Convert any video file to Opus format online for free. Fast, secure, and easy-to-use video to Opus converter with no software installation required.
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Max file size: 50 MBMax duration: 30 min
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Drag and drop your FLV file, or click to browse for it.
Choose Opus as the output and click Convert. The conversion runs on our servers, so your device does none of the work.
Download your converted file instantly. The download link expires in 1 hour for security.
Our powerful servers process your files quickly, delivering converted files in seconds.
Convert your files completely free with no hidden costs or subscription fees.
Your file is used only to make your conversion. It is never published or shared, and the download link expires after one hour.
Works directly in your web browser. No software download or installation required.
How the two formats differ on the things that change your result.
| Specification | FLV (source) | Opus (result) |
|---|---|---|
| Container | Flash Video | Ogg |
| Developed by | Adobe (Macromedia) | Xiph.Org / IETF |
| Introduced | 2002 | 2012 |
| Audio codecs | AAC, MP3 | Opus |
| Compression | Lossy | Lossy |
| Typical bitrate | 128–384 kbps | 64–256 kbps |
| Approx. file size | 7.5–60 MB per minute | 0.48–1.44 MB per minute |
| Metadata / tags | — | Vorbis comments |
| Licensing | Proprietary | Royalty-free |
| Plays natively on | Needs a player: Windows, macOS | Native: Web browsers, Android · Needs a player: Windows, macOS, iOS |
| Best for | legacy archives, web archives | voice and calls, podcasts, web delivery |
This extracts the audio and discards the video entirely. The soundtrack inside a FLV file is typically AAC, and it is re-encoded to Opus on the way out.
Expect a much smaller file. Video accounts for most of the bytes, so about 34 MB per minute becomes roughly 1 MB per minute of Opus.
Extracting Opus audio from a FLV video pulls the soundtrack out of the Flash Video container and writes it as a standalone Ogg file. The video stream, which holds most of the data, is discarded.
Developed by Adobe (Macromedia) in 2002, FLV carries H.264, Sorenson Spark, or VP6 video and AAC or MP3 audio. That combination sets the upper bound on what any conversion can preserve.
Opus was introduced by Xiph.Org / IETF in 2012. It holds lossy-compressed audio (Opus) and plays natively on web browsers and Android.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
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