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Supports: OGV
OGV (Theora video in an Ogg container) and AVI (Microsoft's RIFF-based container) are both dated formats, so this conversion is almost always about compatibility, not modernization: you have an .ogv download from Wikimedia Commons, an old open-web project, or a Linux screen recorder, and you need it inside an AVI that legacy Windows editing tools — VirtualDub, older Premiere/Vegas builds, Windows Movie Maker — will actually open. This tool re-encodes the Theora video to MPEG-4 (Part 2) and the Vorbis audio to MP3, the standard codec pair for AVI. If your goal is a modern, widely-playable file instead of feeding an old Windows workflow, convert OGV to MP4 instead — that is the better target for almost everything in 2026.
.ogv video onto the page, or click "Add Files" to browse. You can queue several files to convert with the same settings.| Property | OGV | AVI |
|---|---|---|
| Container | Ogg (Xiph.Org), RFC 3533; .ogv registered by RFC 5334 |
RIFF subformat (Microsoft + IBM, RIFF from 1991) |
| Introduced | Open-web / early HTML5 era (~2007-2012) | November 10, 1992, as part of Video for Windows |
| Typical video codec | Theora (lossy; libtheora 1.0, Nov 2008, from On2 VP3) | MPEG-4 Part 2 here by default; also Xvid, DivX, H.264 |
| Typical audio codec | Vorbis (lossy); container can also carry Opus or FLAC | MP3 here by default; also AAC, AC3, PCM |
| Known limits | Theora decoding being removed from Chromium (~Chrome 123) | No B-frames in original spec, no native subtitles/attachments, OpenDML needed for files over 2 GB |
| Best for | Open-web archives, Wikimedia Commons, Linux desktops | Legacy Windows editors and capture tools (VirtualDub, older NLEs) |
No — and nothing can. The OGV's Theora video is already lossy, so this conversion decodes it and re-encodes to MPEG-4 (Part 2), which is a fresh lossy generation on top of footage that was compressed once already. Theora and MPEG-4 Part 2 are broadly comparable in efficiency, so at a high preset the picture stays close to the source, but detail Theora discarded cannot be rebuilt. The Vorbis audio is likewise re-encoded to MP3, a second lossy pass on the soundtrack. Keep Quality Preset high to minimize what the re-encode adds.
The honest answer is: only for compatibility with old Windows software. AVI dates to 1992, and the practical reason to choose it today is a legacy editor or capture tool — VirtualDub, an older Premiere/Vegas build, Windows Movie Maker — that ingests AVI cleanly but chokes on Ogg. For playback, sharing, or any current editor, convert OGV to MP4 produces a smaller, far more compatible file. Both OGV and AVI are dated; AVI just happens to be the one old Windows tools expect.
By default the AVI carries MPEG-4 Part 2 video with MP3 audio, the most broadly recognized pairing for the container. In Advanced Options you can switch Video Codec to Xvid or DivX — both well-understood by old Windows encoders — or to H.264 if your target player supports H.264-in-AVI. Note that AVI's original specification has quirks here: it has no native support for B-frames and handles some variable-bitrate MP3 below 32 kHz unreliably, which is part of why MP4 superseded it.
Yes. Wikimedia Commons and early HTML5 / open-web projects published video as .ogv, and Linux screen recorders produced it too. Those are valid Ogg/Theora video files and convert to AVI normally. Most use Vorbis audio, so expect the standard Theora→MPEG-4 and Vorbis→MP3 re-encode — you are repackaging the existing footage for legacy tools, not improving it. In our testing, a 480p Theora/Vorbis OGV from an open-web archive converted to a clean MPEG-4/MP3 AVI that opened directly in VirtualDub.
It can. AVI uses lighter compression than modern containers and MPEG-4 Part 2 is less efficient than H.264 or AV1, so the AVI is often larger than both the source OGV and an equivalent MP4. The original AVI format also could not exceed 2 GB until the OpenDML extension raised that ceiling. If size matters, lower the Quality Preset or reduce the resolution, or skip AVI and convert OGV to MP4 for a much smaller result at similar quality.
Your OGV is uploaded over an encrypted connection, processed on our servers, and the files are deleted automatically a few hours after conversion. There is no sign-up, no watermark, and your files are never shared or made public.