If you obtain an IMFTransform interface on the MPEG-4 V3 decoder, it behaves as an MFT. The MPEG-4 V3 decoder always behaves as a DMO.īy default, the MPEG-4 V3 decoder behaves as a DMO. The following table shows the conditions under which an MPEG-4 V3 decoder behaves as a DMO or an MFT. The MPEG-4 V3 decoder behaves as a DMO or an MFT depending on which interfaces you obtain and which version of Windows is running. The object has the same class identifier (CLSID) regardless of whether it acts as a DMO or an MFT. The Windows Media MPEG-4 V3 decoder object exposes the IMediaObject interface so that the object can be used as a DirectX Media Object (DMO), and it exposes the IMFTransform interface so that the object can be used as a Media Foundation Transform (MFT). The Windows Media MPEG-4 V3 decoder supports the following output media subtypes when it is acting as a Media Foundation Transform (MFT).
The Windows Media MPEG-4 V3 decoder supports the following output media subtypes when it is acting as a DirectX Media Object (DMO). The Windows Media MPEG-4 V3 decoder supports the following input media types. You can create an instance of the MPEG-4 V3 decoder by calling CoCreateInstance. The class identifier (CLSID) for the Windows MPEG-4 V3 decoder is represented by the constant CLSID_CMpeg43DecMediaObject.
The Windows Media MPEG-4 V3 decoder decodes MPEG-4 V3 video streams.
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