C Specification
Possible AV1 encode rate control groups are as follows:
// Provided by VK_KHR_video_encode_av1
typedef enum VkVideoEncodeAV1RateControlGroupKHR {
VK_VIDEO_ENCODE_AV1_RATE_CONTROL_GROUP_INTRA_KHR = 0,
VK_VIDEO_ENCODE_AV1_RATE_CONTROL_GROUP_PREDICTIVE_KHR = 1,
VK_VIDEO_ENCODE_AV1_RATE_CONTROL_GROUP_BIPREDICTIVE_KHR = 2,
} VkVideoEncodeAV1RateControlGroupKHR;Description
-
VK_VIDEO_ENCODE_AV1_RATE_CONTROL_GROUP_INTRA_KHR should be specified when encoding AV1 frames that use intra-only prediction (e.g. when encoding AV1 frames of type
STD_VIDEO_AV1_FRAME_TYPE_KEYorSTD_VIDEO_AV1_FRAME_TYPE_INTRA_ONLY). -
VK_VIDEO_ENCODE_AV1_RATE_CONTROL_GROUP_PREDICTIVE_KHR should be specified when encoding AV1 frames that only have forward references in display order.
-
VK_VIDEO_ENCODE_AV1_RATE_CONTROL_GROUP_BIPREDICTIVE_KHR should be specified when encoding AV1 frames that have backward references in display order.
|
Note
|
While the application can specify any rate control group for any frame, regardless of the frame type, prediction mode, or prediction direction, specifying a rate control group that does not reflect the prediction direction used by the encoded frame may result in unexpected behavior of the implementation’s rate control algorithm. |
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.