VOB to OGV Converter

How to Convert VOB to OGV Online

1. Upload Your VOB File: Drag and drop or click "+ Add Files" to select VOB files from your DVD rip folder (VIDEO_TS/) or local disk. Batch is supported, so you can queue several 1 GB DVD segments (VTS_01_1.VOB, VTS_01_2.VOB, etc.) in one job.
2. Pick a Quality Preset (or set File Compression): Open Advanced Options. The default Preset is Very High (Recommended) which targets near-source quality. Drop to High, Medium, Low, or Very Low for smaller files, or switch File Compression to Constant Bitrate, Variable Bitrate, Constant Quality, Constraint Quality, or Specific file size to pin an exact MB or percentage target.
3. Resize or Trim (Optional): Under Video resolution, choose Keep original, a Preset Resolution (480p / 576p / 720p / 1080p), Resolution Percentage, or set custom Width x Height. Under Trim, switch from Unchanged to Time Range to clip a segment by start time and duration. Theora video pairs with Vorbis audio by default — both royalty-free Xiph codecs.
4. Convert and Download: Click Convert. Files are processed server-side over HTTPS and auto-deleted shortly after — no sign-up, no watermark. The converter reads only already-unencrypted VOB files; commercial DVDs protected by Content Scramble System must be decrypted with a separate tool first.

Why Convert VOB to OGV?

VOB (Video Object) is the container DVD-Video uses to multiplex MPEG-2 video, AC-3 / LPCM / DTS audio, and bitmap subtitles, capped at 1 GB per segment by the DVD-Video specification so the discs stay readable on FAT-era filesystems. OGV is the Xiph.Org Ogg container carrying Theora video and Vorbis audio — both released royalty-free and patent-unencumbered, which is why Wikipedia, Wikimedia Commons, and a generation of open-source projects adopted it. Converting VOB to OGV is the right move when a destination explicitly requires .ogv — for general-purpose web video in 2026, WebM with VP9 is now the preferred open-format target.

• Upload to Wikimedia Commons and MediaWiki wikis — Commons still accepts .ogv files, though the project guidance now recommends WebM for new uploads because Theora is significantly less efficient than VP9.
• Archive DVD rips to a patent-free container — Theora and Vorbis ship in libtheora/libvorbis under BSD-style licenses with no per-stream royalties, unlike MPEG-2 (the US patent pool expired in February 2018, but Theora has always been free).
• Match legacy open-source workflows — Xiph-aligned projects, accessibility-focused publishers, and certain digital archives still mandate Ogg Theora as their canonical format for video preservation.
• Cut DVD chapters down to clip-sized files — VOBs are 1 GB DVD segments by spec; an OGV trimmed with Time Range gives you a single 50-150 MB clip suitable for email, LMS upload, or a wiki page.
• Distribute through Linux / BSD environments without codec licensing concerns — many Linux distributions ship Theora/Vorbis in their default media stack, while MPEG-2 decoders sometimes sit in extra repositories (e.g. RPM Fusion on Fedora).
• Open educational resources and museum kiosks — institutions that distribute OER frequently still mandate Ogg Theora in their submission requirements to avoid any downstream licensing audit.

VOB vs OGV — Format Comparison

File Compression Mode Quick Guide

Frequently Asked Questions

Why convert DVD-quality VOB down to OGV when OGV is lower quality?

Quality isn't the question here — licensing and destination requirements are. VOB carries MPEG-2 at 4-9.8 Mbps which isn't a valid HTML5 <video> source in any browser, and most modern targets either reject MPEG-2 outright or charge royalties for it. OGV gives you a sub-3 Mbps, royalty-free file that meets Wikimedia Commons' submission rules and other Xiph-aligned archives. If your only goal is maximum archival quality, convert VOB to MKV or MP4 instead.

Will this strip the CSS encryption on a commercial DVD?

No. Most commercial DVDs are protected by the Content Scramble System, and the VOB files on those discs are encrypted at the disc level. Our converter does not decrypt CSS — it reads only already-unencrypted VOB files (home-recorded DVDs, personal camcorder DVDs, or rips you have legal right to decrypt with a separate tool). If your VOB upload fails with a parse or codec error, it is almost certainly still encrypted.

