FLV Won't Open? Convert to MTS Instantly
Fast, instant FLV to MTS conversion. No signup required. Just drop your .flv file and get .mts in seconds.
Batch Settings
Generation loss — quality may degrade
FLV 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 FLV file may contain FLV metadata metadata. MTS 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
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.
お気に入りのアニメ作品やビジネスプレゼンテーション、あるいは大切な思い出の動画をFLV形式でお持ちですか？ もしそれを、より高画質で汎用性の高いMTS形式へ変換したいとお考えなら、当社のサービスがそのお手伝いをいたします。FLVは一時期、ウェブ動画の主流でしたが、現在ではMTSのような高精細なフォーマットが、映像の美しさを最大限に引き出すために求められています。特に、動きの多いアニメーションや、細部までこだわりたいビジネス資料など、映像の質が作品の評価に直結する場面では、MTSへの変換が大きな意味を持ちます。簡単な操作で、お手持ちのFLVファイルをMTSへと生まれ変わらせ、新たな視聴体験をお楽しみください。縦書きのテロップや特殊なフォントが使われた映像も、品質を損なうことなく変換可能です。
- アニメ同人作品の発表
- 企業向け研修ビデオ
- 家族旅行の記録
日本では、特にアニメーションや高精細な映像コンテンツにおいて、品質の維持が非常に重視されます。MTS形式への変換は、そうした要求に応える上で有効な選択肢となります。
About FLV to MTS Conversion
Dealing with a FLV file that won't open on your device? You're not alone — FLV compatibility issues are one of the most common reasons people search for a file converter. FLV (Flash Video) is a legacy streaming format — converting to MP4 is recommended for modern use.
The fix is simple: convert your FLV to MTS. MTS (AVCHD) is the format from camcorders recording in high-definition AVCHD. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Full Name: FLV uses Flash Video, while MTS uses AVCHD Video. Compression: FLV uses Lossy, while MTS uses Lossy. Color Depth: FLV uses 8-bit, while MTS uses 8-bit. FLV 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.
CocoConvert processes your FLV 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 When you specifically need a MTS file for your workflow. Common misconception: ""I'll convert to MTS and then back to FLV — it'll be the same"" — in reality, each lossy conversion cycle permanently degrades quality. going flv → mts → flv 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 FLV to MTS
- 1
Add your FLV file
Drag and drop your .flv file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick MTS output
Select .mts 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 .mts file. For batch jobs, download all at once as a zip.
What Happens When You Convert FLV to MTS
Your FLV 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 FLV 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
FLV vs MTS — Detailed Comparison
| Feature | .FLV | .MTS |
|---|---|---|
| Full Name | Flash Video | AVCHD Video |
| Compression | Lossy | Lossy |
| Color Depth | 8-bit | 8-bit |
| HDR Support | No | No |
| Typical File Size | 30–100 MB per minute | 100–200 MB per minute |
| Platform Support | Very Limited | Limited |
| Browser Support | none | none |
| Year Created | 2002 | 2006 |
| Open Standard | No | No |
Should You Convert FLV 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
Common Mistakes When Converting FLV to MTS
"I'll convert to MTS and then back to FLV — it'll be the same"
Each lossy conversion cycle permanently degrades quality. Going FLV → MTS → FLV will produce a noticeably worse file than the original. Always keep your source file.
Frequently Asked Questions
Why won't my FLV file open?
FLV files may not open if your device lacks the right codec or application. Converting to MTS — a more widely supported format — usually resolves this. MTS (AVCHD) is the format from camcorders recording in high-definition AVCHD.
Is it safe to convert FLV to MTS 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 FLV to MTS?
FLV 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. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my FLV 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 FLV to MTS 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.