AVI to DVMS Converter

Extract AVI audio as DVMS voice messaging format online

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Voice Messaging

Extract AVI audio into DVMS format — built for voice messaging systems and legacy voicemail infrastructure that expects this specific encoding.

Web-Based Process

No legacy voicemail hardware or PBX software needed. Convert AVI audio to DVMS from any browser in a straightforward process.

Privacy First

AVI files are deleted after processing. DVMS output is purged within 24 hours — voice messaging content stays private and secure.

How to convert AVI 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

AVI (Audio Video Interleave) is one of the oldest and most recognized multimedia container formats, introduced by Microsoft in November 1992 as part of its Video for Windows technology. Built on the Resource Interchange File Format (RIFF) structure, AVI interleaves audio and video data in alternating chunks, allowing synchronized playback without requiring sophisticated stream management. The format is codec-agnostic, meaning it can hold video compressed with virtually any codec, from early Cinepak and Indeo to modern DivX, Xvid, and H.264 streams. This flexibility contributed to widespread adoption across personal computers throughout the 1990s and 2000s. One notable characteristic is a straightforward internal structure that makes AVI files relatively easy to edit and process at the binary level compared to more complex modern containers. AVI also supports multiple audio streams, enabling multilingual content within a single file. However, the original specification has limitations, including a 2 GB file size ceiling in older implementations and no native support for variable frame rates or advanced subtitle formats. The OpenDML extensions (AVI 2.0) addressed the size limitation by allowing files to exceed the original boundary. Despite being decades old, AVI remains one of the most universally recognized multimedia formats and is still widely supported by media players and editing tools across all major operating systems.
Developer: Microsoft
Initial release: November 10, 1992
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 AVI to DVMS?

DVMS is a voice messaging format used in legacy voicemail and telecommunications. Converting AVI audio serves systems that require this specific format.

What systems use DVMS?

Legacy voicemail platforms, DVMS-compatible PBX systems, and SOX audio processing utility handle DVMS format audio files.

Is DVMS a voice-only format?

DVMS is designed for voice messaging. It uses compression suited to speech frequencies — optimized for intelligibility over musicality.

Can modern tools process DVMS?

SOX is the primary modern tool for DVMS processing. It reads and writes DVMS files on any contemporary operating system.

Does this extract only audio?

Only the audio track from your AVI is extracted and converted. The video content is discarded, producing a pure voice audio file.