D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CQP1_0096 structure (d3d12umddi.h)
The D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CQP_0080 structure contains the extended rate control definition for constant quantization parameter (CQP) mode.
Syntax
typedef struct D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CQP1_0096 {
UINT ConstantQP_FullIntracodedFrame;
UINT ConstantQP_InterPredictedFrame_PrevRefOnly;
UINT ConstantQP_InterPredictedFrame_BiDirectionalRef;
UINT QualityVsSpeed;
} D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CQP1_0096;
Members
ConstantQP_FullIntracodedFrame
The quantization parameter that should be used for each fully intra-encoded frame.
ConstantQP_InterPredictedFrame_PrevRefOnly
The quantization parameter that should be used for each encoded frame that has inter-picture references to pictures, in display order, before the current one.
ConstantQP_InterPredictedFrame_BiDirectionalRef
The quantization parameter that should be used for each encoded frame that has inter-picture references to pictures, in display order, both from the previous and next frames.
QualityVsSpeed
The quality versus speed trade-off. This value must be in the range [0, D3D12_FEATURE_DATA_VIDEO_ENCODER_SUPPORT1.MaxQualityVsSpeed]. The lower the value, the faster the encode operation.
The settings associated to each of the levels exposed by QualityVsSpeed must only refer to hardware/driver implementation optimizations and heuristics that aren't related to specific codec configurations or encoding tools selection, which are already independently exposed in the D3D12 API to the user individually. Please note that other codec configurations and codec encoding tools exposed through this API may also affect quality and speed.
Remarks
See D3D12 video encoding for general information.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 11, version 24H2 (WDDM 3.2) |
| Header | d3d12umddi.h |
See also
D3D12DDI_VIDEO_ENCODER_RATE_CONTROL_CONFIGURATION_PARAMS_0080_2