My VOB is split into VTS_01_1.VOB, VTS_01_2.VOB, etc. — do I upload them one at a time?

You can. Each segment is capped at 1 GB by the DVD-Video specification, so a full title is intentionally split across multiple VOBs. The simplest path is to upload them individually and convert each to its own OGV, then keep the result as a playlist. If you need one continuous file, concatenate the VOBs first with a tool that respects the MPEG-2 PS structure (FFmpeg's concat demuxer, for example) and then convert the combined file.

Why is the OGV so much smaller than the original VOB?

Because Theora at typical web settings (0.5-3 Mbps) is roughly 3-10x more compressed than the MPEG-2 inside a VOB (4-9.8 Mbps), and Vorbis audio is more efficient than AC-3 at comparable quality. You're trading peak fidelity for a portable, royalty-free file. If the size reduction feels too aggressive, bump the Quality Preset up, increase the Constant Bitrate target, or use Constant Quality with a lower qscale (lower number = higher quality on the Theora scale).

Will Chrome, Safari, or Firefox play the converted OGV in 2026?

Largely no longer. Chrome removed Theora support in Chrome 123 (March 2024), citing low usage and accumulating media-codec security risk. Firefox followed by removing Theora in Firefox 130 (released August 2024). Safari has never shipped a Theora decoder, and Chromium-based Edge follows Chrome. OGV will still play reliably in VLC, mpv, and most Linux native players, and the ogv.js polyfill can play .ogv in any modern browser. For a video that plays natively across browsers, convert to WebM (VP9/AV1 + Opus) or MP4 (H.264 + AAC) instead.

Is Ogg Theora still accepted on Wikipedia and Wikimedia Commons?

Yes, but it's no longer the preferred upload format. Commons accepts both WebM and Ogg Theora (.ogv), and the current help page explicitly recommends WebM with VP9 for new uploads — Theora is older and significantly less efficient than VP9. If you're uploading new material to Commons, prefer WebM; OGV is still fine for matching an existing wiki article's format or for migrating legacy archives.

Can I keep just an audio clip from the DVD as Ogg Vorbis?

Yes — use the VOB to OGG tool, which extracts the audio track and re-encodes it to Vorbis in an Ogg audio container. The OGV path keeps video plus audio; the OGG path is audio-only and lands at a much smaller size.

What frame rate and resolution does the OGV inherit from a PAL or NTSC DVD?

By default, Keep original preserves the DVD's native frame rate (29.97 fps for NTSC, 25 fps for PAL) and frame size (typically 720x480 NTSC or 720x576 PAL, interlaced). If you want a progressive web file, pick a Preset Resolution like 480p (854x480) or 576p and the encoder will scale and deinterlace as needed. Note that DVD pixel aspect ratios are non-square (anamorphic widescreen is 16:9 stored in a 4:3 raster), so a pixel-for-pixel copy without aspect correction will look horizontally squashed.

Does the converter handle multiple audio tracks or subtitle streams from the DVD?

The output OGV carries one video stream and one audio stream — typically the first audio track and no subtitles. If your VOB has multiple languages or a director's commentary, only the primary audio track is preserved. DVD subtitle streams (SUB/IDX bitmap subtitles) are not transferred; if you need subtitles, extract them with a DVD subtitle tool first and ship them as a sidecar WebVTT file alongside the OGV.

Is Theora still worth using in 2026, or should I jump to AV1 or VP9?

Theora is older (1.0 released November 2008) and meaningfully less efficient than AV1 or VP9, and as of 2026 the major desktop browsers (Chrome 123, Firefox 130) no longer decode it natively. Theora remains the right pick only when the destination explicitly requires .ogv — certain wiki templates, Xiph-aligned archives, accessibility submissions, and legacy OER systems. For any new general-purpose web target, VOB to WebM (AV1 or VP9) is the modern open-format choice.