@xx232，
这边有相关的一篇英文文章，你可以参考一下：
http://stackoverflow.com/questions/914958/is-it-possible-to-synchronize-videos-across-multiple-computers-using-wpf
“
You can try using my project,
WPF Mediakit. It should set you way ahead if need access to the low level DirectShow stuff.
To do this, essentially you would designate one computer as the "server" and the rest as "clients". The clients would connect to the server to get the current position, compare it to their current position..and if there is n-amount
of disparity, seek to adjust.
Out of the box in MediaKit, the MediaUriElement control has a property called "PreferedPositionFormat". If you set that to Frames (and the codecs you are using supports it..most of the time they dont and just support MediaTime), you can have
frame granularity of where to set the "Position" property. Even the MediaTime format may be enough.
”
设置一台电脑为服务器，其他的作为客户端，然后客户端连接服务器获取当前的位置并做比较。这里的作者是用的DirectShow，它的代码在这里：http://wpfmediakit.codeplex.com/
Barry
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