#### Advanced Micro Devices

# Advanced Media Framework – AV1 Video Encoder

#### Programming Guide

---

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---

### Contents

- [Advanced Media Framework – AV1 Video Encoder](#advanced-media-framework--av1-video-encoder)
      - [Programming Guide](#programming-guide)
    - [Disclaimer](#disclaimer)
    - [Copyright Notice](#copyright-notice)
    - [MIT license](#mit-license)
    - [Contents](#contents)
  - [1 Introduction](#1-introduction)
    - [1.1 Scope](#11-scope)
    - [1.2 Pre-defined Encoder Usages](#12-pre-defined-encoder-usages)
  - [2 AMF Video Encoder VCN-AV1 Component](#2-amf-video-encoder-vcn-av1-component)
    - [2.1 Input Submission and Output Retrieval](#21-input-submission-and-output-retrieval)
    - [2.2 Encode Parameters](#22-encode-parameters)
      - [2.2.1 Static Properties](#221-static-properties)
      - [2.2.2 Dynamic Properties](#222-dynamic-properties)
      - [2.2.3 Frame Per-Submission Properties](#223-frame-per-submission-properties)
      - [2.2.4 ROI Feature](#224-roi-feature)
      - [2.2.5 Encoder Statistics Feedback](#225-encoder-statistics-feedback)
      - [2.2.6 SVC Properties](#226-svc-properties)
      - [2.2.7 LTR Properties](#227-ltr-properties)
      - [2.2.8 SmartAccess Video](#228-smartaccess-video)
  - [3 Sample Applications](#3-sample-applications)
    - [3.1 List of Parameters](#31-list-of-parameters)
    - [3.2 Command line example](#32-command-line-example)
      - [3.2.1 Transcoding application (TranscodeHW.exe)](#321-transcoding-application-transcodehwexe)
      - [3.2.2 D3D application (VCEEncoderD3D.exe)](#322-d3d-application-vceencoderd3dexe)
  - [4 Annex A: Encoding \& frame parameters description](#4-annex-a-encoding--frame-parameters-description)
    - [Table A-1. Encoder parameters](#table-a-1-encoder-parameters)
    - [Table A-2. Input frame and encoded data parameters](#table-a-2-input-frame-and-encoded-data-parameters)
    - [Table A-3. Encoder capabilities exposed in AMFCaps interface](#table-a-3-encoder-capabilities-exposed-in-amfcaps-interface)
    - [Table A-4. Encoder statistics feedback](#table-a-4-encoder-statistics-feedback)
    - [Table A-5. Encoder PSNR/SSIM feedback](#table-a-5-encoder-psnrssim-feedback)

## 1 Introduction

### 1.1 Scope

This document provides a complete description of the AMD Advanced Media Framework (AMF) Video Encoder Component. This component exposes the AMD Video Compression Engine, which provides hardware accelerated AV1 video encoding functionality.

Figure 1 provides a system overview of the AMF Video Encoder Component.

<p align="center">
    <img src="./image/AMF_Video_Encode_API.png">

<p align="center">
Figure 1 — System overview of the AMF Video Encode SDK

The AMF Video Encoder Component compresses RAW uncompressed video to an AV1 elementary bitstream.

The component does not provide a mechanism to handle audio compression, or stream multiplexing.

The component provides six different sets of pre-defined usages, which provide a convenient way for developers to configure the encoder to match the intended application use case. Advanced developers can also adjust encoding parameters to tailor the behavior to their specific application requirements.

### 1.2 Pre-defined Encoder Usages

The following table provides a brief overview of the encoding usage modes that have been defined:

| Usage Mode        | Intended use-cases                  | Comments                                                                                                                         |
| :---------------- | :---------------------------------- | :------------------------------------------------------------------------------------------------------------------------------- |
| Transcoding       | Transcoding, video editing          | Favor compression efficiency and throughput over latency.                                                                        |
| Ultra-low latency | Video game streaming                | Optimize for extremely low latency use cases (e.g. cap the number of bits per frame), to enable high-interactivity applications. |
| Low Latency       | Video collaboration, remote desktop | Optimize for low latency scenarios, but allow occasional bitrate overshoots to preserve quality.                                 |
| Webcam            | Video conferencing                  | Optimize for a low-latency video conferencing scenario.                                                                          |
| HQ                | High quality mode                   | Optimize for best subjective video quality with possible loss of performance.                                                    |
| HQLL              | High quality low latency mode       | Optimize for good quality with low latency.

<p align="center">
Table 1. Encoding usage modes
</p>

## 2 AMF Video Encoder VCN-AV1 Component

The AMF Video Encoder AV1 component provides hardware accelerated AV1 encoding using AMD’s IP.

