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{{Short description|File format family}}
{{redirect|WMV|the container file format .wmv|Advanced Systems Format}}

'''Windows Media Video''' ('''WMV''') is a series of [[video codec]]s and their corresponding [[video coding format]]s developed by [[Microsoft]]. It is part of the [[Windows Media]] framework. WMV consists of three distinct codecs: the original video compression technology, known as ''WMV'', originally designed for Internet streaming applications as a competitor to [[RealVideo]], and ''WMV Screen'' and ''WMV Image'' compression technologies, which cater to specialized content. After standardization by the [[Society of Motion Picture and Television Engineers]] (SMPTE),<ref name="mssmpte">{{cite web|title=SMPTE VC-1 Receiving Industrywide Support|url=http://www.microsoft.com/presspass/press/2006/apr06/04-24VC1PR.mspx|url-status=dead|archive-url=https://web.archive.org/web/20070809134335/http://www.microsoft.com/presspass/press/2006/apr06/04-24VC1PR.mspx|archive-date=9 August 2007|access-date=3 May 2018|website=microsoft.com}}</ref><ref name="netanewssmpte">{{cite web|url=http://www.betanews.com/article/Microsoft_VC1_Codec_Now_a_Standard/1144097224|title=Microsoft VC-1 Codec Now a Standard|website=www.betanews.com|date=3 April 2006|access-date=3 May 2018|url-status=live|archive-url=https://web.archive.org/web/20090224074620/http://www.betanews.com/article/Microsoft_VC1_Codec_Now_a_Standard/1144097224|archive-date=24 February 2009}}</ref> WMV version 9 was adapted for physical-delivery formats such as {{nowrap|[[HD DVD]]}} and [[Blu-ray Disc]] and became known as {{nowrap|[[VC-1]]}}.<ref name="bluray">{{cite web|title=Blu-ray Disc BD-ROM Specification Adds Microsoft's VC-1 Advanced Video Codec|url=http://www.microsoft.com/presspass/press/2004/sep04/09-01BluRayDiscPR.mspx|url-status=dead|archive-url=https://web.archive.org/web/20070615115610/http://www.microsoft.com/presspass/press/2004/sep04/09-01BluRayDiscPR.mspx|archive-date=15 June 2007|access-date=3 May 2018|website=microsoft.com}}</ref><ref name="hddvd">{{cite web|title=Microsoft Technology Brings HD DVD to the Mainstream|url=http://www.microsoft.com/Presspass/press/2007/jan07/01-08HDDVDMomentumPR.mspx|url-status=dead|archive-url=https://web.archive.org/web/20070809152521/http://www.microsoft.com/presspass/press/2007/jan07/01-08HDDVDMomentumPR.mspx|archive-date=9 August 2007|access-date=3 May 2018|website=microsoft.com}}</ref> Microsoft also developed a [[digital container format]] called [[Advanced Systems Format]] to store video encoded by Windows Media Video.

==History==
In 2003, Microsoft drafted a [[video compression specification]] based on its WMV 9 format and submitted it to SMPTE for standardization. The standard was officially approved in March 2006 as SMPTE 421M, better known as [[VC-1]], thus making the WMV 9 format an open standard. VC-1 became one of the three video formats for the [[Blu-ray Disc|Blu-ray]] video disc, along with [[H.262/MPEG-2 Part 2]] and [[H.264/MPEG-4 AVC]].<ref name="bluray" /><ref name="hddvd" />

==Container format==
{{Main|Advanced Systems Format}}
[[File:WindowsMediaVideo.jpg|thumb|A screenshot from [[VLC media player|VLC Media Player]] of what a WMV file may contain]]
A ''WMV file'' uses the [[Advanced Systems Format]] (ASF) [[Container format (digital)|container format]] to encapsulate the encoded multimedia content. While the ASF can encapsulate multimedia in other encodings than those the WMV file standard specifies, those ASF files should use the {{mono|.asf}} [[file extension]] and not the {{mono|.wmv}} file extension.<ref name="asfwma">{{cite web|date=November 17, 2003|title=The Difference Between ASF and WMV/WMA Files|url=http://support.microsoft.com/kb/284094|url-status=dead|archive-url=https://web.archive.org/web/20070819113435/http://support.microsoft.com/kb/284094|archive-date=2007-08-19}}</ref>{{failed verification|date=August 2019}}

The ASF container can optionally support [[digital rights management]] using a combination of [[elliptic curve cryptography]] key exchange, [[Data Encryption Standard|DES]] block cipher, a custom block cipher, [[RC4 cipher|RC4]] stream cipher and the [[SHA-1]] hashing function.

