CONVERT
VOB → MKV
Tap to choose your fileDRAG. DROP. DONE.
Upload any file and our engines will handle format detection automatically.
Max 100 MB · Free plan · No signup required
Convert to:
Detecting available formats...
Optimize for
Leave empty to use original name. Extension added automatically.
Uploading...
Processing your file...
Fast, secure VOB to MKV conversion. No registration required.
Here is the short version — VOB is the DVD-Video container that holds the MPEG-2 streams on a DVD disc. Hence the need for MKV. Repackaging a VOB file into MKV is one of the fastest video jobs there is. When the codecs already match the target container specification, the bytes are literally copied across — no re-encoding, no quality drop, no long wait. Upload above and watch the progress bar usually fly. Background. VOB is the DVD-Video container that holds the MPEG-2 streams on a DVD disc. Destination side, MKV is the Matroska container, flexible enough to carry nearly any codec plus chapters and subtitles.
DVD Video Object
Source formatVOB (Video Object) is the container format for DVD video content.
Matroska Video
Target formatMKV is a flexible, open-standard container format that can hold unlimited video, audio, subtitle, and metadata tracks. It is popular for high-definition video and supports virtually any codec.
Why convert VOB to MKV
Matroska Video is better supported than DVD Video Object across web uploads, social networks and consumer devices. Converting trades the niche advantages of VOB for broad playback and fewer "file type not supported" messages. Stream copy (when codecs match) keeps the video bit-identical to the source.
HOW TO CONVERT
VOB → MKV
Upload the VOB
Drop your VOB onto the uploader. Files up to 100 MB run on the free tier without registration.
Stream-copy or re-encode
FFmpeg probes the codecs; if compatible, it stream-copies (no quality loss). Otherwise it transcodes at matching bitrate.
Download the MKV
Fetch the converted MKV as soon as it is ready. Both files auto-delete within two hours.
Common Use Cases
Social media uploads
Twitter, Instagram, TikTok and LinkedIn accept MKV directly; VOB is typically rejected or transcoded with unpredictable quality.
Smart TV and Chromecast
Many TVs play MKV out of the box — VOB often shows up as "unsupported format" or skips audio tracks.
iPhone and iPad playback
iOS Photos, AirDrop and native Safari decode MKV without third-party apps; VOB frequently needs VLC.
Web video embeds
HTML5 <video> tags play MKV universally; VOB often requires clunky object-tag fallbacks or server-side transcoding.
VOB vs MKV — Strengths and limitations
What each format does best, and where it falls short.
VOB Strengths
- Universal DVD support on every player ever made.
- Carries multiple audio tracks, subtitles, and menus in one container.
- Mature tooling ecosystem for extraction and editing.
Limitations
- Hard 1 GB file-size cap forces multi-file splits.
- MPEG-2 compression is 2-3× larger than modern codecs.
- Tied to CSS copy protection — decryption was once illegal.
MKV Strengths
- Carries virtually any codec — H.264, H.265, AV1, VP9, Opus, FLAC, AAC, you name it.
- Multiple audio and subtitle tracks, chapters, and menus in one file.
- Patent-free container — no licensing fees.
- Attached fonts and metadata ride along for self-contained playback.
- Streamable and seekable with built-in index/cue tables.
Limitations
- Not natively supported in Apple's QuickTime or Safari without third-party tools.
- Windows needed codec packs (or "Films & TV" app updates) to play it out of the box.
- Hardware decoders on older TVs and streamers often reject MKV.
VOB vs MKV — Technical specifications
Side-by-side comparison of the technical details.
VOB
- MIME type
- video/dvd
- Extension
- .vob
- Container
- MPEG-2 Program Stream with DVD extensions
- Video codec
- MPEG-2
- Audio codecs
- AC-3, DTS, MPEG audio, LPCM
MKV
- MIME type
- video/x-matroska
- Extensions
- .mkv, .mka (audio), .mks (subtitles)
- Container structure
- EBML (Extensible Binary Meta Language)
- Related
- WebM (restricted MKV subset)
- Max tracks
- Practically unlimited
| Specification | VOB | MKV |
|---|---|---|
| MIME type | video/dvd | video/x-matroska |
| Extension | .vob | — |
| Container | MPEG-2 Program Stream with DVD extensions | — |
| Video codec | MPEG-2 | — |
| Audio codecs | AC-3, DTS, MPEG audio, LPCM | — |
| Extensions | — | .mkv, .mka (audio), .mks (subtitles) |
| Container structure | — | EBML (Extensible Binary Meta Language) |
| Related | — | WebM (restricted MKV subset) |
| Max tracks | — | Practically unlimited |
VOB vs MKV — Typical file sizes
Approximate file sizes for common scenarios.
VOB
- Single VOB segment ~1 GB (capped)
- 2-hour DVD movie (full VIDEO_TS) 4-7 GB
MKV
- 45-min episode (H.264 1080p) 800 MB - 1.6 GB
- 2-hour movie (H.265 1080p) 1.5-3 GB
- 2-hour movie (4K HDR H.265) 15-40 GB
- Anime episode with 8 subtitle tracks 300-800 MB
Quality & Compatibility
Stream-copy is bit-perfect: when the codecs inside VOB match what MKV can carry, the frames are copied across without re-encoding and the output is visually identical to the source. When transcoding is required, we target CRF 20–23 H.264 — visually transparent for most content — and keep audio bitrate at 192 kbps AAC.
Tips for Best Results
- Stream-copy beats re-encoding by orders of magnitude — check if your VOB already uses MKV-compatible codecs before picking Advanced settings.
- For social uploads, 1080p at 30 fps strikes the best quality-to-size ratio; 4K is often downscaled server-side anyway.
- Keep the VOB if you plan further editing — transcoded MKV is fine for final delivery but not for intermediate edits.
Frequently Asked Questions
Only when it has to. If the codecs inside VOB (usually H.264 or H.265 for video, AAC for audio) are accepted by MKV, we stream-copy — the bytes are repackaged into the new container with zero re-encoding and no quality loss. When the source uses a codec the target does not support, we transcode at a matching bitrate to keep the visual quality close to the original.
With stream copy, expect the job to finish in seconds to tens of seconds regardless of video length — the work is mostly rewriting the container. Transcoding is slower (roughly real-time: a ten-minute clip takes about ten minutes) because every frame must be decoded and re-encoded. The progress bar shows which mode applies.
Yes. Resolution, frame rate, colour space and bit depth are preserved by default; stream copy is literally bit-identical on these parameters. If you explicitly pick a lower bitrate or a different codec in Advanced, the output is rebuilt to those settings, but the default is always "match the source".
Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
MKV/Matroska Container Format: The Open-Source Multimedia Powerhouse
Complete guide to MKV/Matroska container format: EBML architecture, unlimited codec support, chapter systems, PGS/ASS subtitles, mkvtoolnix commands, and comparison with MP4.
Read guideMKV (Matroska) Video Container: Complete Format Guide
Everything about MKV video containers — how Matroska works, supported codecs, subtitle tracks, chapters, and how to convert MKV files.
Read guideVOB Format Guide: DVD Video Files Explained
Complete guide to VOB files — the DVD video format. Learn the DVD directory structure (IFO/BUP/VOB), codecs inside VOB, and how to convert VOB to MP4 or MKV with FFmpeg and HandBrake.
Read guideSecure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.