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.
L'univers de la vidéo numérique est vaste et en constante évolution, nécessitant parfois des ajustements pour garantir la compatibilité et la qualité. Si vous travaillez fréquemment avec des fichiers FLV, souvent associés au streaming web ou à d'anciennes plateformes, vous avez peut-être rencontré des situations où ce format n'est plus optimal. Le passage au format MTS, privilégié pour l'enregistrement vidéo haute définition par de nombreux caméscopes numériques, offre une meilleure intégration dans les flux de production professionnels et une conservation supérieure de la qualité d'image. Que ce soit pour l'archivage, le montage ou la diffusion, comprendre comment convertir efficacement vos fichiers FLV en MTS est un atout précieux. Notre outil est conçu pour vous accompagner dans cette démarche, en assurant une transition fluide et performante de vos contenus vidéo.
- Archivage de conférences universitaires
- Conversion de rushes pour post-production audiovisuelle
- Migration de contenus pédagogiques en ligne
En France, en Belgique ou au Québec, l'usage du MTS est courant dans les milieux de la production télévisuelle et documentaire, rendant cette conversion pertinente pour l'intégration dans des chaînes de travail établies.
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.