Although WMV is generally packed into the ASF container format, it can also be put into the [[Matroska]]<ref>{{cite web|date=2003-06-19|title=Archives {{pipe}} Matroska|url=http://matroska.org/news/archives.html|url-status=dead|archive-url=https://web.archive.org/web/20111011142432/http://matroska.org/news/archives.html|archive-date=2011-10-11|access-date=2011-10-12|quote=As a sidenote, his muxer filter will also allow transmuxing of Microsoft WMV9 video files ( ASF/WMV container ) fine into matroska files, from Graphedit, and with WMV9 VCM installed on your PC you can even open and edit the files in latest VirtualdubMod}}</ref> container format (with file extension {{mono|.mkv}}), or [[Audio Video Interleave|AVI]] container format (extension {{mono|.avi}}). One common way to store WMV in an AVI file is to use the WMV 9 [[Video for Windows|Video Compression Manager (VCM)]] codec implementation.<ref>Microsoft Corporation (2003-07-07) [http://www.microsoft.com/downloads/details.aspx?FamilyID=0c99c648-5800-4aa3-a2fe-3de948689db8&DisplayLang=en Windows Media Video 9 VCM] {{webarchive|url=https://web.archive.org/web/20090810203658/http://www.microsoft.com/downloads/details.aspx?FamilyID=0c99c648-5800-4aa3-a2fe-3de948689db8&displaylang=en |date=2009-08-10 }}, Retrieved on 2009-08-07</ref><ref name="vcm">{{cite web|title=Windows - Official Site for Microsoft Windows 10 Home & Pro OS, laptops, PCs, tablets & more|url=http://www.microsoft.com/windows/windowsmedia/forpros/codecs/video.aspx#WindowsMediaVideo9VCM|url-status=dead|archive-url=https://web.archive.org/web/20171101052328/http://www.microsoft.com/windows/windowsmedia/forpros/codecs/video.aspx#WindowsMediaVideo9VCM|archive-date=1 November 2017|access-date=3 May 2018|website=www.microsoft.com}}</ref>

