ICCOMPRESSFRAMES structure (vfw.h)
The ICCOMPRESSFRAMES structure contains compression parameters used with the ICM_COMPRESS_FRAMES_INFO message.
Syntax
typedef struct {
DWORD dwFlags;
LPBITMAPINFOHEADER lpbiOutput;
LPARAM lOutput;
LPBITMAPINFOHEADER lpbiInput;
LPARAM lInput;
LONG lStartFrame;
LONG lFrameCount;
LONG lQuality;
LONG lDataRate;
LONG lKeyRate;
DWORD dwRate;
DWORD dwScale;
DWORD dwOverheadPerFrame;
DWORD dwReserved2;
LONG( )(LPARAM lInput,LONG lFrame,LPVOID lpBits,LONG len) *GetData;
LONG( )(LPARAM lOutput,LONG lFrame,LPVOID lpBits,LONG len) *PutData;
} ICCOMPRESSFRAMES;
Members
dwFlags
Applicable flags. The following value is defined: ICCOMPRESSFRAMES_PADDING. If this value is used, padding is used with the frame.
lpbiOutput
Pointer to a BITMAPINFOHEADER structure containing the output format.
lOutput
Reserved; do not use.
lpbiInput
Pointer to a BITMAPINFOHEADER structure containing the input format.
lInput
Reserved; do not use.
lStartFrame
Number of the first frame to compress.
lFrameCount
Number of frames to compress.
lQuality
Quality setting.
lDataRate
Maximum data rate, in bytes per second.
lKeyRate
Maximum number of frames between consecutive key frames.
dwRate
Compression rate in an integer format. To obtain the rate in frames per second, divide this value by the value in dwScale.
dwScale
Value used to scale dwRate to frames per second.
dwOverheadPerFrame
Reserved; do not use.
dwReserved2
Reserved; do not use.
GetData
Reserved; do not use.
PutData
Reserved; do not use.
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
Video Compression Manager