Convert Ogg Video (.ogv) to Matroska Video (.mkv) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .ogv 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.
OGV uses Theora video with Vorbis audio in the Ogg container, while MKV (Matroska Video) is an open-source multimedia container that can hold virtually any codec combination. Both OGV and MKV are open-source formats, but MKV offers significantly more features: multiple audio/subtitle tracks, chapter markers, attachments, and support for modern codecs like H.264, H.265, VP9, and AV1.
MKV replaces OGV's limitations while keeping everything in the open-source ecosystem. Theora's compression efficiency is poor by modern standards — converting OGV to MKV with H.264 or VP9 video produces dramatically smaller files at better quality. MKV also enables adding multiple subtitle tracks, audio languages, and chapter markers that OGV's simple structure cannot support.
For media servers like Plex, Kodi, and Jellyfin, MKV is the preferred container format with full metadata and subtitle support.
FFmpeg decodes Theora video and Vorbis audio from the OGV, then re-encodes to H.264, H.265, VP9, or AV1 video with AAC, Opus, or Vorbis audio (Vorbis can be preserved or re-encoded) in the MKV container. Additional subtitle tracks (SRT, ASS) and chapter markers can be muxed in during conversion. MKV's EBML structure supports virtually unlimited tracks and rich metadata.
Converting from Theora to a modern codec (H.264, VP9, AV1) dramatically improves quality-per-bitrate. At the same file size, the MKV output looks significantly better than the OGV source. Alternatively, matching OGV quality produces files 30-50% smaller.
| Device | OGV | MKV |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
OGV to MKV modernizes open-source video with better codecs, richer features, and universal media player support while staying in the open-source format ecosystem.
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| No |
| 기능 | OGV | MKV |
|---|---|---|
| 전체 이름 | Ogg Video | Matroska Video |
| 확장자 | .ogv | .mkv |
| 최적 용도 | Open source | Multiple audio tracks |