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IAMTimelineGroup::SetMediaType

 
Microsoft DirectShow 9.0

IAMTimelineGroup::SetMediaType

The SetMediaType method sets the uncompressed media type for the group.

Syntax

  HRESULT SetMediaType(
    AM_MEDIA_TYPE *pmt
);

Parameters

pmt

[in] Pointer to an AM_MEDIA_TYPE structure describing the format.

Return Value

Returns one of the following HRESULT values:

Return code Description
S_OK Success.
E_POINTER NULL pointer argument.
VFW_E_INVALIDMEDIATYPE The specified media type is invalid.

Remarks

Currently, the following media types are supported:

  • Uncompressed RGB video
  • 16 bits per pixel, 555 format (MEDIASUBTYPE_RGB555)
  • 24 bits per pixel (MEDIASUBTYPE_RGB24)
  • 32 bits per pixel, with alpha (MEDIASUBTYPE_ARGB32, not MEDIASUBTYPE_RGB32)
  • 16-bit stereo PCM audio (MEDIASUBTYPE_PCM)

Video types must use FORMAT_VideoInfo for the format type and VIDEOINFOHEADER for the format block. The VIDEOINFOHEADER2 format is not supported. Also, top-down video formats (biHeight < 0) are not supported.

To specify a compression format for the group, call the IAMTimelineGroup::SetSmartRecompressFormat method.

Requirements

Header: Include Qedit.h. This header file is not compatible with Microsoft® Direct3D® headers later than version 7.

Library: Use strmiids.lib.

See Also