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VIDEOENCODER_BITRATE_MODE Enumeration

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Microsoft DirectShow 9.0

VIDEOENCODER_BITRATE_MODE Enumeration

The VIDEOENCODER_BITRATE_MODE enumeration type defines the three types of bitrates supported by the IEncoderAPI interface.

Syntax

typedef enum VIDEOENCODER_BITRATE_MODE {
  ConstantBitRate = 0,
  VariableBitRateAverage,
  VariableBitRatePeak
};

Members

ConstantBitRate

Indicates that the bit rate used for encoding is constant.

VariableBitRateAverage

Indicates that the bit rate used for encoding is variable with the specified bitrate used as a guaranteed average over a specified window. The default window size is considered to be five minutes.

VariableBitRatePeak

Specifies that the ENCAPIPARAM_BITRATE value is the expected (not guaranteed) average bit rate over a given time period and that the ENCAPIPARAM_PEAK_BITRATE value is the peak which the bit rate must not exceed. The default window size is considered to be 500ms (which is traditionally equal to one GOP).

Requirements

  Header: Dshow.h

See Also