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.
FLV作为曾经风靡一时的网络视频格式，在许多老旧平台和下载内容中依然常见。然而，随着技术发展，MTS凭借其高画质、适应现代设备的特点，逐渐成为专业摄像和高清回放的主流。当您手头有珍贵的FLV视频，无论是早年的游戏录像、网络课堂，还是从旧设备导出的家庭片段，想要在最新的电视、电脑或移动设备上流畅播放，甚至进行后期编辑，那么将FLV转换为MTS就显得尤为必要。这一转换不仅能提升视频的视觉体验，还能确保内容在不同设备间的兼容性与传输便捷性。我们深知您对画质和效率的追求，因此提供便捷、高效的转换服务，让您的旧视频焕发新生。
- 旧网课FLV转高清MTS便于学习
- 游戏录像FLV转MTS优化剪辑
- 手机分享FLV转高兼容MTS
在中国大陆和东南亚，许多早期视频网站和本地化内容曾大量采用FLV格式。转换为MTS后，视频更便于在微信、B站等平台分享，或导入国内主流剪辑软件（如剪映、达芬奇）进行二次创作。
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.