Difference between revisions of "Windows Media"

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:''See also [[Windows Media Player]]''
 
{{wikipedia|Windows Media Video}}
 
{{wikipedia|Windows Media Video}}
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'''Windows Media Video''' (WMV) is a generic name for the set of proprietary streaming video technologies developed by Microsoft. It is part of the Windows Media framework.
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'''Windows Media''' is a generic name for the set of proprietary streaming audio and video technologies developed by Microsoft. It includes the '''Windows Media Video''' (WMV) and '''Windows Media Audio''' (WMA) codecs.
  
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WMV is not built solely on Microsoft in-house technology. From version 7 (WMV1), Microsoft has used its own non-standard version of MPEG-4 Part 2. The video stream is often combined with an audio stream of Windows Media Audio.
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Windows Media Video is not built solely on Microsoft in-house technology. From version 7 (WMV1), Microsoft has used its own non-standard version of [[MPEG-4]] Part 2.
  
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WMV files are played by players such as MPlayer or Windows Media Player, the latter being only available for Microsoft Windows and Macintosh systems. Many third-party players exist for various platforms such as Linux that use the FFmpeg implementation of the WMV codecs.
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Windows Media is often generated using Microsoft's proprietary Windows Media Video 9 VCM software for Windows.  
  
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Raw WMV video is packed into an AVI or Advanced Streaming Format (ASF) container. The resulting files may be named .avi if it is an AVI-contained file, or .wmv or .asf if it is an ASF file, but .wmv files are to be ASF files with audio/video content only.
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Microsoft has submitted Version 9 codec to the [[wikipedia:Society of Motion Picture and Television Engineers|Society of Motion Picture and Television Engineers]] (SMPTE), for approval as an international standard. The Trial version of standards were published by SMPTE in September 2005. A reference decoder implementation and test sequences are also available. This codec is used to distribute high definition video on standard DVDs in a format Microsoft has branded as '''WMV HD''', which can be played back on computers or compatible DVD players.
  
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WMV is found in the AVI file container when encoded with Microsoft's proprietory Windows Media Video 9 VCM software for Windows. Microsoft's Windows Media Player for the Mac does not support all WMV encoded files since it supports only the ASF file container.
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== Encoding ==
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You can encode audio to WMA format with following command
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{{%}} vlc input.wav :sout="#transcode{acodec=wma2,ab=128,channels=2,samplerate=44100}:std{access=file,mux=asf,dst=output.wma}"
  
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WMV includes digital rights management facilities intended to protect intellectual property rights.
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You can encode video and audio to WMV format with following command
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{{%}} vlc input.avi :sout="#transcode{vcodec=WMV2,width=720,vb=1200,height=576,acodec=wma2,ab=128,channels=2}:std{access=file,mux=asf,dst=output.wmv}"
  
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Microsoft has submitted Version 9 codec to the Society of Motion Picture and Television Engineers (SMPTE), for approval as an international standard. (As of Jan 2005, the SMPTE is reviewing the submission under the draft-name "VC-1"). This codec is also used to distribute high definition video on standard DVDs in a format Microsoft has branded as WMV HD. This WMV HD content can be played back on computers or compatible DVD players.
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== Container ==
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Windows Media files use the [[ASF]] container. They generally have the file extension '''.wmv''', '''.wma''', '''.wm''' or '''.asf'''.
  
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The Trial version of standards were published by SMPTE in September 2005. A reference decoder implementation and test sequences are also available.
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Windows Media codecs can also be used inside [[AVI]] files.
  
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== Compatability ==
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=== Codecs used in WMV files ===
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See next paragraph for more information on codecs in WMV files.
  
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WMV3, the Video part of Windows Media 9, is not supported in VLC. However there are some fixes.
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== Codecs ==
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{{codec video|id=WMV3|altid=WMV|for=Windows Media}}
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{{codec video|id=WMV2|altid=WMV|for=Windows Media}}
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{{codec audio|id=WMA2|altid=WMA|for=Windows Media}}
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Windows Media often uses special native codecs for '''Windows Media Video''' and '''Windows Media Audio'''. WMV3 is often called "Windows Media 9".
  
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If you're using Windows and have Windows Media Player 9/10 installed, VLC should be able to play these files, by using Microsoft's own files. Or, if you're using Linux, see the [[common problems]] page for a workarround.
 
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=== Codecs used in WMV containers ===
 
 
{| class="wikitable"
 
{| class="wikitable"
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! [[Fourcc]] !! [[Codec]] !! Supported by VLC?
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! scope="col" | [[Fourcc]] !! scope="col" | [[Codec]] !! scope="col" | Supported by VLC? !! scope="col" | Comments
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|-
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| MP43 || [[MPEG-4]] || {{Up-to-date}} ||
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|-
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| WMV1 ||Windows Media Video v7 || {{Up-to-date}} ||
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|-
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| WMV2 || Windows Media Video v8 || {{Up-to-date}} || Not totally implemented for rare files. Please send the files.
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|-
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| WMV3 || Windows Media Video 9 (v3) || {{Up-to-date}} || Not totally implemented for rare files (VBR). Please send the files.
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|-
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| WVC1, WMVA || Windows Media Video 9 Advanced Profile || {{Up-to-date}} || Not totally implemented for rare files (VBR, interlacing). Please send the files.
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|-
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| WMVP || Windows Media Video 9 Image || {{Up-to-date}} || VLC 2.0 or through [[dmo]] for older versions
 
