minute (1080p H.264) | 100–200 MB per minute |
| Platform Support | Universal | Limited |
| Browser Support | Universal | none |
| Year Created | 2001 | 2006 |
| Open Standard | Yes | No |
Should You Convert MP4 to MTS?
When to Convert
- ✓When you specifically need a MTS file for your workflow
When NOT to Convert
- ✗You're converting just because the file "seems old" — re-encoding lossy-to-lossy always degrades quality
- ✗You want to preserve HDR information — MTS only supports standard dynamic range
Common Mistakes When Converting MP4 to MTS
"I'll convert to MTS and then back to MP4 — it'll be the same"
Each lossy conversion cycle permanently degrades quality. Going MP4 → MTS → MP4 will produce a noticeably worse file than the original. Always keep your source file.
Frequently Asked Questions
Who needs to convert MP4 to MTS?
This conversion is commonly used by videographers, editors, and social media managers. Typical reasons include convert between formats quickly and ensuring compatibility with downstream tools or platforms.
Can I convert MP4 to MTS without losing quality?
Your MP4 file may contain HDR (High Dynamic Range) data. MTS only supports standard dynamic range (SDR). Highlights and shadows will be compressed to fit the 8-bit range — subtle detail in very bright or dark areas may be lost.
Do I need to install software to convert MP4 to MTS?
No. CocoConvert runs entirely in your browser — no downloads, no plugins. It works on macOS, Windows, Linux, iOS, and Android.
How many MP4 files can I convert at once?
Free users can convert up to 5 files per hour. Pro subscribers get 100 files per hour with larger size limits (5 GB per file). Business API users can integrate batch conversion directly into their tools.
Is there an API for MP4 to MTS conversion?
Yes. CocoConvert offers a Business API for automated conversions. It supports all the same format pairs available in the web interface, including MP4 to MTS.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.