To instantiate the AMF Video Encoder component, call the `AMFFactory::CreateComponent` method passing `AMFVideoEncoderHW_AV1` component IDs defined in the `public/include/components/VideoEncoderAV1.h` header.

### 2.1 Input Submission and Output Retrieval

The AMF Video Encoder component accepts `AMFSurface` objects as input and produces `AMFBuffer` objects for output.

### 2.2 Encode Parameters

Annex A provides the detailed description of encoding parameters (i.e., encoder properties) exposed by the Video Encoder AV1 component.

All properties are accessed using the `AMFPropertyStorage` interface of the Encoder object.

#### 2.2.1 Static Properties

Static properties (e.g., profile, tier, level, usage) must be defined before the `Init()` function is called, and will apply until the end of the encoding session.

#### 2.2.2 Dynamic Properties

All dynamic properties have default values. Several properties can be changed subsequently and these changes will be flushed to encoder only before the next `Submit()` call.

#### 2.2.3 Frame Per-Submission Properties

Per submission properties are applied on a per frame basis. They can be set optionally to force a certain behavior (e.g., force frame type to IDR) by updating the properties of the AMFSurface object that is passed through the `AMFComponent::Submit()` call.

#### 2.2.4 ROI Feature

Region of importance (ROI) feature provides a way to specify the relative importance of the macroblocks in the video frame. Encoder will further adjust the bits allocation among code blocks based on the importance, on top of the base rate control decisions. More important blocks will be encoded with relatively better quality.

The ROI map can be attached to the input frame on a per frame basis. Currently, the ROI map can only use system memory. The ROI map includes the importance values of each 64x64 SB, ranging from `0` (least important) to `10` (most important), stored in 32bit unsigned format. Refer to SimpleROI sample application for further implementation details.

#### 2.2.5 Encoder Statistics Feedback

If an application sets the `AMF_VIDEO_ENCODER_AV1_STATISTICS_FEEDBACK` flag on for an input picture, the encoder will feedback to the application statistics for this specific picture. After the encoding ends, the application can retrieve by name the specific statistic(s) it is interested in. The supported encoder statistics are listed in Table A-3.

#### 2.2.6 SVC Properties

Scalable Video Coding (SVC) is enabled by setting `AMF_VIDEO_ENCODER_AV1_NUM_TEMPORAL_LAYERS` to a value that is greater than `1`. `AMF_VIDEO_ENCODER_AV1_NUM_TEMPORAL_LAYERS` is a dynamic property and can be changed at any time during an encoding session. To ensure proper support, `AMF_VIDEO_ENCODER_AV1_MAX_NUM_TEMPORAL_LAYERS` needs to be set before initializing the encoder to a value that is not smaller than the number of temporal layers. As an example, the maximum number of temporal layers shall be set to `4` if the number of temporal layers will be changed from `3` to `4` in an encoding session. The maximum number of temporal layers supported by the encoder can be queried from the encoder capabilities before initializing the encoder.

To define SVC parameters per layer, the following format must be used:

`TL<Temporal_Layer_Number>.QL<Quality_Layer_Number>.<Parameter_name>`

As an example, with two temporal layers, to configure “Target bitrate” for the base/first temporal layer and first quality layer, the following parameter should be used:

`TL0.QL0.AMF_VIDEO_ENCODER_AV1_TARGET_BITRATE`

To configure “Target bitrate” for the second temporal layer and first quality layer, the following parameter should be used:

`TL1.QL0.AMF_VIDEO_ENCODER_AV1_TARGET_BITRATE`

When setting per layer parameters, the equivalent non-SVC layer parameters should not be set for the encoder otherwise the per layer configuration will be overwritten.

Remark: quality layers are not supported. “QL0” must be used for quality layers.

The framerate for each layer should follow a fixed relationship as the table below:

`Layer=2, framerate0:framerate1=1:1`, here `framerate0` means the framerate of `layer0` and `framerate1` means the framerate of `layer1`.

`Layer=3, framerate0:framerate1:framerate2=1:1:2`

`Layer=4,framerate0:framerate1:framerate2:framerate3=1:1:2:4`

#### 2.2.7 LTR Properties

LTR (Long Term Reference) is to manually select a reference frame which can be far away to encode current frame. Normally, the encoder selects last frame as reference or a frame at lower layer in the SVC case.