==Video compression formats==

===Windows Media Video===
[[Image:Common Video Resolutions 2.svg|thumb|Diagram illustrating the relative frame sizes of several common video resolutions targeted by Windows Media Video 9 Professional, starting with [[480p]]]]
Windows Media Video (WMV) is the most recognized [[video compression format]] within the WMV family. Usage of the term ''WMV'' often refers to the Microsoft Windows Media Video format only. Its main competitors are [[MPEG-4 AVC]], [[Audio Video Standard|AVS]], [[RealVideo]], and [[MPEG-4 Part 2|MPEG-4 ASP]]. The first version of the format, WMV 7, was introduced in 1999, and was built upon Microsoft's implementation of [[MPEG-4 Part 2]].<ref name="mpeg4wmv">{{cite web|title=News, Features, Reviews, Forums and Resources for the Professional Content Creator - Creative Planet Network|url=http://digitalcontentproducer.com/mag/video_mpeg_makes_scene/|url-status=dead|archive-url=https://web.archive.org/web/20090222024150/http://digitalcontentproducer.com/mag/video_mpeg_makes_scene/|archive-date=22 February 2009|access-date=3 May 2018|website=Creative Planet Network}}</ref> Continued proprietary development led to newer versions of the format, but the [[bit stream]] syntax was not frozen until WMV 9.<ref name="wmav9series">{{cite web|title=Windows Media Audio & Video 9 Series|url=http://download.microsoft.com/download/6/f/c/6fc03c60-5d5b-42c0-bcce-5e184fa56741/2_Audio_Video.ppt|url-status=dead|archive-url=https://web.archive.org/web/20070928022926/http://download.microsoft.com/download/6/f/c/6fc03c60-5d5b-42c0-bcce-5e184fa56741/2_Audio_Video.ppt|archive-date=28 September 2007|access-date=3 May 2018|website=microsoft.com}}</ref> While all versions of WMV support [[variable bit rate]], [[average bit rate]], and [[constant bit rate]], WMV 9 introduced several important features including native support for [[interlaced video]], non-square [[pixel]]s, and [[motion interpolation|frame interpolation]].<ref name="videoquality">{{cite web|title=Windows - Official Site for Microsoft Windows 10 Home & Pro OS, laptops, PCs, tablets & more|url=http://www.microsoft.com/windows/windowsmedia/demos/video_quality_demos.aspx|url-status=dead|archive-url=https://web.archive.org/web/20100821235549/http://www.microsoft.com/windows/windowsmedia/demos/video_quality_demos.aspx|archive-date=21 August 2010|access-date=3 May 2018|website=www.microsoft.com}}</ref> WMV 9 also introduced a new profile titled ''Windows Media Video 9 Professional'',<ref name="elimsrevguide">{{Cite web|url=http://www.elims.org/downloads/sample_content/9Series_RevGuide.pdf|archive-url=https://web.archive.org/web/20070928023100/http://www.elims.org/downloads/sample_content/9Series_RevGuide.pdf|url-status=dead|title=Windows Media 9 Series Beta Reviewer's Guide|archive-date=September 28, 2007}}</ref> which is activated automatically whenever the video resolution exceeds 300,000 pixels (e.g., 528 px × 576 px, 640 px × 480 px or 768 px × 432 px and beyond) and the bitrate 1 Mbit/s{{Citation needed|reason=where did this info come from, and why such a weird example rez originally? it's not anywhere in the linked document(s)|date=July 2009}}. It is targeted towards high-definition video content, at resolutions such as [[720p]] and [[1080p]].

The ''Simple'' and ''Main'' profile levels in WMV 9 are compliant with the same profile levels in the [[VC-1]] specification.<ref name="advancedprofile">{{Cite web|url=http://www.microsoft.com/windows/windowsmedia/howto/articles/codecadvancedsettings.aspx|archive-url=https://web.archive.org/web/20070811040550/http://www.microsoft.com/windows/windowsmedia/howto/articles/codecadvancedsettings.aspx|url-status=dead|title=Using the Advanced Settings of the Windows Media Video 9 Advanced Profile Codec|website=[[Microsoft]] |archive-date=August 11, 2007}}</ref> The ''Advanced Profile'' in VC-1 is implemented in a new WMV format called ''Windows Media Video 9 Advanced Profile''. It improves compression efficiency for interlaced content and is made transport-independent, making it able to be encapsulated in an [[MPEG transport stream]] or [[Real-time Transport Protocol|RTP]] packet format. The format is not compatible with previous WMV 9 formats, however.<ref name="streamingmedia">{{cite web|url=http://www.streamingmedia.com/Articles/ReadArticle.aspx?ArticleID=64909|title=Best Practices for Windows Media Encoding|first1=Ben|last1=Waggoner|date=21 February 2007|website=Streaming Media Magazine|access-date=3 May 2018|url-status=live|archive-url=https://web.archive.org/web/20110726005854/http://www.streamingmedia.com/Articles/ReadArticle.aspx?ArticleID=64909|archive-date=26 July 2011}}</ref>

