Convert MTS to MKV — Free Online Converter
Convert AVCHD Video (.mts) to Matroska Video (.mkv) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
About MTS to MKV Conversion
MKV (Matroska Video) is the most flexible open container format available, supporting virtually unlimited audio, subtitle, and chapter tracks with any codec combination. MTS/AVCHD files use the MPEG-2 Transport Stream container which, while functional, lacks support for embedded subtitles, multiple audio tracks, and chapter navigation. Converting MTS to MKV preserves or enhances the video while unlocking modern container capabilities.
Why Convert MTS to MKV?
Media server software (Plex, Jellyfin, Kodi, Emby) works best with MKV because it can extract and present multiple audio tracks, subtitle streams, and chapter markers to the viewer. AVCHD's MTS container supports none of these features. Converting camcorder footage to MKV enables adding subtitle tracks (for multilingual distribution), embedding chapter markers (for navigating long events), and carrying multiple audio mixes (original, commentary, music-only).
MKV also supports modern codecs that outperform AVCHD's H.264 encoding. Transcoding to H.265 or AV1 within MKV can reduce file sizes by 40-60% while maintaining or improving visual quality. For media library management, MKV's rich metadata and flexible structure make it the container of choice.
Common Use Cases
- Building Plex/Jellyfin libraries from AVCHD camcorder footage with proper metadata