Difference between revisions of "Windows Media"

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

Revision as of 08:44, 9 October 2008

See also Windows Media Player

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. balenciaga bag balenciaga handbag balenciaga handbags balenciaga balenciaga bags chloe bag chloe paddington chloe bags chloe handbag chloe handbags chloe paddington bags chloe paddington bag chloe purse chloe paddington handbag chloe uk dolce gabbana dolce bag dolce gabbana handbags dolce gabbana bag dolce gabbana handbag dior bag dior handbag vintage dior christian dior bag dior handbags dior uk fendi handbags fendi bag fendi purses fendi hand bag fendi spy bag fendi bags discount fendi gucci handbags gucci handbag gucci bag gucci bags gucci wallet gucci vintage gucci online gucci purse gucci fashion hermes birkin hermes kelly bag hermes bag hermes bags hermes birkin bag hermes handbags louis vuitton handbags cheap louis vuitton louis vuitton uk louis vuitton louis vuitton bags buy louis vuitton lv handbag louis vuitton handbag vuitton handbags louis vuitton bag louis vuitton mulberry bag mulberry handbags mulberry handbag mulberry purse mulberry purses discount mulberry discount mulberry handbags mulberry purses mulberry bag prada prada bag prada handbag prada handbags prada bags prada wallets prada hand bags prada handbags gucci uk buy gucci gucci wallets gucci purse gucci fashion cheap gucci gucci online prada bags prada wallets prada purse prada uk prada purse louis vitton wallet louis vuitton purses louis vuitton speedy handbags uk clutch bags ladies bags womens handbag womens handbag fashion handbag luxury handbag leather handbags evening handbag handbags online ladies handbag fashion handbags handbags uk cheap handbags women's handbag bridesmaids dress cheap wedding Dresses 吊索具 HR handbag ladyshoes ansun 手袋 女装鞋 安信 roll forming 冷弯型钢 房地产律师 合同纠纷 糖尿病足 精密铸造 溃疡性结肠炎 结肠炎 肠炎 条码打印机 条形码打印机 中央空调风管清洗 化学清洗 中央空调清洗 空调清洗 清洗公司 英语口语 英语培训 北京安装卫星电视 安装卫星天线 安装卫星电视 温控器 learn mandarin learning Chinese Chinese learn Chinese language 美术培训 画室 美术高考 空气净化器 工业除湿机 抽湿机 除湿机 振动试验机 低温试验箱 高低温箱 盐雾试验箱 盐雾箱 振动台 恒温恒湿箱 恒温恒湿试验箱 高低温试验箱 生活随笔 工作感想 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.

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.
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
WMV3 Windows Media Video 9 (v3) Up-to-date Not totally implemented for rare files (VBR)
WVC1, WMVA Windows Media Video 9 Advanced Profile Up-to-date Not totally implemented for rare files (VBR)
WMVP Windows Media Video 9 Image Up-to-date with dmo ONLY
WVP2 Windows Media Video 9.1 Image (v2) Up-to-date with dmo ONLY
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

Compatability

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 workarround.

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]