WMV is a mandatory video format for [[PlaysForSure]]-certified online stores and devices, as well as [[Portable Media Center]] devices. The [[Microsoft Zune]], [[Xbox 360]], [[Windows Mobile]]-powered devices with Windows Media Player, as well as many uncertified devices, support the format.<ref name="winmobilefaq">{{cite web|title=Windows - Official Site for Microsoft Windows 10 Home & Pro OS, laptops, PCs, tablets & more|url=http://www.microsoft.com/windows/windowsmedia/player/windowsmobile/faq.aspx|url-status=dead|archive-url=https://web.archive.org/web/20070914112132/http://www.microsoft.com/windows/windowsmedia/player/windowsmobile/faq.aspx|archive-date=14 September 2007|access-date=3 May 2018|website=www.microsoft.com}}</ref> [[WMV HD]] mandates the use of WMV 9 for its certification program, at quality levels specified by Microsoft.<ref name="wmvhd">{{cite web|title=MSN - Outlook, Office, Skype, Bing, Breaking News, and Latest Videos|url=http://go.microsoft.com/fwlink/?LinkId=41932|url-status=dead|archive-url=https://web.archive.org/web/20051020113823/http://download.microsoft.com/download/0/7/e/07e701c3-2875-46be-9418-9c6591c46eb8/wmvhdencoding.DOC|archive-date=October 20, 2005|access-date=3 May 2018|website=go.microsoft.com}}</ref> WMV used to be the only supported video format for the [[Microsoft Silverlight]] platform, but the H.264 format is now also supported starting with version 3.<ref name="silverlightfaq">{{cite web|title=Microsoft Silverlight Developer Server Audio Video Streaming FAQ|url=http://www.microsoft.com/silverlight/faq.aspx|url-status=dead|archive-url=https://web.archive.org/web/20070904060106/http://www.microsoft.com/silverlight/faq.aspx|archive-date=4 September 2007|access-date=3 May 2018|website=microsoft.com}}</ref>

=== Windows Media Video Screen ===
Windows Media Video Screen (WMV Screen) are video formats that specialise in [[screencast]] content. They can capture live screen content, or convert video from third-party screen-capture programs into WMV 9 Screen files. They work best when the source material is mainly static and contains a small color [[palette (computing)|palette]].<ref name="screen">{{cite web|title=Windows - Official Site for Microsoft Windows 10 Home & Pro OS, laptops, PCs, tablets & more|url=http://www.microsoft.com/windows/windowsmedia/forpros/codecs/video.aspx#WindowsMediaVideo9Screen|url-status=dead|archive-url=https://web.archive.org/web/20171101052328/http://www.microsoft.com/windows/windowsmedia/forpros/codecs/video.aspx#WindowsMediaVideo9Screen|archive-date=1 November 2017|access-date=3 May 2018|website=www.microsoft.com}}</ref>

One of the uses for the format is computer step-by-step demonstration videos. The first version of the format was WMV 7 Screen. The second version, WMV 9 Screen, supports VBR encoding in addition to CBR.<ref name="screen" /> Additionally there is MSA1 (aka “MS ATC Screen codec” or “MSS3”) which is used in [[Microsoft Office Live Meeting#Live Meeting 2007|Live Meeting]] 2007. [[FourCC]]s for the formats are <code>MSS1</code>, <code>MSS2</code> and <code>MSA1</code>.<ref>{{cite web|url=http://wiki.multimedia.cx/?title=Microsoft_Screen_Codec|title=Microsoft Screen Codec - MultimediaWiki|website=wiki.multimedia.cx|access-date=3 May 2018|url-status=live|archive-url=https://web.archive.org/web/20130515053029/http://wiki.multimedia.cx/?title=Microsoft_Screen_Codec|archive-date=15 May 2013}}</ref>

===Windows Media Video Image===

Windows Media Video Image (WMV Image) is a video [[slideshow]] format. The format works by applying timing, [[panning (camera)|panning]] and transition effects to a series of images during playback.<ref name="image">{{cite web|title=Windows - Official Site for Microsoft Windows 10 Home & Pro OS, laptops, PCs, tablets & more|url=http://www.microsoft.com/windows/windowsmedia/forpros/codecs/video.aspx#WindowsMediaVideo9ImageVersion2|url-status=dead|archive-url=https://web.archive.org/web/20171101052328/http://www.microsoft.com/windows/windowsmedia/forpros/codecs/video.aspx#WindowsMediaVideo9ImageVersion2|archive-date=1 November 2017|access-date=3 May 2018|website=www.microsoft.com}}</ref> The codec achieves a higher compression ratio and image quality than WMV 9 for still images as files encoded with WMV Image store static images rather than full-motion video.

