IWMReader::GetOutputFormatCount method

The GetOutputFormatCount method is used for determining all possible format types supported by this output media stream on the reader.

Syntax

HRESULT GetOutputFormatCount(
  DWORD dwOutputNumber,
  DWORD *pcFormats
);

Parameters

dwOutputNumber

DWORD containing the output number.

pcFormats

Pointer to a count of formats.

Return value

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.

Remarks

The number of formats that can be delivered on output is determined by the decoding codec. The Windows Media codecs can deliver media samples for a stream in a number of formats. For example, the Windows Media Video 9 codec can deliver samples as bitmapped images or as YUV images with varying properties to suit your needs.

Every compressed media type has a default output format determined by the codec. You can obtain the properties of the default output format by calling IWMReader::GetOutputProps.

This method is synchronous and does not result in any messages being sent to the status callback.

Requirements

   
Minimum supported client Windows 2000 Professional [desktop apps only],Windows Media Format 7 SDK, or later versions of the SDK
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header wmsdkidl.h (include Wmsdk.h)
Library Wmvcore.lib; WMStubDRM.lib (if you use DRM)

See also

IWMReader Interface

IWMReader::GetOutputFormat