VIDEOHDR structure (vfw.h)

The VIDEOHDR structure is used by the capVideoStreamCallback function.

Syntax

typedef struct videohdr_tag {
  LPBYTE    lpData;
  DWORD     dwBufferLength;
  DWORD     dwBytesUsed;
  DWORD     dwTimeCaptured;
  DWORD_PTR dwUser;
  DWORD     dwFlags;
  DWORD_PTR dwReserved[4];
} VIDEOHDR, *PVIDEOHDR, *LPVIDEOHDR;

Members

lpData

Pointer to locked data buffer.

dwBufferLength

Length of data buffer.

dwBytesUsed

Bytes actually used.

dwTimeCaptured

Milliseconds from start of stream.

dwUser

User-defined data.

dwFlags

The flags are defined as follows.

Flag	Meaning
VHDR_DONE	Done bit
VHDR_PREPARED	Set if this header has been prepared
VHDR_INQUEUE	Reserved for driver
VHDR_KEYFRAME	Key Frame

dwReserved[4]

Reserved for driver.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	vfw.h

See also

Multimedia Timer Structures

Multimedia Timers

capVideoStreamCallback