M4V to OGV Converter

M4V to OGV Converter

M4V is Apple's flavor of the MP4 container — H.264 video with AAC audio, used by iTunes and Apple TV. OGV is video in the open Ogg container from the Xiph.Org Foundation: royalty-free, patent-free, and historically the codec that pushed early HTML5 video. Converting M4V to OGV trades a modern, efficient Apple codec for an older open one — the right move for Wikimedia Commons, Linux, and FOSS pipelines that require royalty-free formats, and the wrong move if you want broad, durable playback. Only DRM-free M4V can be converted; iTunes purchases wrapped in FairPlay DRM cannot.

M4V Format at a Glance

OGV Format at a Glance

Why Convert M4V to OGV (and When Not To)

The honest reason to do this conversion is a pipeline that requires a royalty-free, open-standard video: uploading to Wikimedia Commons or a Wikipedia article (which accept only patent-free formats like Ogg Theora and WebM, not H.264-based M4V), shipping a clip inside an FOSS project or a Linux distribution that refuses non-free codecs, or distributing video where you want zero licensing exposure.

But be clear about the trade. Theora is an older, less efficient codec than the H.264 inside your M4V, so the OGV may be larger or softer at the same size — a lossy-to-lossy re-encode never restores detail. And browsers are removing Theora (details below), while Safari and iOS never supported it at all — the exact opposite of where an M4V plays best. This is for open-format pipelines, not broad compatibility.

If you actually want durable, universal playback, stop here: use M4V to MP4 for the file that plays everywhere, or M4V to WebM for the modern open format — VP9 in WebM is more efficient than Theora and far more widely supported today. For most open-web goals, WebM is the better royalty-free choice than OGV.

How to Convert M4V to OGV

1. Upload Your M4V File: Drag and drop your .m4v onto the page, or click "Add Files" to browse. DRM-free iPhone/iPad exports, iMovie projects, screen recordings, and most modern iTunes files work; FairPlay-protected purchases will fail. Batch is supported.
2. Pick Video Codec and Audio Codec: Under Video Codec the output defaults to Theora — the Xiph codec inside a .ogv — with VP8 available as an alternate; Audio Codec defaults to Vorbis, with Opus, FLAC, or Speex selectable.
3. Set Quality Preset, Resolution, or Trim (Optional): Leave Preset on "Very High (Recommended)", or under File Compression switch to Constant Bitrate, Variable Bitrate, Constant Quality, or Specific file size. Under Video resolution choose "Keep original", a Preset Resolution, Resolution Percentage, or Width x Height. Use Trim → Time Range to cut a segment in the same pass.
4. Convert and Download: Click Convert and save your .ogv file. No sign-up, no watermark.

Frequently Asked Questions

Can I convert a DRM-protected iTunes M4V to OGV?

No. M4V movies and TV shows purchased from iTunes / Apple TV are often wrapped in Apple's FairPlay DRM, which prevents conversion by any online tool — the job fails or produces an empty file. DRM-free M4V — your own iPhone/iPad exports, iMovie projects, screen recordings, and most modern iTunes purchases — converts without issues. There is no legal way to strip FairPlay, so this tool only handles unprotected files.

Will my OGV file be larger or softer than the M4V?

Likely, and that is an honest limit of the format. Your M4V holds H.264, which is more efficient than Theora; re-encoding to OGV means more bits are needed to match the same visual quality, so at a fixed size the picture can look softer, or at a fixed quality the file grows. Because it is a lossy-to-lossy re-encode, no detail is restored — keep "Keep original" resolution and a high preset to minimize added loss. If size matters more than the open-format requirement, M4V to WebM (VP9) is smaller and still royalty-free.

Should I convert to OGV at all, or to WebM?

For most open-web goals, WebM. OGV's Theora is a 2004-era codec that browsers are actively dropping, while WebM (VP9/AV1) is the modern royalty-free format with better efficiency and far wider support. Choose OGV specifically when a target names Ogg Theora — some legacy FOSS tooling, older Wikimedia workflows, or a player that only accepts .ogv. Otherwise use M4V to WebM for an open file, or M4V to MP4 for universal playback.

Why won't my OGV play in modern browsers or on iPhone?

Browsers are removing Theora, and Apple never added it. Per caniuse, Chrome disabled Ogg/Theora by default at version 120, Edge at 122, Opera at 106, and Firefox dropped it as of version 130 — while Safari has never supported it across any version on macOS or iOS. So an .ogv that played a couple of years ago may now show a broken player, and it will not play on iPhone or iPad at all. For in-browser playback today, convert to M4V to WebM or M4V to MP4 instead.

What happens to my AAC audio when it becomes an OGV?

It is re-encoded. Your M4V almost certainly carries AAC; a .ogv normally pairs with Vorbis, so the audio track is converted to Vorbis by default (Opus, FLAC, and Speex are also selectable under Audio Codec). That re-encode is lossy, so pick a generous preset to keep speech and music clean. Vorbis has the broadest OGV player support; Opus is more efficient per byte but a few older Theora-only tools may stumble on it.

Does converting to OGV make it acceptable for Wikipedia or Wikimedia Commons?

Yes — that is the main legitimate use. Wikimedia accepts only patent-free video, so Ogg Theora and WebM are allowed while H.264-based M4V is not. An OGV from a DRM-free M4V uploads cleanly; Wikimedia then transcodes it server-side to WebM for visitors on Safari and other Theora-less browsers, so your Apple-using readers still see the video.

Is Theora still maintained, and is the output spec current?

The Theora I bitstream was frozen in June 2004 and the specification was last revised in 2017, so the format itself is stable and legacy. The reference library, libtheora, still receives occasional maintenance releases (1.2.0 shipped in 2025), but no new codec features are added — Xiph's own forward-looking work moved to Opus for audio and the wider industry to VP9/AV1 for video. The .ogv this page produces is a standard Ogg/Theora + Vorbis file that any current Theora-capable player reads.

How are my files handled, and how long are they kept?

Your file is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after the conversion — no sign-up, no watermark, never shared or made public.