CODECAPI_AVEncVideoEncodeQP property

Specifies the quantization parameter (QP) for video encoding.

Data type

ULONGLONG (VT_UI8)

Property GUID

CODECAPI_AVEncVideoEncodeQP

Property value

A set of four 16-bit fields used to specify the frame QPs in fixed-QP encoding.

The fields are:

• Bits 0-15: Default QP
• Bits 16-31: QP used for I frames
• Bits 32-47: QP used for P frames
• Bits 48-63: QP used for B frames

Remarks

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

To insure consistent usage across different encoders, you should assume encoders will only look at the default QP and can ignore QP values for I/P/B pictures.

Requirements

Requirement	Value
Minimum supported client	Windows 8 [desktop apps | UWP apps]
Minimum supported server	Windows Server 2012 [desktop apps | UWP apps]
Header	Codecapi.h

See also

Media Foundation Properties

ICodecAPI