OGV to MP4 Converter

How to Convert OGV to MP4 Online

1. Upload Your OGV File: Drag and drop or click "Add Files" to select your .ogv (Ogg Video) file. Batch upload is supported, and files are processed in your browser session.
2. Pick Video Codec and Audio Codec: Default is H.264 video + AAC audio, which plays on every device, browser, and editor. Switch Video Codec to H.265/HEVC for roughly 40-50% smaller files at similar quality, or AV1 for the best compression at the cost of slower encoding. Leave Audio Codec on AAC unless you need MP3, AC3, or Opus.
3. Set Quality Preset, Target File Size, or Resolution (Optional): Under File Compression pick a Quality Preset (Highest, Very High, High, Medium, Low, Very Low, Lowest), enter a Specific file size in MB, or use Constant Quality (CRF 18-23 is a strong default for H.264). Under Video resolution, keep original, drop to a preset (2160p, 1440p, 1080p, 720p, 480p, 360p, 240p), or scale by percentage. Use Trim → Time Range with Start Time and Duration to cut a clip.
4. Convert and Download: Click Convert. The MP4 downloads directly — no sign-up, no watermark, no email required.

Why Convert OGV to MP4?

OGV is the .ogv extension of the Ogg container maintained by the Xiph.Org Foundation, almost always carrying Theora video (a royalty-free codec derived from On2's VP3 and stabilised as libtheora 1.0 in November 2008) and Vorbis or Opus audio. It was the format Wikipedia used for video uploads for years and the open-web alternative to H.264 in the early HTML5 era. The problem in 2026 is that the rest of the world moved on:

• Chrome and Edge dropped Theora playback in 2024 — Chromium removed Theora in version 123 (March 2024), and Edge followed at version 122. Safari and Chrome on Android never supported it. An .ogv that played in your browser two years ago now shows a broken <video> element. MP4/H.264 plays everywhere those browsers still support video at all.
• Social platforms reject OGV uploads — YouTube, Instagram, TikTok, X, LinkedIn, and Facebook all accept MP4 but not .ogv. Converting is the only practical path to posting an old Theora capture.
• Mobile and TV playback — iOS, iPadOS, tvOS, modern Android, Roku, Fire TV, and smart-TV apps decode H.264 in hardware. Theora has no hardware decoder anywhere, so even players that handle it (VLC, mpv) burn CPU.
• Editing in Premiere Pro, Final Cut, DaVinci Resolve, iMovie — none of the major NLEs ingest .ogv natively. Converting to MP4 with H.264 (or ProRes via MOV) makes the clip editable.
• Archive cleanup — old Wikimedia downloads, screen recordings from early Linux distros, and OBS/OpenShot exports often default to .ogv. Re-encoding to H.264 cuts file size 30-50% at matched visual quality.
• WordPress and CMS embedding — <video src="clip.ogv"> increasingly fails in 2026 because the browser, not the server, drops the format. MP4 is the safe default for self-hosted video.

OGV vs MP4 — Format Comparison

Video Codec Quick Guide

Frequently Asked Questions

Why does my OGV file no longer play in Chrome or Edge?

Because Chromium removed Theora decoding in Chrome 123 (March 2024), and Edge dropped it in version 122. The browsers cited rising security risk from media codecs combined with negligible real-world usage. The .ogg audio container still works for Vorbis/Opus audio, but .ogv video falls back to a broken player. Converting to MP4/H.264 restores playback everywhere. If you don't want to convert, VLC, mpv, and the ogv.js polyfill still decode Theora.

Will I lose quality converting OGV to MP4?

A small amount, because both Theora and H.264 are lossy and re-encoding compounds error. In practice, H.264 is significantly more efficient than Theora, so picking Constant Quality (CRF) at 18-20 or Quality Preset "Very High" usually produces a visually identical MP4 that is 20-40% smaller than the source .ogv. The only time you'll see obvious quality loss is at CRF 28+ or Quality Preset "Low/Very Low".

Should I pick H.264 or H.265 for the MP4?

H.264 unless you have a specific reason otherwise. H.264 plays on literally every device with a video decoder — phones from 2010, smart TVs, web browsers, NLEs, the cheapest Android tablet. H.265 cuts file size 40-50% at matched quality but loses some Windows playback (users need the paid HEVC extension from Microsoft Store) and most browsers won't play H.265 inside an MP4. Pick H.265 only for personal archives or HEVC-capable target devices.

Can I trim the OGV during conversion instead of doing it separately?

Yes. Under Trim choose Time Range, then enter Start Time and Duration in HH:MM:SS.sss format (e.g., Start 00:00:10.500, Duration 00:00:30 extracts a 30-second clip starting at 10.5 seconds). This single-pass trim avoids the quality hit of trim-then-re-encode in a separate tool. For audio-only extraction see OGV to MP3.

My OGV is from Wikipedia / Wikimedia Commons — will conversion work?

Yes. Wikimedia served Theora-in-Ogg as the default video container for over a decade before migrating most assets to VP9/WebM around 2018. Older Wikimedia downloads are almost always Theora + Vorbis, which this tool decodes and re-encodes cleanly. Note that Wikimedia attribution requirements (CC BY-SA, etc.) still apply to the converted MP4 — the codec change doesn't reset the license.

Does OGV support transparency, and what happens to it in MP4?

Theora itself does not have an alpha channel — there's no standard "OGV with transparency". If your source plays with a transparent background it's almost certainly a different format (likely WebM with VP9 alpha or a Ogg-wrapped Dirac variant). Standard MP4 with H.264 / H.265 also has no alpha. If you need transparency, convert to WebM with VP9 alpha instead of MP4.

What's the difference between .ogv, .ogg, and .ogx?

All three are Ogg containers from Xiph.Org. .ogg is the historical extension and is now recommended for audio-only Vorbis/Opus streams. .ogv is the Xiph-recommended extension when the container holds video (with or without audio), MIME type video/ogg. .ogx is the multiplexed / generic Ogg extension used when the stream mixes types beyond audio+video. For converting, treat them all as Ogg containers — this tool reads .ogv natively.

Why is my MP4 larger than the source OGV?

Usually because Quality Preset is set to "Highest" or CRF is below 18, which forces H.264 to preserve detail the original Theora encoder threw away. Try Quality Preset "Very High" or CRF 20-23 — you'll typically end up with a smaller MP4 than the source. The other common cause is that the source .ogv was already heavily compressed (Wikipedia uploads, early WebRTC captures); there's a floor beyond which re-encoding can't shrink the file without visible quality loss.

Does this work for batch converting a folder of OGV files?

Yes. Click "Add Files" and select multiple .ogv files (or drop the folder). Each file converts with the same codec, quality, and resolution settings, and downloads individually or as a ZIP. Files process in your browser session, so there's no per-file upload limit beyond your machine's memory. For one-direction batches without quality tuning see also OGV to MOV and OGV to MKV.