FLV to OGG Converter

FLV to OGG Converter

FLV is the classic Flash Video container from the early YouTube era — old lectures, screencasts, webcam captures, and stream rips, mostly archive material now that Adobe ended Flash Player support on December 31, 2020. OGG (Ogg Vorbis) is the open, royalty-free audio format from the Xiph.Org Foundation. This tool extracts the soundtrack out of an FLV and re-encodes it as a .ogg Vorbis file — the video is discarded, you get audio only — which is exactly what you want for dropping rescued dialogue or music into a game engine or an open-source pipeline that treats Ogg as a first-class format.

FLV Audio Track at a Glance

OGG (Vorbis) at a Glance

How to Convert FLV to OGG

1. Upload Your FLV File: Drag and drop your .flv onto the page or click "+ Add Files". Several files queue and convert with the same settings.
2. Set the Quality Preset or Bitrate: Open Advanced Options. The Audio Codec is Vorbis for OGG output; leave Quality Preset on Highest, or switch to Variable, Constant, or Custom Bitrate to name an exact target — match or exceed the FLV's own audio bitrate, since encoding higher won't recover detail the source never had.
3. Adjust Audio Channel, Sample Rate, or Trim (optional): Leave Audio Channel and Audio Sample Rate on Original, downmix to Mono to shrink a voice file, or use Trim to keep just the segment you need.
4. Convert and Download: Click "Convert" and download your .ogg file. No sign-up, no watermark.

Frequently Asked Questions

Does converting FLV to OGG keep the video?

No. Ogg Vorbis is an audio-only format, so the Sorenson Spark, VP6, or H.264 video inside your FLV is dropped and only the soundtrack is saved as a .ogg file. That is what you want for pulling a lecture, an interview, or a music track out of a Flash-era archive. If you need to keep the picture, convert to a video format with FLV to MP4 instead.

Will I lose quality extracting OGG from an FLV file?

Yes, a little — this is a re-encode, not a copy. FLV audio is almost always already lossy (MP3, AAC, Nellymoser Asao for mic and webcam captures, Speex, or ADPCM), so decoding it and re-compressing it as Vorbis is a lossy-to-lossy generational step. Vorbis cannot rebuild detail the first encode discarded — it can only avoid adding much more. Match or exceed the source bitrate and the extra loss stays inaudible to almost everyone.

Should I pick OGG (Vorbis) or Opus for Flash-era audio?

It depends on where the file is going. Vorbis is the right pick when your target specifically wants Ogg — many game engines and older open-source tools import .ogg Vorbis directly. For a brand-new project, Opus is technically stronger: the Xiph.Org Foundation, which makes both, has recommended Opus over Vorbis since February 2013 because it compresses more efficiently, especially at low bitrates. If your pipeline is flexible, extract Opus from the FLV instead; if you need the broadest device support, extract MP3.

Which Ogg payload does the output use — Vorbis, Opus, or FLAC?

This page outputs Ogg Vorbis, the lossy MDCT codec that "Ogg Vorbis" normally refers to, because that is the right match when something asks for a .ogg file. The Ogg container can also carry Opus or lossless FLAC, but wrapping an already-lossy FLV track in FLAC would only inflate the file without recovering any detail the source lost. If you want one of those payloads specifically, use the dedicated FLV to Opus tool.

Will my OGG file play everywhere?

Not quite. Ogg Vorbis plays natively in Chrome, Firefox, Edge, and Opera, in VLC and most desktop players, and on Android — but Safari only added native support in version 18.4 (older Apple systems need a fallback), and many car stereos and older portable players skip it too. Game engines such as Unity, Godot, and Unreal import it directly, which is one of its main strengths. If you need a clip that plays on effectively every device, convert FLV to MP3 instead.

My FLV is a Nellymoser screen recording — will the audio convert?

Yes. Flash captured microphone and webcam audio with the Nellymoser Asao codec, which was tuned for low-overhead real-time speech rather than music fidelity. It decodes and re-encodes to Vorbis normally, but the result keeps the source's narrow bandwidth — Nellymoser-sourced audio can sound thin because that is how it was originally recorded, and a higher Vorbis bitrate will not add back detail that was never captured.

How are my files handled, and is there a size limit?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public. The main practical limit is upload size and time: a long Flash capture can be large because it still carries full video, so it may take a while to upload even though the .ogg you get back is small. In our testing, a 60-second FLV whose audio was 128 kbps MP3, re-encoded to Vorbis at the default Highest preset, came out near 1 MB. To keep just a section, set a Trim start and duration, or run the result through the Audio Cutter afterward.