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WMVIDEOINFOHEADER2 structure (wmsdkidl.h)

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[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The WMVIDEOINFOHEADER2 structure describes the bitmap and color information for a video image, including interlace, copy protection, and aspect ratio.

Syntax

typedef struct tagWMVIDEOINFOHEADER2 {
  RECT             rcSource;
  RECT             rcTarget;
  DWORD            dwBitRate;
  DWORD            dwBitErrorRate;
  LONGLONG         AvgTimePerFrame;
  DWORD            dwInterlaceFlags;
  DWORD            dwCopyProtectFlags;
  DWORD            dwPictAspectRatioX;
  DWORD            dwPictAspectRatioY;
  DWORD            dwReserved1;
  DWORD            dwReserved2;
  BITMAPINFOHEADER bmiHeader;
} WMVIDEOINFOHEADER2;

Members

rcSource

RECT structure that specifies what part of the source stream should be used to fill the destination buffer. Renderers can use this field to ask the decoders to stretch or clip.

rcTarget

RECT structure that specifies that specifies what part of the destination buffer should be used

dwBitRate

Approximate data rate of the video stream, in bits per second.

dwBitErrorRate

Data error rate of the video stream, in bits per second.

AvgTimePerFrame

The video frame's average display time, in 100-nanosecond units.

dwInterlaceFlags

Bit-wise combination of zero or more flags that describe interlacing behavior. The flags are defined in Dvdmedia.h in the DirectX SDK. Undefined bits must be set to zero or else the connection will be rejected.

dwCopyProtectFlags

Flag set with the AMCOPYPROTECT_RestrictDuplication value (0x00000001) to indicate that the duplication of the stream should be restricted. Undefined bits must be set to zero or else the connection will be rejected.

dwPictAspectRatioX

The X dimension of the video rectangle's aspect ratio. For example, 16 for a 16:9 rectangle.

dwPictAspectRatioY

The Y dimension of the video rectangle's aspect ratio. For example, 9 for a 16:9 rectangle.

dwReserved1

Reserved for future use. Must be zero. (Note: this is different from the corresponding member of the VIDEOINFOHEADER2 structure used in DirectShow.

dwReserved2

Reserved for future use. Must be zero.

bmiHeader

BITMAPINFOHEADER structure that contains color and dimension information for the video image bitmap.

Remarks

This structure is identical to the VIDEOINFOHEADER2 structure defined in Dvdmedia.h. For more information, see the DirectShow documentation in the DirectX SDK.

Requirements

Requirement Value
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]
Header wmsdkidl.h (include Wmsdk.h)

See also

Structures