FLV to VMS Converter

Extract VMS audio from FLV video clips online

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Built for Everyone

Whether you are a professional editor or a casual user, the converter is designed to be approachable with an interface anyone can navigate.

Audio Extraction

Pull the soundtrack from FLV video and save it as VMS. Keep the audio you need without the video weight — ideal for music and podcasts.

No Installation

The converter runs entirely in your web browser. No plugins, no apps, no downloads — just open convertio.tools and start converting immediately.

How to convert FLV 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

FLV (Flash Video) is a container format originally developed by Macromedia and later maintained by Adobe Systems after the 2005 acquisition. The format gained support for standalone playback with Flash Player 7 in 2003 and quickly became the dominant video format on the web, powering platforms like YouTube, Hulu, and Vimeo during the late 2000s. FLV files typically contain video encoded with the Sorenson Spark or VP6 codec alongside MP3 or ADPCM audio, wrapped in a lightweight proprietary container optimized for streaming delivery. The major strength of FLV was its ability to deliver consistent video playback across different operating systems and browsers through the ubiquitous Flash Player plugin, solving the fragmentation problem that plagued web video at the time. FLV files begin with a compact header followed by tagged data packets, a structure that enables fast seeking and efficient progressive download. The container supports embedded metadata with cue points, enabling interactive features like chapter navigation and timed events. FLV transformed online video from an unreliable niche experience into a mainstream medium, fundamentally reshaping entertainment, education, and communication on the internet. Although HTML5 video and modern codecs have replaced Flash-based delivery, FLV files remain in countless archives and legacy systems.
Developer: Adobe Systems
Initial release: 2003
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 should I convert FLV to VMS?

VMS is used in particular professional or legacy systems. Moving FLV audio to VMS ensures compatibility with applications that depend on this format.

What apps support VMS playback?

VMS opens in SoX and telephony systems that use VMS voice compression.

Do I need to install anything?

No downloads or plugins needed. The FLV to VMS converter runs entirely in your web browser — just visit convertio.tools and start converting.

Can I convert FLV to VMS on my phone?

The tool works on smartphones and tablets. Open convertio.tools in your mobile browser, upload the FLV, choose VMS, and download when done.

How long does FLV to VMS conversion take?

Conversion speed varies by file length and bitrate. Short FLV clips become VMS files in seconds, while longer recordings may take a few minutes.

Is the conversion private and secure?

Uploaded files are deleted immediately after conversion, and completed VMS downloads are removed from our servers within 24 hours for full privacy.