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M4V ASF
File conversion

Convert M4V to ASF

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Verified by Adam B.· reviewed by FE Editorial ·updated Jul 31, 2026
QUICK ANSWER
Is it possible to convert M4V to ASF?
Yes - M4V converts to ASF.

You can do it right here with our free converter - no sign-up, and your file is deleted right after.

The fastest path is our free converter above or FFmpeg on the command line. The key caveat: this is a full transcode, not a remux - expect some quality loss, and DRM-protected iTunes purchases cannot be converted by any tool.

7 programs
Also to ASF: AMV

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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M4V → ASF converterFREE
Drop a .M4V file here
or pick one - we convert it to .ASF and give you the file to download

Why convert M4V to ASF?

.ASF (Advanced Systems Format) is Microsoft's container for WMV and WMA streams, dominant on Windows in the early 2000s. A number of corporate media systems, older digital signage players, and embedded Windows CE devices still require video in ASF format. Converting M4V to ASF satisfies those legacy requirements when the target system cannot be changed.

How to convert M4V to ASF

Command line - FFmpeg CLI

Run ffmpeg -i input.m4v -c:v wmv2 -c:a wmav2 output.asf to transcode to WMV2 video and WMA audio inside an ASF container.

VLC FREE

Use Media > Convert/Save, configure an ASF/WMV encapsulation profile with WMV2 video and WMA audio, and export your .m4v to .asf.

Movavi Video Converter PAID

Add your .m4v to Movavi Video Converter, select WMV or ASF as the output format, and click Convert.

SUPER FREE

Set the output container to ASF and video codec to WMV in SUPER's interface, load your .m4v, and encode.

Programs that convert M4V

Adobe Premiere Pro
Adobe Soundbooth
Aimersoft DRM Media Converter for Windows
Movavi Video Converter Personal
SUPER
Aimersoft Video Converter for Mac
Movavi Video Converter for Mac Personal

About these formats

.M4V iTunes Video File

An M4V file is an iTunes/Apple TV video - movies, TV shows, and music videos sold or rented through Apple's store. Non-DRM M4V files open in VLC, Windows Media Player, or QuickTime.…

Open .M4V details →
.ASF Advanced Systems Format

An ASF file is Microsoft's Advanced Systems Format container - the same format that underlies Windows Media Video (.wmv) and Windows Media Audio (.wma). On Windows, double-click it and…

Open .ASF details →

Quality & what to watch

  • DRM-protected .m4v files (purchased iTunes or Apple TV titles) carry Apple FairPlay encryption - FFmpeg, VLC, and all standard converters will fail to read them.
  • The conversion is a full transcode: WMV is less compression-efficient than H.264, so the output .asf file is often larger than the original at the same visual quality.
  • iTunes metadata, chapter marks, and cover art stored in the .m4v container have no equivalent in ASF and are lost during conversion.

Frequently asked questions

Can I rename a .m4v file to .asf to make it work?
No - .m4v uses the MP4 container with H.264 and AAC, while .asf requires WMV video and WMA audio. Renaming produces a file Windows Media Player cannot open.
Does Windows Media Player support ASF files?
Yes, ASF is the native Windows Media container. All versions from WMP 6 through WMP 12 (Windows 11) open .asf files without extra codecs.
Can I convert a DRM-protected M4V to ASF?
No - Apple FairPlay DRM prevents standard tools from reading the video stream, and removing it is legally restricted in most countries.
Why is my output ASF file larger than the original M4V?
WMV achieves lower compression than H.264 at equivalent quality. Lower the video bitrate in FFmpeg with -b:v 1500k to reduce size, accepting a small quality trade-off.