因為程式要修改才能支援Vista VBI filters,

Windows XP :
The CC Decoder filter appears in the "WDM Streaming VBI Codecs" filter category (AM_KSCATEGORY_VBICODEC).
http://msdn2.microsoft.com/en-us/library/ms781089.aspx
http://msdn2.microsoft.com/en-us/library/ms781089.aspx

Windows Vista :
Use the VBICodec Filter instead of the old VBI filters.
http://msdn2.microsoft.com/en-us/library/ms787890.aspx
http://forums.microsoft.com/MSDN/Sh...192773&SiteID=1