Since the format relies on the decoder (player) to generate video frames in real-time, playing WMV Image files even at moderate resolutions (e.g. 30 [[frames per second]] at 1024 px × 768 px resolution) requires heavy computer processing. The latest version of the format, WMV 9.1 Image, used by [[Photo Story]] 3, features additional transformation effects, but is not compatible with the original WMV 9 Image format.<ref name="image" />

Hardware support for WMV Image is available from Portable Media Centers, [[Windows Mobile]]-powered devices with Windows Media Player 10 Mobile.<ref name="winmobilefaq" />

Since no known domestic DVD player supports this format, users of Photo Story 3 wishing to generate material capable of being played in a DVD player will first have to convert to [[MPEG-2]] before burning a DVD (average file sizes in MPEG-2 are 5 to 6 times the .wmv file).

===Versions===
{| class="wikitable"
|-
! Public Name
! [[FourCC]]
! Description
|-
| Microsoft MPEG-4 version 1
| MPG4
| [[Video for Windows]]-based codec. Non-standard MPEG-4 codec incompatible with the later standardized version of [[MPEG-4 Part 2]].
|-
| Microsoft MPEG-4 version 2
| MP42
| VfW-based codec. Non-compliant with finalized MPEG-4 part 2 standard.
|-
| Microsoft MPEG-4 version 3
| MP43
| VfW-based codec. Non-compliant with finalized MPEG-4 part 2 standard. Eventually locked for encoding only with ASF files (build 3688 and earlier could also encode to AVI).<ref>VirtualDub [https://www.virtualdub.org/docs_codecs.html VirtualDub documentation: codecs] {{webarchive|url=https://web.archive.org/web/20110516013426/http://www.virtualdub.org/docs_codecs.html |date=2011-05-16 }}, Retrieved on 2009-11-28</ref>
|-
| Microsoft ISO MPEG-4 version 1
| MP4S
| [[DirectX Media Objects]] (DMO)-based codec. MPEG-4 [[MPEG-4 Part 2#Simple Profile .28SP.29|Simple Profile]] compliant.
|-
| Microsoft ISO MPEG-4 version 1.1
| M4S2
| MPEG-4 [[MPEG-4 Part 2#Advanced Simple Profile (ASP)|Advanced Simple Profile]] compliant.<ref>MPEG4 Part 2 Video Decoder [http://msdn.microsoft.com/en-us/library/dd756559%28VS.85%29.aspx MSDN documentation: Profiles and Levels] {{webarchive|url=https://web.archive.org/web/20131203004213/http://msdn.microsoft.com/en-us/library/dd756559(VS.85).aspx |date=2013-12-03 }}, Retrieved on 2009-11-28</ref>
|-
| Windows Media Video 7
| WMV1
| DirectX Media Objects|DMO-based codec.
|-
| Windows Media Screen 7
| MSS1
| DMO-based codec. Optimized for low-bitrate sequential screen captures or screencasts. Deprecated in favor of Windows Media 9 Screen codec.
|-
| Windows Media Video 8
| WMV2
| DMO-based codec.
|-
| Windows Media Video 9
| WMV3
| DMO-based codec. Video for Windows (VfW/VCM) version also available. [https://web.archive.org/web/20060113033757/http://www.microsoft.com/downloads/details.aspx?FamilyID=0c99c648-5800-4aa3-a2fe-3de948689db8&displaylang=en]
|-
| Windows Media Video 9 Screen
| MSS2
| DMO-based codec. Optimized for low-bitrate sequential screen captures or screencasts.
|-
| Windows Media Video 9.1 Image
| WMVP
| DMO-based codec. Optimized for encoding video from sequential bitmap images. Used, for instance, by Photo Story.
|-
| Windows Media Video 9.1 Image V2
| WVP2
| DMO-based codec. Optimized for encoding video from sequential bitmap images. Used, for instance, by Photo Story.
|-
| Windows Media Video 9 Advanced Profile
| WMVA
| DMO-based codec. Deprecated as non-VC-1-compliant.
|-
| Windows Media Video 9 Advanced Profile
| WVC1
| DMO-based codec. VC-1 compliant format.
|}

==Audio compression formats==
The audio format used in conjunction with Windows Media Video is typically some version of [[Windows Media Audio]], or in rarer cases, the deprecated Sipro [[ACELP|ACELP.net]] audio format. Microsoft recommends that ASF files containing non-Windows Media formats use the generic {{mono|.ASF}} file extension.

