WebM to VOB Converter

How to Convert WebM to VOB Online

1. Upload Your WebM File: Drag and drop or click "+ Add Files" to select WebM clips from your computer. Batch upload is supported, which is handy when you are stitching several short clips into a single DVD title.
2. Pick Encoding Mode and Quality Preset: Default is Variable Bitrate at the "Very High (Recommended)" preset, which targets disc-friendly MPEG-2 quality. Switch to Constant Bitrate for tighter capacity planning, Constant Quality (CRF-style) for one-pass encodes, or Specific file size if you are filling a 4.7 GB DVD-5 or 8.5 GB DVD-9 down to the megabyte.
3. Set Resolution and Trim (Optional): Pick a Preset Resolution (480p for NTSC, 576p for PAL), scale by Resolution Percentage, lock Width or Height with aspect ratio kept, or enter a custom Width x Height. Use Trim → Time Range to cut intros, ads, or dead air before encoding.
4. Convert and Download: Click Convert. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared. Drop the resulting.vob into the VIDEO_TS folder of a DVD authoring tool such as DVDStyler or ImgBurn to finish the disc.

Why Convert WebM to VOB?

WebM is Google's royalty-free web container, released in May 2010 and built on the Matroska structure with VP8, VP9, or AV1 video and Vorbis or Opus audio. It is excellent for HTML5 streaming but no consumer DVD player can read it. VOB (Video OBject) is the container DVD-Video burns to disc — an MPEG-2 program stream with AC-3, MPEG audio, LPCM, or DTS audio, split into 1 GiB chunks so the FAT-era filesystems on standalone players can read them. Converting WebM to VOB is the bridge between "video that lives on the web" and "video that plays on a DVD deck under a TV."

• Burn home-movie DVDs that play on legacy players — Smart TVs and game consoles play WebM directly, but a 2007 Sony progressive-scan DVD player or a hotel-room deck does not. VOB output dropped into VIDEO_TS makes the disc bootable on any DVD-Video-compliant hardware sold since 1996.
• Author multi-title discs in DVDStyler, DVD Flick, or AVStoDVD — These free authoring tools expect MPEG-2 elementary streams or VOB inputs. Pre-converting from WebM removes the slow internal re-encode step and lets you preview the disc layout sooner.
• Archive YouTube downloads on physical media — yt-dlp defaults to WebM for VP9 streams. Converting to VOB lets you back up a family channel, conference recording, or game playthrough onto a stack of DVDs that survive cloud account deletion.
• Hand off a master to a duplication house — Most US disc-duplication services accept VIDEO_TS folders or DVD ISO images directly; many do not accept WebM source files. Sending compliant VOB skips a billable conversion fee.
• Play on standalone DVD recorders, in-car DVD systems, and karaoke decks — These devices follow the DVD-Video spec literally: MPEG-2 at up to 9.8 Mbit/s, 720x480 NTSC or 720x576 PAL, AC-3 audio. WebM trips them every time.
• Distribute training and church videos — Many community organisations still mail physical DVDs to people without reliable broadband. VOB is the only safe authoring container for that audience.

WebM vs VOB — Format Comparison

DVD-Video Encoding Quick Guide

The hard ceiling is 9.8 Mbit/s for video; the combined multiplex (video + audio + subtitles + navigation) must stay under 10.08 Mbit/s or some standalone players will stutter.

Frequently Asked Questions

Why can't my DVD player read the WebM file directly?

Standalone DVD players, in-car decks, and most Blu-ray players that "also play DVDs" implement the DVD-Video specification strictly: MPEG-1 or MPEG-2 video at 720x480 (NTSC) or 720x576 (PAL) inside a VIDEO_TS/VOB structure. WebM is a Matroska-based container holding VP8, VP9, or AV1 — none of which appears in the DVD-Video spec. The player's firmware has no decoder for those codecs and no filesystem hook to read.webm. Converting to VOB and authoring a VIDEO_TS folder is the only way to make the disc spin up.

Will the converted VOB burn to a DVD on its own, or do I need authoring software?

The.vob file is necessary but not sufficient. A DVD-Video disc needs the full VIDEO_TS folder with matched IFO (navigation), BUP (backup), and VOB (content) files plus a VIDEO_TS.IFO/BUP at the top of the title set. Free authoring tools — DVDStyler, DVD Flick, AVStoDVD, or ImgBurn's "Build" mode — wrap your VOB into that structure, add menus, and burn the ISO. Just dragging a.vob to a blank DVD with the OS burner produces a data disc that DVD players will not play.

NTSC or PAL — which should I pick?

Match the destination region. North America, Japan, and most of South America use NTSC at 720x480 / 29.97 fps. Europe, most of Africa, Australia, and most of Asia use PAL at 720x576 / 25 fps. Most modern players are multi-standard so the wrong choice usually still plays, but older standalone decks (especially in-car units pre-2010) refuse the off-region disc. If you do not know the destination, NTSC is the safer default for North-America-shipped players.

Why does the VOB file end up smaller than my WebM source?

WebM with VP9 or AV1 is more bitrate-efficient than MPEG-2, so a 10-minute VP9 clip at 2 Mbit/s might be ~150 MB while the equivalent MPEG-2 at DVD-quality 5 Mbit/s is ~375 MB. The arrow can also point the other way: a low-bitrate web WebM blown up to a 720x480 DVD master at 6 Mbit/s grows significantly. The output size is whatever your bitrate target × runtime works out to, not a function of the input size.

Can a single VOB file exceed 1 GB?

No. The DVD-Video spec splits a title into 1 GiB chunks (VTS_01_1.VOB, VTS_01_2.VOB, and so on) so the disc remains readable on operating systems and embedded filesystems that cannot handle larger single files. Authoring software handles the split automatically when you build VIDEO_TS — the converter here outputs a single VOB suitable for that authoring step. For a feature-length DVD-9, expect five to eight 1 GiB segments after authoring.

Will resolution above 720x480 be preserved?

No, and this is by design. The DVD-Video spec only allows 720x480 (NTSC) or 720x576 (PAL), with 704, 352, and 352-half-D1 sub-modes. A 1080p WebM source will be downscaled to one of those rasters. If you need HD on physical media, you want Blu-ray (BDMV with H.264 or HEVC) instead — convert WebM to MP4 for HD-friendly delivery, or WebM to AVI for older Windows workflows.

What audio codec should I leave selected?

AC-3 (Dolby Digital) at 192-384 kbit/s is the universal default — every DVD player decodes it, surround support is built in, and it is what commercial DVDs use. MPEG-1 Layer II is a smaller fallback that some standalone decks (especially older PAL-region players) actually prefer. LPCM is uncompressed and burns disc space fast (1.536 Mbit/s for stereo) but is bit-perfect for music DVDs. DTS sounds great but is optional in the DVD spec — some budget players skip the track.

Can I go back from VOB to WebM if I change my mind?

Yes — VOB to MP4 is the most common round-trip target, and from MP4 you can hop to any web container including WebM. Be aware you will not regain quality lost in the first MPEG-2 encode; the second conversion just rewraps and re-encodes what is already there. If you might need both deliverables, keep the original WebM as a master and treat the VOB as a render.

Is there a related conversion I should consider instead?

If you only need a DVD-compatible MPEG-2 elementary stream (no VOB chunking, no IFO/BUP, just a raw.mpg) for a different authoring pipeline, use WebM to MPEG or WebM to MPG. If your source is already MP4 instead of WebM, MP4 to VOB is the more direct path with one less codec hop.