Registered Extension Number

39

Revision

14

Ratification Status

Ratified

Extension and Version Dependencies

Contact

Extension Proposal

Other Extension Metadata

Last Modified Date

2023-12-05

IP Status

No known IP claims.

Contributors
  • Ahmed Abdelkhalek, AMD

  • George Hao, AMD

  • Jake Beju, AMD

  • Peter Fang, AMD

  • Ping Liu, Intel

  • Srinath Kumarapuram, NVIDIA

  • Tony Zlatinski, NVIDIA

  • Ravi Chaudhary, NVIDIA

  • Yang Liu, AMD

  • Daniel Rakos, RasterGrid

  • Aidan Fabius, Core Avionics & Industrial Inc.

  • Lynne Iribarren, Independent

Description

This extension builds upon the VK_KHR_video_encode_queue extension by adding support for encoding elementary video stream sequences compliant with the H.264/AVC video compression standard.

Note

This extension was promoted to KHR from the provisional extension VK_EXT_video_encode_h264.

New Structures

New Enums

New Bitmasks

New Enum Constants

  • VK_KHR_VIDEO_ENCODE_H264_EXTENSION_NAME

  • VK_KHR_VIDEO_ENCODE_H264_SPEC_VERSION

  • Extending VkStructureType:

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_CAPABILITIES_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_DPB_SLOT_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_GOP_REMAINING_FRAME_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_NALU_SLICE_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_PICTURE_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_PROFILE_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_QUALITY_LEVEL_PROPERTIES_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_RATE_CONTROL_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_RATE_CONTROL_LAYER_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_SESSION_CREATE_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_SESSION_PARAMETERS_ADD_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_SESSION_PARAMETERS_CREATE_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_SESSION_PARAMETERS_FEEDBACK_INFO_KHR

    • VK_STRUCTURE_TYPE_VIDEO_ENCODE_H264_SESSION_PARAMETERS_GET_INFO_KHR

  • Extending VkVideoCodecOperationFlagBitsKHR:

    • VK_VIDEO_CODEC_OPERATION_ENCODE_H264_BIT_KHR

Version History

  • Revision 0, 2018-7-23 (Ahmed Abdelkhalek)

    • Initial draft

  • Revision 0.5, 2020-02-13 (Tony Zlatinski)

    • General Spec cleanup

    • Added DPB structures

    • Change the VCL frame encode structure

    • Added a common Non-VCL Picture Paramarameters structure

  • Revision 1, 2021-03-29 (Tony Zlatinski)

    • Spec and API updates

  • Revision 2, August 1 2021 (Srinath Kumarapuram)

    • Rename VkVideoEncodeH264CapabilitiesFlagsEXT to VkVideoEncodeH264CapabilityFlagsEXT and VkVideoEncodeH264CapabilitiesFlagsEXT to VkVideoEncodeH264CapabilityFlagsEXT, following Vulkan naming conventions.

  • Revision 3, 2021-12-08 (Ahmed Abdelkhalek)

    • Rate control updates

  • Revision 4, 2022-02-04 (Ahmed Abdelkhalek)

    • Align VkVideoEncodeH264VclFrameInfoEXT structure to similar one in VK_EXT_video_encode_h265 extension

  • Revision 5, 2022-02-10 (Ahmed Abdelkhalek)

    • Updates to encode capability interface

  • Revision 6, 2022-03-16 (Ahmed Abdelkhalek)

    • Relocate Std header version reporting/requesting from this extension to VK_KHR_video_queue extension.

    • Remove redundant maxPictureSizeInMbs from VkVideoEncodeH264SessionCreateInfoEXT.

    • Remove the now empty VkVideoEncodeH264SessionCreateInfoEXT.

  • Revision 7, 2022-04-06 (Ahmed Abdelkhalek)

    • Add capability flag to report support to use B frame in L1 reference list.

    • Add capability flag to report support for disabling SPS direct_8x8_inference_flag.

  • Revision 8, 2022-07-18 (Daniel Rakos)

    • Replace VkVideoEncodeH264RateControlStructureFlagBitsEXT bit enum with VkVideoEncodeH264RateControlStructureEXT enum

    • Rename VkVideoEncodeH264ProfileEXT to VkVideoEncodeH264ProfileInfoEXT

    • Rename VkVideoEncodeH264ReferenceListsEXT to VkVideoEncodeH264ReferenceListsInfoEXT

    • Rename VkVideoEncodeH264EmitPictureParametersEXT to VkVideoEncodeH264EmitPictureParametersInfoEXT

    • Rename VkVideoEncodeH264NaluSliceEXT to VkVideoEncodeH264NaluSliceInfoEXT

  • Revision 9, 2022-09-18 (Daniel Rakos)

    • Rename spsStdCount, pSpsStd, ppsStdCount, and pPpsStd to stdSPSCount, pStdSPSs, stdPPSCount, and pStdPPSs, respectively, in VkVideoEncodeH264SessionParametersAddInfoEXT

    • Rename maxSpsStdCount and maxPpsStdCount to maxStdSPSCount and maxStdPPSCount, respectively, in VkVideoEncodeH264SessionParametersCreateInfoEXT

  • Revision 10, 2023-03-06 (Daniel Rakos)

    • Removed VkVideoEncodeH264EmitPictureParametersInfoEXT

    • Changed member types in VkVideoEncodeH264CapabilitiesEXT and VkVideoEncodeH264ReferenceListsInfoEXT from uint8_t to uint32_t

    • Changed the type of VkVideoEncodeH264RateControlInfoEXT::temporalLayerCount and VkVideoEncodeH264RateControlLayerInfoEXT::temporalLayerId from uint8_t to uint32_t