==Players==
Software that can play WMV files includes [[Windows Media Player]], [[RealPlayer]], [[MPlayer]], [[Media Player Classic]], [[VLC Media Player]] and [[K-Multimedia Player]]. The Microsoft Zune media management software supports the WMV format, but uses a Zune-specific variation of [[Windows Media DRM]] which is used by PlaysForSure. Many third-party players exist for various platforms such as [[Linux]] that use the [[FFmpeg]] implementation of the WMV format.

On the [[Mac (computer)|Macintosh]] platform, Microsoft released a [[PowerPC]] version of Windows Media Player for [[Mac OS X]] in 2003,<ref name="wmp9mac">{{cite web|title=Office 365 for Mac, Office 2016 for Mac|url=https://products.office.com/en-US/mac?pid=download&location=/mac/download/misc/winmp_osx.xml&secid=80&ssid=8&flgnosysreq=True|url-status=dead|archive-url=https://web.archive.org/web/20180503013327/https://products.office.com/en-US/mac?pid=download&location=%2Fmac%2Fdownload%2Fmisc%2Fwinmp_osx.xml&secid=80&ssid=8&flgnosysreq=True|archive-date=3 May 2018|access-date=3 May 2018|website=office.com}}</ref> but further development of the software ceased. From January 2006 to May 2014, Microsoft endorsed and distributed the 3rd party [[Flip4Mac]], a [[QuickTime]] Component developed by [[Telestream]] that allowed Macintosh users to play WMV files in any player that used the QuickTime framework.<ref name="flip4mac">{{cite web|title=Telestream Press Release|url=http://www.telestream.net/news/06_01_10.htm|url-status=dead|archive-url=https://web.archive.org/web/20060910194332/http://www.telestream.net/news/06_01_10.htm|archive-date=10 September 2006|access-date=10 September 2006|website=telestream.net}}</ref><ref name="flip4mackbcharge">{{cite web|title=Knowledge Article: Flip4Mac Player: Why is Telestream charging for Flip4Mac Player|url=https://telestream.secure.force.com/kb/articles/Knowledge_Article/Why-isTelestream-charging-for-Flip4Mac-Player/?l=en_US&fs=RelatedArticle|url-status=live|archive-url=https://web.archive.org/web/20210822181814/https://telestream.secure.force.com/kb/articles/Knowledge_Article/Why-isTelestream-charging-for-Flip4Mac-Player/?l=en_US&fs=RelatedArticle|archive-date=22 August 2021|access-date=22 August 2021}}</ref> Telestream ended sales of Flip4Mac on 1 July 2019 and officially ended support on 28 June 2020.<ref name="flip4maceol">{{cite web|title=Knowledge Article: Flip4Mac retired as of July 1, 2019|url=https://telestream.secure.force.com/kb/articles/Knowledge_Article/Flip4Mac-retired-as-of-July-1-2019|url-status=live|archive-url=https://web.archive.org/web/20210822180145/https://telestream.secure.force.com/kb/articles/Knowledge_Article/Flip4Mac-retired-as-of-July-1-2019|archive-date=22 August 2021|access-date=22 August 2021}}</ref> The Elmedia player, which can play WMV files on Macintosh computers, is still available.

==Encoders==
Many programs can export video in WMV format; a few examples are [[Windows Movie Maker]], [[Windows Media Encoder]], [[Microsoft Expression Encoder]], [[Sorenson Squeeze]],<ref name="sorensonmedia">{{cite web|title=Sorenson Media - Next Generation Television Starts Here|url=http://sorensonmedia.com|url-status=dead|archive-url=https://web.archive.org/web/20180323052423/https://www.sorensonmedia.com/|archive-date=23 March 2018|access-date=3 May 2018|website=Sorenson Media}}</ref> [[Vegas Pro]],<ref name="vegas pro">{{cite web|title=Sony Creative Software - Vegas Pro 8 - Technical Specifications|url=http://www.sonycreativesoftware.com/products/product.asp?PID=457&PageID=107|url-status=dead|archive-url=https://web.archive.org/web/20080302001832/http://www.sonycreativesoftware.com/products/product.asp?PID=457&PageID=107|archive-date=2 March 2008|access-date=3 May 2018|website=sonycreativesoftware.com}}</ref> [[AVS Video Editor]], [[VSDC Free Video Editor]], [[Telestream Episode]], [[Telestream FlipFactory]],<ref name="premiere">{{cite web|title=Supported file formats in Adobe Premiere Pro 2.0|url=http://kb.adobe.com/selfservice/viewContent.do?externalId=332612|url-status=dead|archive-url=https://web.archive.org/web/20071013122312/http://kb.adobe.com/selfservice/viewContent.do?externalId=332612|archive-date=13 October 2007|access-date=3 May 2018|website=adobe.com}}</ref><ref name="Easy Ingest">{{cite web|url=http://www.easymediasuite.com|title=EMS - PLAYOUT - CG - MAM - INGEST - ENCODER - IP MULTIVIEWER|website=www.easymediasuite.com|access-date=3 May 2018|url-status=live|archive-url=https://web.archive.org/web/20170930085002/http://www.easymediasuite.com/|archive-date=30 September 2017}}</ref> and [[FFmpeg]].

