Convert FLV to OGV — Free Online Converter
Convert Flash Video (.flv) to Ogg Video (.ogv) online for free. Fast, secure video conversion with no watermarks or registration....
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Upload your .flv file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .ogv file when it's ready.
About FLV to OGV Conversion
FLV (Flash Video) was Adobe's proprietary web video container that dominated online streaming from 2005 to 2015. OGV (Ogg Video) is the Xiph.org Foundation's open-source video container using Theora video codec (derived from On2 Technologies' VP3) with Vorbis audio. Wikipedia and Wikimedia Commons exclusively use OGV for all video content, and Firefox was the first browser to support OGV natively in 2009. Converting FLV to OGV moves Flash video into the open-source ecosystem.
Why Convert FLV to OGV?
OGV is the video format of the open web movement — entirely patent-free and royalty-free. Wikimedia Foundation requires OGV for all video uploads, and many open-source projects and Linux distributions prefer it. If you are contributing FLV content to Wikipedia, packaging video for open-source software, or targeting the Linux ecosystem where OGV has first-class support, this conversion is necessary.
Common Use Cases
- Uploading FLV recordings to Wikimedia Commons, which only accepts OGV and WebM for video
- Including video content in open-source documentation and wikis that use OGV format
- Distributing FLV-sourced video as part of Linux distribution installation media
- Creating Theora-encoded video for the HTML5 video element in open-web projects
- Packaging educational FLV content for offline wiki projects that require OGV format
How It Works
FFmpeg decodes FLV's Sorenson Spark, VP6, or H.264 video and re-encodes to Theora using the libtheora encoder. Theora supports quality targets from 0 to 10 (with 5-7 being typical for web delivery). Audio is encoded to Vorbis using libvorbis. The output is muxed into an Ogg container with .ogv extension. Theora uses 4:2:0 chroma subsampling and supports resolutions up to 1048560x1048560 in theory, though practical use rarely exceeds 1080p.
Quality & Performance
Theora's compression efficiency is notably lower than H.264 — roughly requiring 30-40% higher bitrates to achieve comparable visual quality. At typical web bitrates (1-2 Mbps), Theora produces acceptable but visibly softer results compared to H.264 at the same bitrate. For Wikimedia and open-source use cases where licensing trumps compression efficiency, this tradeoff is acceptable.
Device Compatibility
| Device | FLV | OGV |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Recommended Settings by Platform
YouTube
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
TikTok
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Twitter/X
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Discord
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
Tips for Best Results
- 1Use Theora quality 7 for a good balance of visual quality and file size in OGV output
- 2Target 720p for Wikimedia uploads — it meets their recommended resolution while keeping files manageable
- 3Pair Theora video with Vorbis audio at quality 5 for consistent open-source encoding throughout
- 4Consider WebM instead of OGV if you do not specifically need Wikimedia compatibility — VP9 is much more efficient
- 5Set the Theora keyframe interval to 64 frames for reasonable seeking performance in web players
Related Conversions
FLV to OGV conversion brings Flash-era video into the open-source world. While Theora's compression efficiency trails H.264, the completely royalty-free nature of OGV makes it essential for Wikipedia, Wikimedia, and open-source projects where patent-encumbered formats are not acceptable.