在 silverlight 中播放视频？
如何使用 silverlight 播放视频？
Visual Studio 是否内置了视频播放器组件？或者我需要制作一个视频播放器？
How do yo play a video with silverlight?
does Visual Studio come with a video player component build in? or do I need to make a video player?
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在 SL 中：
服务器端需要支持 MMS（RTSP 协议 - 流）或渐进式下载（MediaElement 端的 MMS 负责两者）。视频应符合 SMPTE 421M 视频编解码器标准 (VC-1)。
In SL:
Server-side needs to support MMS (RTSP protocol - streaming) or progressive downloads (MMS on the MediaElement's side takes care of both). Videos should conform to the SMPTE 421M video codec standard (VC-1).
通常情况下，这取决于您的要求。
您可以使用 Silverlight 附带的媒体元素 (msdn 信息此处），但是，这意味着从头开始构建所有内容，它不带有“播放器镶边”，如按钮和视觉样式。
如果您想要一个预先构建的“播放器”，至少有几个选项，Expression Encoder 工具（提供免费版本），附带许多 Silverlight 播放器，您可以根据需要自由使用和修改。您可以在表达式编码器工具的“模板”部分下找到它们。
另一种选择是使用“Microsoft Media Platform: Player Framework”（以前称为 Silverlight Media Framework (SMF)），这是 Microsoft 参与的一个开源项目，它带有功能齐全的“播放器”并构建根据行业标准，您可以在 http://smf.codeplex.com 找到它。
祝你好运！
As often is the case, it depends what you're requirements are.
You can use the media element which comes with Silverlight (msdn info here) , however, that means building everything from scratch, it does not come with a "player chrome", as in buttons and visual styles.
If you want a pre-built "player", there's at least a couple of options, the Expression Encoder tool (a free version is available), comes with a number of Silverlight players that you can freely use and modify if you wish. You find them under the "templates" section in expression encoder tool.
Another option is to use the "Microsoft Media Platform: Player Framework" (formerly known as Silverlight Media Framework (SMF)), which is a open source project which Microsoft is involved in, it comes with a fully featured "player" and is built on industry standards, you can find it at http://smf.codeplex.com.
Good luck!