VkVideoEncodeH265RateControlFlagBitsKHR(3)

# VkVideoEncodeH265RateControlFlagBitsKHR(3) Manual Page

## Name

VkVideoEncodeH265RateControlFlagBitsKHR - H.265 encode rate control bits

## C Specification

Bits which can be set in VkVideoEncodeH265RateControlInfoKHR::`flags`, specifying H.265 rate control flags, are:

    // Provided by VK_KHR_video_encode_h265
    typedef enum VkVideoEncodeH265RateControlFlagBitsKHR {
        VK_VIDEO_ENCODE_H265_RATE_CONTROL_ATTEMPT_HRD_COMPLIANCE_BIT_KHR = 0x00000001,
        VK_VIDEO_ENCODE_H265_RATE_CONTROL_REGULAR_GOP_BIT_KHR = 0x00000002,
        VK_VIDEO_ENCODE_H265_RATE_CONTROL_REFERENCE_PATTERN_FLAT_BIT_KHR = 0x00000004,
        VK_VIDEO_ENCODE_H265_RATE_CONTROL_REFERENCE_PATTERN_DYADIC_BIT_KHR = 0x00000008,
        VK_VIDEO_ENCODE_H265_RATE_CONTROL_TEMPORAL_SUB_LAYER_PATTERN_DYADIC_BIT_KHR = 0x00000010,
    } VkVideoEncodeH265RateControlFlagBitsKHR;

## Description

- VK_VIDEO_ENCODE_H265_RATE_CONTROL_ATTEMPT_HRD_COMPLIANCE_BIT_KHR specifies that rate control should attempt to produce an HRD compliant bitstream, as defined in annex C of the ITU-T H.265 Specification.

- VK_VIDEO_ENCODE_H265_RATE_CONTROL_REGULAR_GOP_BIT_KHR specifies that the application intends to use a regular GOP structure according to the parameters specified in the `gopFrameCount`, `idrPeriod`, and `consecutiveBFrameCount` members of the VkVideoEncodeH265RateControlInfoKHR structure.

- VK_VIDEO_ENCODE_H265_RATE_CONTROL_REFERENCE_PATTERN_FLAT_BIT_KHR specifies that the application intends to follow a flat reference pattern in the GOP.

- VK_VIDEO_ENCODE_H265_RATE_CONTROL_REFERENCE_PATTERN_DYADIC_BIT_KHR specifies that the application intends to follow a dyadic reference pattern in the GOP.

- VK_VIDEO_ENCODE_H265_RATE_CONTROL_TEMPORAL_SUB_LAYER_PATTERN_DYADIC_BIT_KHR specifies that the application intends to follow a dyadic temporal sub-layer pattern.

## See Also

VK_KHR_video_encode_h265, VkVideoEncodeH265RateControlFlagsKHR

## Document Notes

For more information, see the Vulkan Specification.

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0