    • Removed VkVideoEncodeH264InputModeFlagsEXT and VkVideoEncodeH264OutputModeFlagsEXT as we only support frame-in-frame-out mode for now

    • Rename pCurrentPictureInfo in VkVideoEncodeH264VclFrameInfoEXT to pStdPictureInfo

    • Rename pSliceHeaderStd in VkVideoEncodeH264NaluSliceInfoEXT to pStdSliceHeader

    • Rename pReferenceFinalLists in VkVideoEncodeH264VclFrameInfoEXT and VkVideoEncodeH264NaluSliceInfoEXT to pStdReferenceFinalLists

    • Removed the slotIndex member of VkVideoEncodeH264DpbSlotInfoEXT and changed it to be chained to VkVideoReferenceSlotInfoKHR

    • Replaced VkVideoEncodeH264ReferenceListsInfoEXT with the new Video Std header structure StdVideoEncodeH264ReferenceLists that also includes data previously part of the now removed StdVideoEncodeH264RefMemMgmtCtrlOperations structure

    • Added new capability flag VK_VIDEO_ENCODE_H264_CAPABILITY_DIFFERENT_REFERENCE_FINAL_LISTS_BIT_EXT

  • Revision 11, 2023-05-22 (Daniel Rakos)

    • Renamed VkVideoEncodeH264VclFrameInfoEXT to VkVideoEncodeH264PictureInfoEXT

    • Added VkVideoEncodeH264PictureInfoEXT::generatePrefixNalu and VK_VIDEO_ENCODE_H264_CAPABILITY_GENERATE_PREFIX_NALU_BIT_EXT to enable the generation of H.264 prefix NALUs when supported by the implementation

    • Removed VkVideoEncodeH264RateControlLayerInfoEXT::temporalLayerId

    • Added expectDyadicTemporalLayerPattern capability

    • Added the VkVideoEncodeH264SessionParametersGetInfoEXT structure to identify the H.264 parameter sets to retrieve encoded parameter data for, and the VkVideoEncodeH264SessionParametersFeedbackInfoEXT structure to retrieve H.264 parameter set override information when using the new vkGetEncodedVideoSessionParametersKHR command

    • Added VkVideoEncodeH264NaluSliceInfoEXT::constantQp to specify per-slice constant QP when rate control mode is VK_VIDEO_ENCODE_RATE_CONTROL_MODE_DISABLED_BIT_KHR

    • Added VkVideoEncodeH264QualityLevelPropertiesEXT for retrieving H.264 specific quality level recommendations

    • Replaced VkVideoEncodeH264RateControlStructureEXT enum with the flags type VkVideoEncodeH264RateControlFlagsEXT and bits defined in VkVideoEncodeH264RateControlFlagBitsEXT and added HRD compliance flag

    • Removed useInitialRcQp and initialRcQp members of VkVideoEncodeH264RateControlLayerInfoEXT

    • Added prefersGopRemainingFrames and requiresGopRemainingFrames, and the new VkVideoEncodeH264GopRemainingFrameInfoEXT structure to allow specifying remaining frames of each type in the rate control GOP

    • Added maxTemporalLayers, maxQp, and minQp capabilities

    • Added maxLevelIdc capability and new VkVideoEncodeH264SessionCreateInfoEXT structure to specify upper bounds on the H.264 level of the produced video bitstream

    • Moved capability flags specific to codec syntax restrictions from VkVideoEncodeH264CapabilityFlagsEXT to the new VkVideoEncodeH264StdFlagsEXT which is now included as a separate stdSyntaxFlags member in VkVideoEncodeH264CapabilitiesEXT

    • Removed codec syntax override values from VkVideoEncodeH264CapabilitiesEXT

    • Removed VkVideoEncodeH264NaluSliceInfoEXT::mbCount and VK_VIDEO_ENCODE_H264_CAPABILITY_SLICE_MB_COUNT_BIT_EXT

    • Replaced VK_VIDEO_ENCODE_H264_CAPABILITY_MULTIPLE_SLICES_PER_FRAME_BIT_EXT with the new maxSliceCount capability

    • Removed capability flag VK_VIDEO_ENCODE_H264_CAPABILITY_DIFFERENT_REFERENCE_FINAL_LISTS_BIT_EXT and removed pStdReferenceFinalLists members from the VkVideoEncodeH264PictureInfoEXT and VkVideoEncodeH264NaluSliceInfoEXT structures as reference lists info is now included in pStdPictureInfo

    • Added capability flag VK_VIDEO_ENCODE_H264_CAPABILITY_B_FRAME_IN_L0_LIST_BIT_EXT

  • Revision 12, 2023-07-19 (Daniel Rakos)

    • Added video std capability flags VK_VIDEO_ENCODE_H264_STD_SLICE_QP_DELTA_BIT_EXT and VK_VIDEO_ENCODE_H264_STD_DIFFERENT_SLICE_QP_DELTA_BIT_EXT

    • Fixed optionality of the array members of VkVideoEncodeH264SessionParametersAddInfoEXT

    • Fixed optionality of VkVideoEncodeH264RateControlInfoEXT::flags

  • Revision 13, 2023-09-04 (Daniel Rakos)

    • Change extension from EXT to KHR

    • Extension is no longer provisional

  • Revision 14, 2023-12-05 (Daniel Rakos)

    • Condition reference picture setup based on the value of StdVideoEncodeH264PictureInfo::flags.is_reference

See Also

Document Notes

For more information, see the Vulkan Specification

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

Copyright 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0