Convert VOB to MKV — Free Online Converter
Convert DVD Video Object (.vob) to Matroska Video (.mkv) online for free. Fast, secure video conversion with no watermarks or registration....
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Upload your .vob file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mkv file when it's ready.
About VOB to MKV Conversion
DVD VOB files store MPEG-2 video with AC3/DTS audio, subtitles, and navigation in a program stream container. MKV (Matroska Video) is an open-source container that can hold any codec combination with unlimited tracks, chapter markers, attachments, and metadata. MKV is the standard container for digital DVD rips in media server ecosystems.
Why Convert VOB to MKV?
MKV preserves everything from a DVD rip — video, all audio tracks, all subtitle streams, chapter markers — in a single file that Plex, Kodi, Jellyfin, and Emby handle natively. Unlike VOB's split-file structure (multiple VOBs per title), MKV combines everything into one organized file.
MKV also supports re-encoding the MPEG-2 video to H.264 or H.265 for dramatically reduced file size while keeping multiple audio and subtitle tracks.
Common Use Cases
- Ripping DVD collections to MKV for Plex, Kodi, or Jellyfin media server libraries
- Combining multiple VOB files into a single MKV with all audio tracks and subtitles
- Re-encoding DVD MPEG-2 to H.264 in MKV for storage-efficient digital libraries
- Preserving DVD chapter structure in MKV for convenient navigation in media players
- Creating organized digital archives from physical DVD collections
How It Works
FFmpeg or MKVToolNix reads the VOB program stream, extracts all elementary streams, deinterlaces the MPEG-2 video, and muxes everything into MKV's EBML container. For remuxing, the MPEG-2 stream is placed in MKV without re-encoding. For transcoding, H.264 or H.265 replaces MPEG-2 at dramatically lower bitrates. Multiple audio tracks (different languages) and subtitle streams (DVD bitmap subtitles as VobSub or converted to SRT) are preserved.
Quality & Performance
Remuxing MPEG-2 to MKV is lossless — identical quality. Transcoding to H.264 at CRF 20 produces visually equivalent or better quality at 50-70% smaller file size than MPEG-2. H.265 saves even more space.
Device Compatibility
| Device | VOB | MKV |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Recommended Settings by Platform
YouTube
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
TikTok
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Twitter/X
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Discord
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
Tips for Best Results
- 1Preserve all audio tracks and subtitle streams when building a media library — MKV handles unlimited tracks
- 2Transcode MPEG-2 to H.264 CRF 20 for the best quality-to-size ratio at DVD resolution
- 3Map DVD chapter markers to MKV chapters for convenient navigation in media players
- 4Deinterlace during conversion unless your media player handles it (Plex and Kodi can deinterlace on the fly)
- 5Follow Plex/Kodi naming conventions (Movie Title (Year).mkv) for automatic metadata matching
Related Conversions
VOB to MKV is the standard approach for digitizing DVD collections, preserving full content with optional modern codec re-encoding for media server libraries.