WST Decoder Filter
| Microsoft DirectShow 9.0 |
WST Decoder Filter
This component has been removed from Windows Vista and later operating systems. It is available for use in the Microsoft Windows 2000, Windows XP, and Windows Server 2003 operating systems.
- Note Starting in Windows Vista, DirectShow does not provide a filter to decode World Standard Teletext (WST).
The WST Decoder is a kernel-mode filter that accepts decoded World Standard Teletext data from the WST Codec and delivers the bitmaps to Pin 2 on the Overlay Mixer using fonts supplied by Microsoft. Only Western European languages are supported at this time; no Unicode fonts are currently provided.
This filter can be added to the graph automatically by calling ICaptureGraphBuilder2::RenderStream, using the output pin of the WST Codec.
| Filter Interfaces | ISpecifyPropertyPages, IAMWstDecoder |
| Input Pin Media Types | MEDIATYPE_VBI, MEDIASUBTYPE_TELETEXT |
| Input Pin Interfaces | IPin |
| Output Pin Media Types | MEDIATYPE_Video |
| Output Pin Interfaces | IPin |
| Filter CLSID | CLSID_WSTDecoder |
| Property Page CLSID | CLSID_WstDecoderPropertyPage |
| Executable | Wstdecod.DLL |
| Merit | MERIT_NORMAL |
| Filter Category | CLSID_LegacyAmFilterCategory |
See Also