MKV to DVMS Converter

Extract DVMS voice audio from MKV video files online

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

Telephony Format

DVMS is designed for voice mail and telephony. Extract MKV audio in the format that voice messaging infrastructure expects.

Rapid Processing

Audio extraction skips video encoding entirely. MKV to DVMS conversion finishes in seconds on the server.

Data Privacy

MKV uploads are purged after conversion. DVMS output files are deleted within 24 hours — secure handling by default.

How to convert MKV to DVMS

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose dvms or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your dvms file right afterwards

About formats

MKV (Matroska Video) is an open-standard multimedia container format developed by the Matroska project, which announced the format in December 2002. Named after the Russian matryoshka nesting dolls, the format is built on the Extensible Binary Meta Language (EBML), a simplified binary variant of XML that provides a flexible and forward-compatible structure. MKV can hold virtually unlimited numbers of video, audio, and subtitle tracks within a single file, supporting codecs from H.264 and HEVC to VP9 and AV1 for video, and AAC, FLAC, Opus, and DTS for audio. A standout feature is comprehensive subtitle support, handling formats from simple SRT text to complex ASS styled subtitles and bitmap-based PGS tracks from Blu-ray discs. MKV also supports chapter markers, attachments (such as fonts needed for styled subtitles), and tagging metadata, making it one of the most feature-rich containers available. The open specification ensures that any developer can implement MKV reading and writing without licensing fees, which has driven widespread adoption across media players, streaming tools, and encoding software. The ability to encapsulate virtually any codec combination in a single, well-organized file has made MKV the preferred container for high-quality video distribution, archival, and personal media libraries.
Developer: Matroska
Initial release: December 6, 2002
DVMS (Dutch Voice Messaging System) is a telephony-grade audio encoding born from the Netherlands' early push toward digital voicemail infrastructure. Deployed through KPN (formerly PTT Telecom) in the mid-1980s, the format stores mono voice data at a narrow 8 kHz sample rate, prioritizing compact message size over sonic breadth. Audio is compressed with a proprietary variant of logarithmic companding similar to European A-law encoding, squeezing recordings to roughly 8 kbit/s while keeping speech intelligible. Each file carries a small header identifying sample rate, compression type, and message metadata, which made automated routing across early PBX and voicemail systems straightforward. Although DVMS never gained traction outside Dutch telecom circles, it influenced how European carriers designed later voice messaging protocols. Tools like SoX and several legacy telephony libraries still read and write DVMS files, allowing archival playback of decades-old messages. Among its practical advantages: extremely small file sizes (a one-minute message occupies roughly 60 KB), reliable speech clarity despite aggressive compression, and a simple container layout that is easy to parse programmatically.
Developer: Dutch PTT Telecom
Initial release: 1984

Frequently Asked Questions

Why convert MKV to DVMS?

DVMS is used in voice mail and telephony systems. Converting MKV audio to DVMS produces files compatible with those specialized platforms.

What opens DVMS files?

SoX processes DVMS on modern computers. Voice mail servers and telephony equipment that support DVMS also handle the format natively.

Is DVMS a voice-only format?

Yes — DVMS is optimized for speech in telephony contexts. It is not intended for music or high-fidelity audio reproduction.

How compact are DVMS files?

DVMS uses efficient voice encoding. Files are compact because the format is tuned for narrow-bandwidth speech, not full-range audio.

Is the conversion done in the cloud?

Entirely — convertio.tools handles all processing remotely. Upload the MKV and download the DVMS output from any device.

MKV to DVMS Quality Rating

5.0 (1 votes)
You need to convert and download at least 1 file to provide feedback!