IMediaDet::get_StreamType method

• 05/31/2018
• 2 minutes to read
• • s
  • d
  • m
  • m

The get_StreamType method retrieves the globally unique identifier (GUID) for the media type of the current stream.

Syntax

HRESULT get_StreamType(
  [out, retval] GUID *pVal
);

Parameters

pVal [out, retval]

Receives the major type GUID for the media type.

Return value

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

This method retrieves the majortype member of the AM_MEDIA_TYPE structure. The AM_MEDIA_TYPE structure describes the format of the stream, and the majortype member is a GUID that indicates the general category, such as audio or video. For a video stream, the GUID is MEDIATYPE_Video. For audio, it is MEDIATYPE_Audio. To retrieve the entire AM_MEDIA_TYPE structure, call the IMediaDet::get_StreamMediaType method.

Before calling this method, set the file name and stream by calling IMediaDet::put_Filename and IMediaDet::put_CurrentStream.

If the media detector is in bitmap grab mode, this method returns E_INVALIDARG. For more information, see IMediaDet::EnterBitmapGrabMode.

Requirements

See also

IMediaDet Interface

Error and Success Codes