WMV to CVS Converter

Easily convert WMV audio to CVS format online

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WMV to CVS Online

Transform your WMV content into CVS directly in the browser. No desktop software, no complicated setup.

Privacy Protected

Your uploaded files are erased right after conversion. Converted results are automatically deleted within 24 hours.

Server-Side Processing

All audio encoding happens in the cloud. No CPU strain on your computer, no software downloads needed.

How to convert WMV to CVS

1

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

2

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

3

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

About formats

WMV (Windows Media Video) is a family of video codecs and associated file format developed by Microsoft, first introduced in 1999 as part of the Windows Media framework. The format encompasses several codec generations, from the original WMV 7 through WMV 9 (also standardized as VC-1 by SMPTE under the 421M specification). WMV files are typically contained within the ASF (Advanced Systems Format) wrapper and use the .wmv extension to indicate video content. WMV 9/VC-1 achieved compression efficiency comparable to early H.264 implementations, delivering good visual quality at moderate bit rates and earning adoption for HD DVD and Blu-ray disc content as an approved codec. The format was deeply integrated into the Windows operating system, Windows Media Player, and server-side streaming infrastructure, making it a natural choice for enterprise media delivery, corporate training videos, and Windows-centric web content throughout the 2000s. WMV supports features including interlaced video, multiple bit rate encoding for adaptive streaming, and digital rights management through Windows Media DRM. The Silverlight platform also used WMV as its primary video format for rich internet applications and streaming services. While the industry has largely moved to H.264 and HEVC for most applications, WMV remains present in legacy enterprise content management systems, archived media libraries, and workflows tied to the Windows Media ecosystem.
Developer: Microsoft
Initial release: 1999
CVS is a telephony audio encoding based on Continuously Variable Slope Delta modulation, representing voice through a 1-bit delta scheme where step size adapts to track input amplitude. Developed within CCITT (now ITU-T) standards during the 1970s, CVS encodes by comparing each sample to the previous one and outputting a single bit — up or down — with slope magnitude adjusting based on recent bit patterns. This yields extremely low bit rates, typically 16 kbps at 8 kHz sampling, efficient for narrowband voice over constrained channels. CVS files store signed delta-encoded data and are commonly processed using tools like SoX. A significant advantage is bandwidth economy: the 1-bit-per-sample approach demands minimal transmission capacity, essential for military radio links and early digital telephone infrastructure. The adaptive slope mechanism also prevents overload distortion on rapidly changing signals while keeping granular noise acceptable during quiet passages. Though modern wideband codecs have superseded CVS, it retains historical importance and niche utility in legacy telephony and embedded communication devices.
Developer: CCITT / ITU-T
Initial release: 1970

Frequently Asked Questions

Why convert WMV to CVS?

WMV has poor Mac, Linux, and mobile device support. Converting to CVS gives you CVSD telephony audio support and makes your content more accessible.

How do I open a CVS file?

For CVS playback, try telephony software or SoX for format conversion. All of these support the format natively or with minimal setup.

What devices can play CVS?

CVS playback requires compatible software on your desktop or laptop. Check the recommended apps above to find the right player for your system.

Is any software installation required?

No. The entire WMV to CVS conversion runs in your browser via convertio.tools. Nothing to download or install on your machine.

Can I convert multiple WMV to CVS at once?

Absolutely. Upload several WMV files and convert them all to CVS in one batch — each processes independently.

WMV to CVS Quality Rating

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