# VkVideoEncodeAV1StdFlagBitsKHR(3) Manual Page

## Name

VkVideoEncodeAV1StdFlagBitsKHR - Video encode AV1 syntax capability flags

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## C Specification

Bits which may be set in VkVideoEncodeAV1CapabilitiesKHR::`stdSyntaxFlags`, indicating the capabilities related to the AV1 syntax elements, are:

    // Provided by VK_KHR_video_encode_av1
    typedef enum VkVideoEncodeAV1StdFlagBitsKHR {
        VK_VIDEO_ENCODE_AV1_STD_UNIFORM_TILE_SPACING_FLAG_SET_BIT_KHR = 0x00000001,
        VK_VIDEO_ENCODE_AV1_STD_SKIP_MODE_PRESENT_UNSET_BIT_KHR = 0x00000002,
        VK_VIDEO_ENCODE_AV1_STD_PRIMARY_REF_FRAME_BIT_KHR = 0x00000004,
        VK_VIDEO_ENCODE_AV1_STD_DELTA_Q_BIT_KHR = 0x00000008,
    } VkVideoEncodeAV1StdFlagBitsKHR;

## Description

- `VK_VIDEO_ENCODE_AV1_STD_UNIFORM_TILE_SPACING_FLAG_SET_BIT_KHR` specifies whether the implementation supports using the application-provided value for `StdVideoAV1TileInfoFlags`::`uniform_tile_spacing_flag` in the AV1 tile parameters when that value is `1`, indifferent of the coded extent of the encode input picture and the number of tile columns and rows requested in the `TileCols` and `TileRows` members of `StdVideoAV1TileInfo`.

- `VK_VIDEO_ENCODE_AV1_STD_SKIP_MODE_PRESENT_UNSET_BIT_KHR` specifies whether the implementation supports using the application-provided value for `StdVideoEncodeAV1PictureInfoFlags`::`skip_mode_present` when that value is `0`.

- `VK_VIDEO_ENCODE_AV1_STD_PRIMARY_REF_FRAME_BIT_KHR` specifies whether the implementation supports using the application-provided value for `StdVideoEncodeAV1PictureInfo`::`primary_ref_frame`.

- `VK_VIDEO_ENCODE_AV1_STD_DELTA_Q_BIT_KHR` specifies whether the implementation supports using the application-provided values for the `DeltaQYDc`, `DeltaQUDc`, `DeltaQUAc`, `DeltaQVDc`, and `DeltaQVAc` members of `StdVideoAV1Quantization`.

These capability flags provide information to the application about specific AV1 syntax element values that the implementation supports without having to override them and do not otherwise restrict the values that the application can specify for any of the mentioned AV1 syntax elements.

## See Also

VK_KHR_video_encode_av1, VkVideoEncodeAV1StdFlagsKHR

## 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 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0