Convert FLV to OGG (Vorbis) Online
Extract audio from Flash FLV to royalty-free OGG Vorbis, free, in your browser.
.flv · up to 100 MB
What it's for
FLV to OGG: Flash and legacy YouTube audio to the free format
Flash preservation
Archive Newgrounds Flash game soundtracks in royalty-free OGG Vorbis.
Native HTML5 web
OGG works without plugins in Firefox and Chrome for the HTML5 <audio> element.
Native Android
OGG Vorbis supported since Android 1.0 in MediaPlayer and ExoPlayer without extra codecs.
100% private
FLVs processed in your browser with FFmpeg.wasm. They never leave your device.
How it works
Three steps, no hassle
Upload your FLV file
Drag or select your .flv. Pre-2015 YouTube videos, Newgrounds Flash games, Flash recordings. Up to 200 MB.
Conversion to OGG Vorbis
FFmpeg decodes the MP3 or AAC stream from the FLV and re-encodes to OGG Vorbis. No server uploads.
Download the OGG
Audio ready for Linux playback, game engines, HTML5 web, or podcasts from archived Flash content.
FAQ
Got questions?
OGG Vorbis is the audio format with the best native support in open-source browsers without plugins or distribution royalties. Firefox has had native OGG support since version 3.5 (2009); Chrome and Chromium since their first public release (2008). The HTML5 <audio src='file.ogg'> element works without additional JavaScript in Firefox and Chrome. For open-source web projects (digital archives, WordPress-based podcast platforms with free plugins, multimedia wikis) hosting audio from historical Flash content, OGG Vorbis is the preferred choice over MP3 precisely because it is royalty-free and patent-free, simplifying the legal terms of the project. Converting legacy YouTube FLVs or Flash games to OGG is the standard step for embedding that audio in HTML5 web pages compatible with Firefox without proprietary dependencies.
FLV-to-OGG conversion involves transcoding between two lossy codecs, introducing generation loss. If the FLV contains MP3 at 128 kbps (standard on pre-2012 YouTube) and is re-encoded to OGG Vorbis quality 5 (approximately 160 kbps), the intermediate PCM WAV (the decoded MP3) is recompressed with Vorbis. The compression artifacts of the original MP3 (pre-ringing on transients, spectral smearing at high frequencies) are slightly amplified in the Vorbis re-encoding. For voice content (Flash game narration, video voiceover) the loss is imperceptible at Vorbis quality 5 or above. For musical content where fidelity matters, obtaining audio from the original uncompressed source is recommended when available.
OGG Vorbis is technically suitable for podcasting and is explicitly supported as an enclosure format in the RSS 2.0 specification (the podcast distribution standard). However, practical OGG adoption in the podcast ecosystem is limited: Apple Podcasts and most popular podcasting apps (Spotify for podcasts, Overcast, Pocket Casts, Castro) do not support OGG Vorbis and require MP3 or AAC/M4A. OGG Vorbis for podcasting is the right choice if the podcast is distributed primarily via RSS without relying on Apple platforms, on open hosting platforms like archive.org or AntennaPod, or for technical Linux audiences who prefer free formats.
Adobe Flash Player's death (official support ended December 31, 2020) made Flash content preservation a priority for digital archivists and organizations like the Internet Archive and the Flashpoint project. Flash game soundtracks — especially those from Newgrounds, the most important Flash game platform since 1995 — are cultural heritage of the digital era: composers like Waterflame, ParagonX9, SBB, and F-777 published their original works primarily as Flash game tracks that millions of users encountered on that platform. Converting FLV gameplay recording audio to OGG Vorbis allows archiving soundtracks in a free and open format compatible with long-term digital archives, uploading to Internet Archive (which accepts OGG natively), and distributing preserved audio for digital culture history projects.
Yes. Android has had native OGG Vorbis support since Android 1.0 (2008), included in the platform's multimedia framework (MediaPlayer and Jetpack Media3's ExoPlayer). Android's native music player plays OGG Vorbis without installing additional codecs. The most popular music playback apps on Android (VLC for Android, Poweramp, PlayerPro, BlackPlayer) also support OGG Vorbis natively. This makes OGG Vorbis a practical format for transferring converted FLV audio to an Android device for portable playback. In contrast, iOS does not have native OGG Vorbis support in the AVFoundation framework, though third-party apps like VLC for iOS or Infuse can play it.
FLV files can contain mono or stereo audio. Flash games from Newgrounds and other platforms typically had stereo soundtracks at 44.1 kHz, often in MP3 at 128 or 160 kbps. When converting to OGG Vorbis, FFmpeg preserves the channel configuration of the original stream: stereo remains stereo, mono remains mono. OGG Vorbis natively supports up to 255 channels, though in practice applications only use mono (1 channel) and stereo (2 channels). For Flash game soundtracks that had music loops encoded in SWFs and played as audio streams in gameplay FLVs, the stereo preserved in OGG maintains the panning and amplitude effects the original composer programmed.
Convert FLV to OGG: pre-2015 YouTube and Flash game audio to the free Vorbis format
The FLV (Flash Video) format was the backbone of the internet's audiovisual ecosystem from YouTube's launch in 2005 until the complete transition to HTML5 around 2015. During that period, all YouTube content — from music videos to technical tutorials, live performances, and viral content — was served in FLV via the Flash player embedded in browsers. In parallel, Flash games on platforms like Newgrounds (founded in 1995 by Tom Fulp), Armor Games, and Kongregate used FLV to embed cinematics, trailers, and gameplay recordings shared by users. Adobe Flash Player was the most installed software in the world for much of the 2000s and early 2010s, present on 98% of desktop computers according to Adobe's own statistics in 2009. Flash Player's official death (support ended December 31, 2020) turned all these FLV files into digital heritage that can only be played via emulators like Ruffle or by extracting content to modern formats.
Converting FLV audio to OGG Vorbis is especially relevant in the context of digital preservation of Flash culture heritage and in repurposing legacy audio for modern web projects. In preservation, organizations like the Internet Archive (which hosts the Flashpoint project with more than 170,000 preserved Flash items as of April 2024) and independent archivists documenting the history of internet digital culture work with FLVs of gameplay recordings, trailers, and demos as primary sources for extracting audio from game soundtracks no longer accessible in their original format. OGG Vorbis is the preferred audio format for these archives because it is completely patent-free and accepted natively by the Internet Archive as a storage format. In web repurposing, developers of video game history projects, pop culture wikis, and educational platforms incorporating audiovisual content from the Flash era need audio in a format compatible with modern browsers without plugins.
Convertir.ai performs the FLV-to-OGG conversion entirely in the browser using FFmpeg.wasm. The technical process is: parsing the FLV container per the Adobe Flash Video File Format Specification v10.1 (published 2010), reading Audio type FLV Tags (type 8) containing audio frames; identifying the audio codec via the SoundFormat field in the Audio Tag Header (value 2=MP3, 10=AAC, 0=PCM); decoding the audio bitstream using libavcodec — the libmp3lame decoder for MP3, or libavcodec's native AAC decoder for AAC-LC with AudioSpecificConfig support; converting decoded PCM to 32-bit float internally; re-encoding to OGG Vorbis using libvorbis at quality level 5 by default (approximately 160 kbps variable, transparent quality for voice and pop music from Flash game soundtracks); encapsulating in the OGG container with the three required Vorbis headers (identification, comment, setup) followed by audio packets. The resulting OGG plays natively in Firefox, Chrome, Android, VLC, and any player compatible with the Xiph.Org Vorbis I specification.