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eAVEncCommonRateControlMode enumeration (codecapi.h)

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[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Specifies the rate control mode for an encoder. This enumeration is used with the AVEncCommonRateControlMode codec property.

Syntax

typedef enum eAVEncCommonRateControlMode {
  eAVEncCommonRateControlMode_CBR = 0,
  eAVEncCommonRateControlMode_PeakConstrainedVBR = 1,
  eAVEncCommonRateControlMode_UnconstrainedVBR = 2,
  eAVEncCommonRateControlMode_Quality = 3,
  eAVEncCommonRateControlMode_LowDelayVBR = 4,
  eAVEncCommonRateControlMode_GlobalVBR = 5,
  eAVEncCommonRateControlMode_GlobalLowDelayVBR = 6
} ;

Constants

 
eAVEncCommonRateControlMode_CBR
Value: 0
Constant bit rate (CBR) encoding.
eAVEncCommonRateControlMode_PeakConstrainedVBR
Value: 1
Constrained variable bit rate (VBR) encoding.
eAVEncCommonRateControlMode_UnconstrainedVBR
Value: 2
Unconstrained VBR encoding.
eAVEncCommonRateControlMode_Quality
Value: 3
Quality-based VBR encoding. The encoder selects the bit rate to match a specified quality level. To specify the quality level, set the AVEncCommonQuality property.
eAVEncCommonRateControlMode_LowDelayVBR
Value: 4
Low delay VBR encoding. H.264 extension.

Requires Windows 8.
eAVEncCommonRateControlMode_GlobalVBR
Value: 5
Global VBR encoding. H.264 extension.

Requires Windows 8.
eAVEncCommonRateControlMode_GlobalLowDelayVBR
Value: 6
Global low delay VBR encoding. H.264 extension.

Requires Windows 8.

Remarks

This enumeration is also used with H.264 UVC 1.5 camera encoders.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps | UWP apps]
Minimum supported server Windows 2000 Server [desktop apps | UWP apps]
Header codecapi.h

See also

Codec API Enumerations

ICodecAPI Interface