Programs that encode using the WMV Image format include [[Windows Media Encoder]], [[AVS Video Editor]], and [[Photo Story]].

==Digital rights management==
{{Main|Windows Media DRM}}
While none of the WMV formats themselves contain any [[digital rights management]] facilities, the ASF container format, in which a WMV stream may be encapsulated, can. Windows Media DRM, which can be used in conjunction with WMV, supports time-limited subscription video services such as those offered by [[CinemaNow]].<ref name="cinemanow">{{cite web|title=Windows - Official Site for Microsoft Windows 10 Home & Pro OS, laptops, PCs, tablets & more|url=http://www.playsforsure.com/ItemDetail.aspx?id=26|url-status=dead|archive-url=https://web.archive.org/web/20070822181259/http://www.playsforsure.com/ItemDetail.aspx?id=26|archive-date=22 August 2007|access-date=3 May 2018|website=www.playsforsure.com}}</ref> Windows Media DRM, a component of PlaysForSure and [[Windows Media Connect]], is supported on many modern portable video devices and streaming media clients such as the Xbox 360.

==Criticism==
WMV has been the subject of numerous complaints from users and the press. Users dislike the digital rights management system which is sometimes attached to WMV files.<ref name="inquirerrights">{{cite web|url=https://www.theinquirer.net/default.aspx?article=34523|title=Microsoft Media Player shreds your rights|website=theinquirer.net|access-date=3 May 2018|url-status=unfit|archive-url=https://web.archive.org/web/20070907023902/http://www.theinquirer.net/default.aspx?article=34523|archive-date=7 September 2007}}</ref> In 2007, the loss of the ability to restore licenses for WMV files in the Windows Media Player 11 was not positively received.<ref name="inquirerrights" />

==See also==
* [[JPEG XR|JPEG XR/HDHD]], an image file format and format developed by Microsoft

==References==
{{reflist|colwidth=30em}}

==External links==
{{Commons category}}
*[https://www.spinnaker.com/crypt/drm/freeme/Technical Description of the algorithm used for Windows Media encryption] {{Webarchive|url=https://web.archive.org/web/20130210012154/http://www.spinnaker.com/crypt/drm/freeme/Technical |date=2013-02-10 }}
*[https://on10.net/Blogs/benwagg/elephants-dream-720p--2-mbps/ Demonstration of WMV 9 delivering 720p video at 1.8 Mbit/s ABR] {{Webarchive|url=https://web.archive.org/web/20100322203116/http://on10.net/Blogs/benwagg/elephants-dream-720p--2-mbps/ |date=2010-03-22 }}
*[https://web.archive.org/web/20071224194356/http://on10.net/Blogs/benwagg/elephants-dream-sample/Default.aspx Demonstration of WMV 9 delivering 1080p video at 10 Mbit/s ABR]
*[https://web.archive.org/web/20090418134328/http://software-history.org/?p=3 History of Windows Media Player] (archived 2009)

{{Compression formats}}
{{Compression Software Implementations}}

[[Category:Video codecs]]
[[Category:Microsoft proprietary codecs]]
[[Category:Microsoft Windows multimedia technology]]
[[Category:Digital rights management systems]]

Windows Media Video - Revision history

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