|-
 
|-
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| MP43 || [[MPEG-4]] || Yes
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| WVP2 || Windows Media Video 9.1 Image (v2) || {{Up-to-date}} || VLC 2.0 or through [[dmo]] for older versions
 
|-
 
|-
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| MSS2 || || No
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| MSS1 || Windows Media Screen v7 || {{Up-to-date}} || with [[dmo]] ONLY
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|-
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| MSS2 || Windows Media Video 9 screen codec || {{Up-to-date}} || with [[dmo]] ONLY
 
|-
 
|-
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| WMV3 || Windows Media Video 3 || Yes
 
 
|}
 
|}
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More info on [http://msdn2.microsoft.com/en-us/library/bb331872.aspx MSDN]
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== Compatibility ==
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=== Protected content ===
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Windows Media files may contain [[Digital Restrictions Management]] (DRM) facilities intended to protect copyrights. VLC does not play any DRM'd files.
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=== Windows Media Video 3 ===
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WMV3, the Video part of Windows Media 9, is supported in VLC since version 0.8.6. Upgrade to the latest version ({{VLC:latest version}}) to play WMV files.
 +
 +
If you are unable to upgrade, there are still some fixes. If you're using Windows and have Windows Media Player 9/10 installed, VLC should be able to play these files, by using Microsoft's own files. Or, if you're using Linux, see the [[Common Problems]] page for a workaround.
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=== On Windows Media Player (Mac) ===
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Microsoft's Windows Media Player for the Mac does not support all WMV encoded files since it supports only the ASF file container.{{check}}
 +
 +
[[Category:Windows]]

Latest revision as of 22:03, 17 March 2019

See also Windows Media Player
Wikipedia has information on this entry:
Windows Media Video

Windows Media is a generic name for the set of proprietary streaming audio and video technologies developed by Microsoft. It includes the Windows Media Video (WMV) and Windows Media Audio (WMA) codecs.

Windows Media Video is not built solely on Microsoft in-house technology. From version 7 (WMV1), Microsoft has used its own non-standard version of MPEG-4 Part 2.

Windows Media is often generated using Microsoft's proprietary Windows Media Video 9 VCM software for Windows.

Microsoft has submitted Version 9 codec to the Society of Motion Picture and Television Engineers (SMPTE), for approval as an international standard. The Trial version of standards were published by SMPTE in September 2005. A reference decoder implementation and test sequences are also available. This codec is used to distribute high definition video on standard DVDs in a format Microsoft has branded as WMV HD, which can be played back on computers or compatible DVD players.

Encoding

You can encode audio to WMA format with following command 

% vlc input.wav :sout="#transcode{acodec=wma2,ab=128,channels=2,samplerate=44100}:std{access=file,mux=asf,dst=output.wma}"

You can encode video and audio to WMV format with following command 

% vlc input.avi :sout="#transcode{vcodec=WMV2,width=720,vb=1200,height=576,acodec=wma2,ab=128,channels=2}:std{access=file,mux=asf,dst=output.wmv}"

Container

Windows Media files use the ASF container. They generally have the file extension .wmv, .wma, .wm or .asf.

Windows Media codecs can also be used inside AVI files.

Codecs used in WMV files

See next paragraph for more information on codecs in WMV files.

Codecs

WMV3
 This is a video codec. The name to use at the command line is WMV3, but you can also use WMV.
This codec can be used inside the Windows Media containers.
WMV2
 This is a video codec. The name to use at the command line is WMV2, but you can also use WMV.
This codec can be used inside the Windows Media containers.
WMA2
 This is an audio codec. The name to use at the command line is WMA2, but you can also use WMA.
This codec can be used inside the Windows Media containers.

Windows Media often uses special native codecs for Windows Media Video and Windows Media Audio. WMV3 is often called "Windows Media 9".

Fourcc Codec Supported by VLC? Comments
MP43 MPEG-4 Up-to-date
WMV1 Windows Media Video v7 Up-to-date
WMV2 Windows Media Video v8 Up-to-date Not totally implemented for rare files. Please send the files.
WMV3 Windows Media Video 9 (v3) Up-to-date Not totally implemented for rare files (VBR). Please send the files.
WVC1, WMVA Windows Media Video 9 Advanced Profile Up-to-date Not totally implemented for rare files (VBR, interlacing). Please send the files.
WMVP Windows Media Video 9 Image Up-to-date VLC 2.0 or through dmo for older versions
WVP2 Windows Media Video 9.1 Image (v2) Up-to-date VLC 2.0 or through dmo for older versions
MSS1 Windows Media Screen v7 Up-to-date with dmo ONLY
MSS2 Windows Media Video 9 screen codec Up-to-date with dmo ONLY

More info on MSDN

Compatibility

Protected content

Windows Media files may contain Digital Restrictions Management (DRM) facilities intended to protect copyrights. VLC does not play any DRM'd files.

Windows Media Video 3

WMV3, the Video part of Windows Media 9, is supported in VLC since version 0.8.6. Upgrade to the latest version (3.0.12) to play WMV files.

If you are unable to upgrade, there are still some fixes. If you're using Windows and have Windows Media Player 9/10 installed, VLC should be able to play these files, by using Microsoft's own files. Or, if you're using Linux, see the Common Problems page for a workaround.

On Windows Media Player (Mac)

Microsoft's Windows Media Player for the Mac does not support all WMV encoded files since it supports only the ASF file container.[Please check this]

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