VkVideoEncodeH264RateControlFlagBitsEXT(3)

# VkVideoEncodeH264RateControlFlagBitsEXT(3) Manual Page

## Name

VkVideoEncodeH264RateControlFlagBitsEXT - H.264 encode rate control bits

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## C Specification

Bits which can be set in VkVideoEncodeH264RateControlInfoEXT::`flags`, specifying H.264 rate control flags, are:

    // Provided by VK_EXT_video_encode_h264
    typedef enum VkVideoEncodeH264RateControlFlagBitsEXT {
        VK_VIDEO_ENCODE_H264_RATE_CONTROL_ATTEMPT_HRD_COMPLIANCE_BIT_EXT = 0x00000001,
        VK_VIDEO_ENCODE_H264_RATE_CONTROL_REGULAR_GOP_BIT_EXT = 0x00000002,
        VK_VIDEO_ENCODE_H264_RATE_CONTROL_REFERENCE_PATTERN_FLAT_BIT_EXT = 0x00000004,
        VK_VIDEO_ENCODE_H264_RATE_CONTROL_REFERENCE_PATTERN_DYADIC_BIT_EXT = 0x00000008,
        VK_VIDEO_ENCODE_H264_RATE_CONTROL_TEMPORAL_LAYER_PATTERN_DYADIC_BIT_EXT = 0x00000010,
    } VkVideoEncodeH264RateControlFlagBitsEXT;

## Description

- `VK_VIDEO_ENCODE_H264_RATE_CONTROL_ATTEMPT_HRD_COMPLIANCE_BIT_EXT` specifies that rate control should attempt to produce an HRD compliant bitstream.

- `VK_VIDEO_ENCODE_H264_RATE_CONTROL_REGULAR_GOP_BIT_EXT` 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 VkVideoEncodeH264RateControlInfoEXT structure.

- `VK_VIDEO_ENCODE_H264_RATE_CONTROL_REFERENCE_PATTERN_FLAT_BIT_EXT` specifies that the application intends to follow a flat reference pattern.

- `VK_VIDEO_ENCODE_H264_RATE_CONTROL_REFERENCE_PATTERN_DYADIC_BIT_EXT` specifies that the application intends to follow a dyadic reference pattern.

- `VK_VIDEO_ENCODE_H264_RATE_CONTROL_TEMPORAL_LAYER_PATTERN_DYADIC_BIT_EXT` specifies that the application intends to follow a dyadic temporal layer pattern.

## See Also

VK_EXT_video_encode_h264, VkVideoEncodeH264RateControlFlagsEXT

## 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 2014-2023 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0