Convert RMVB to MKV — Free Online Converter
Convert RealMedia Variable Bitrate (.rmvb) to Matroska Video (.mkv) online for free. Fast, secure video conversion with no watermarks or registration....
2M+ Files Converted
Trusted by thousands of users
Secure Transfer
HTTPS encrypted uploads
Privacy First
Files auto-deleted after processing
No Registration
Start converting instantly
Works Everywhere
Any browser, any device
How to Convert
Upload your .rmvb 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 RMVB to MKV Conversion
MKV (Matroska Video) is the open-source universal container that can hold virtually any codec, multiple audio tracks, multiple subtitle tracks, chapter markers, and extensive metadata. RMVB is RealNetworks' proprietary container limited to RealVideo/RealAudio codecs. Converting RMVB to MKV preserves the content in a modern, open container with vastly superior player support — VLC, Kodi, Plex, mpv, and PotPlayer all handle MKV natively.
Why Convert RMVB to MKV?
RMVB requires RealPlayer or specialized decoders. MKV is supported by every major media player and streaming server. Crucially, MKV can hold multiple audio tracks (useful for RMVB files that sometimes include both Chinese and English audio) and subtitle tracks (SRT, ASS) in a single file, something RMVB handles poorly.
Common Use Cases
- Migrating RMVB movie archives to MKV for Plex/Jellyfin media server libraries
- Converting RMVB files with dual audio tracks for organized multi-language playback
- Preserving RMVB content in a modern open container with chapter support
- Creating organized media files from RMVB TV series with embedded subtitles
- Converting RMVB content for Kodi-based home theater systems
How It Works
FFmpeg decodes the RealVideo and RealAudio streams and re-encodes to H.264 (or H.265) with AAC audio in the Matroska container. MKV's EBML structure supports ordered chapters, segment linking, and extensive metadata. Multiple audio tracks can be preserved or added, and SRT/ASS subtitle files can be muxed into the container.
Quality & Performance
Re-encoding from RealVideo to H.264 at equivalent or higher bitrates typically improves visual quality — H.264 is significantly more efficient than RealVideo 9/10. At CRF 22-23, the MKV output looks cleaner than the original RMVB, especially in high-motion scenes where RealVideo showed more artifacts.
Device Compatibility
| Device | RMVB | 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
- 1Use MKV for media server libraries (Plex, Jellyfin, Emby) — it's the preferred container that avoids unnecessary transcoding.
- 2Embed subtitle files (SRT, ASS) into the MKV during conversion to keep everything in a single organized file.
- 3If the RMVB has dual audio, preserve both tracks in MKV and set the preferred language as the default track.
- 4Add chapter markers for long movies or multi-episode files to enable easy navigation in media players.
Related Conversions
RMVB to MKV conversion is the ideal migration path for media server users and enthusiasts. MKV's open container, unlimited tracks, and universal player support make it the definitive home for former RMVB content.