MPG to VMS Converter

Extract VMS voice audio from MPG video online

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Voice Messaging

VMS serves voice mail and messaging platforms. Extract speech content from MPG in a format these systems handle natively.

Remote Processing

Processing runs on our servers. Your device stays idle while the MPG to VMS conversion completes remotely.

Automatic Cleanup

Uploaded MPG files are deleted immediately. VMS outputs are removed from our servers within 24 hours.

How to convert MPG to VMS

1

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

2

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

3

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

About formats

MPG is a common file extension for video files encoded using the MPEG-1 or MPEG-2 compression standards, developed by the Moving Picture Experts Group. The three-character extension originated from early Windows and DOS file systems that restricted extensions to three characters, providing a shorthand for the longer MPEG designation. MPG files contain MPEG program streams that multiplex one video and one or more audio elementary streams into a unified byte stream with synchronization timestamps. The format was widely used throughout the 1990s and 2000s for storing digital video on personal computers, appearing in everything from Video CD rips and DVD extractions to digital TV recordings captured with hardware encoder cards. MPG files using MPEG-1 compression typically contain 352x240 (NTSC) or 352x288 (PAL) video at bit rates around 1.5 Mbps, while MPEG-2 encoded MPG files support higher resolutions up to full HD. The program stream structure assumes a relatively reliable storage medium, unlike the transport stream variant designed for broadcast, making it efficient for file-based playback without the overhead of error recovery packets. Broad compatibility is one of the enduring strengths of the format, as virtually every media player across all operating systems can decode these files without additional codec installation. MPG continues to be encountered in archived video content, surveillance recordings, and legacy digital video workflows.
Initial release: August 1993
VMS (Voice Messaging System) is a compressed audio format designed for telephony and voice mail applications, originally used in Germany. Files with the .vms extension encode spoken audio using Continuously Variable Slope Delta modulation (CVSD), a method suited to low-bandwidth voice transmission over telephone networks. The format operates at 8 kHz, matching the standard digital telephony sampling frequency, and produces self-describing files that embed encoding parameters within a short header. This header distinguishes VMS from raw CVSD streams, letting playback tools process recordings without external configuration. The SoX audio toolkit provides native read and write support, making it straightforward to convert VMS recordings into WAV or other modern formats. A practical advantage is the format's small file size — CVSD compression keeps voice mail messages compact enough for systems with limited disk capacity, which was critical in early telephony infrastructure. The encoding degrades gracefully under noisy channel conditions, preserving speech intelligibility even when errors occur. Although VMS has been superseded by modern codecs in current voice messaging platforms, it remains relevant for recovering legacy voice mail archives.
Developer: SoX Contributors
Initial release: 1991

Frequently Asked Questions

Why convert MPG to VMS?

VMS is used in voice messaging and mail systems. Converting extracts speech from MPG videos in a format compatible with these platforms.

What is VMS audio?

VMS is a voice mail format similar to DVMS, used in messaging infrastructure to store and deliver voice recordings.

What systems use VMS?

Voice mail servers, automated messaging systems, and certain PBX setups that support VMS-format audio for message storage.

Is VMS speech-only?

Yes — VMS is designed for voice frequencies and telephony-grade quality. For broader audio needs use WAV or MP3.

Can I batch convert?

Upload several MPG files and extract VMS audio from each simultaneously in one session.