In AV1, maximum of 8 reference frames are supported according to the spec. These 8 reference frames are shared by SVC and LTR.
To use LTR, you need to set these properties as Static Properties:

`AMF_VIDEO_ENCODER_AV1_MAX_LTR_FRAMES`, Max number of LTR frames. The maximum value can be queried from `AMF_VIDEO_ENCODER_AV1_CAP_MAX_NUM_LTR_FRAMES`.
`AMF_VIDEO_ENCODER_AV1_LTR_MODE` default = `AMF_VIDEO_ENCODER_AV1_LTR_MODE_RESET_UNUSED`; remove/keep unused LTRs (not specified in property `AMF_VIDEO_ENCODER_AV1_FORCE_LTR_REFERENCE_BITFIELD`)

The LTR_MODE has two options:
```cpp
enum AMF_VIDEO_ENCODER_AV1_LTR_MODE_ENUM
{
   AMF_VIDEO_ENCODER_AV1_LTR_MODE_RESET_UNUSED     = 0,
   AMF_VIDEO_ENCODER_AV1_LTR_MODE_KEEP_UNUSED
};
```

Reset_unused: encoder will discard all other LTR frames stored once a LTR frame is used as reference.

Keep_unused: encoder will not change other LTR frames stored once any LTR frame is used as reference. When we enable auto LTR mode in PA, this mode will be automatically selected internally and `AMF_VIDEO_ENCODER_AV1_MAX_LTR_FRAMES` will be set to 4 no matter what users set. For details of “auto LTR mode”, please refer to AMF_Video_PreAnalysis_API document.

There are two Frame Per-Submission Properties need be set to use LTR:
   - `AMF_VIDEO_ENCODER_AV1_MARK_CURRENT_WITH_LTR_INDEX`, Mark current frame with LTR index. -1 means don’t save current frame into LTR slots. `0 ~ N` means save current frame into a LTR slot with index of `0 ~ N`. Here N should be <= `AMF_VIDEO_ENCODER_AV1_MAX_LTR_FRAMES`-`1`.
   When we use SVC encoding, only next base frame can be stored as LTR frame (i.e. only temporal layer number = 0 frames are allowed to be saved into LTR slot.)
   - `AMF_VIDEO_ENCODER_AV1_FORCE_LTR_REFERENCE_BITFIELD`, force LTR bit-field. This is a bit-field mask that indicate which LTR slot can be used as reference for current frame. `0b1` means only slot 0 can be used as reference. `0b10` means only slot 1 can be used as reference. 0b100 means only slot 2 can be used as reference…..
   `0b0` means no LTR frame will be used as reference for current frame hence current frame will select short term reference frame (usually last frame) as reference.
   When there are multiple bits are enabled, for example: `0b1111` (=decimal 15), that means LTR slots 0,1,2 and 3 are all allowed to be selected as reference. In this case, the closest LTR frame to current frame will be selected.
   When we encode a key frame or switch frame, all save LTR slots will be cleared.

Referring to a LTR frame not exiting in LTR slot will generate an Intra only frame.

#### 2.2.8 SmartAccess Video

On supported APU + GPU systems, there is an opportunity to use SmartAccess Video. SmartAccess Video - an optimization logic which enables the parallelization of encode and decode streams across multiple Video Codec Engine (VCN) hardware instances – empowers apps to process streams faster through seamless job distribution across available hardware. With a simple enablement of the encoder and decoder control flags, the SmartAccess Video logic will optimally use hardware resources to benefit media apps. Follow the `SMART_ACCESS_VIDEO` tag in the documentation to search for the property flags to set. On systems without SmartAccess Video support, the `SMART_ACCESS_VIDEO` properties have no effect.

## 3 Sample Applications

The AMF Encoder Sample application show how to setup and use the AMF Video Encoder AV1 Component to encode video frames that are loaded from disk or rendered by the DirectX 3D engine.

### 3.1 List of Parameters

Sample applications support almost all visible encoder parameters (except `PictureStructure`, `EndOfSequence`, `EndOfStream`) and few additional parameters.

Additional parameters of `TranscodeHW` application:

| Name        | Type   |
| :---------- | :----- |
| CODEC       | string |
| OUTPUT      | string |
| INPUT       | string |
| WIDTH       | int    |
| HEIGHT      | int    |
| ADAPTERID   | int    |
| ENGINE      | string |
| FRAMES      | int    |
| THREADCOUNT | int    |
| PREVIEWMODE | bool   |

<p align="center">
Table 2. Additional miscellaneous parameters of TranscodeHW application
</p>

---

**Name:**
`CODEC`

**Values:**
`AV1` or `av1`

**Default Values:**
`AV1`

**Description:**
Specify codec type.

---

**Name:**
`OUTPUT`

**Values:**
File name, relative or absolute path

**Default Value:**
`NULL`

**Description:**
Output AV1 file for encoded data.

---

**Name:**
`INPUT`

**Values:**
File name, relative or absolute path

**Default Value:**
`NULL`

**Description:**
Input file with frames.

---

**Name:**
`WIDTH`

**Values:**
Frame width

**Default Value:**
`0`

**Description:**
Frame width.

---

**Name:**
`HEIGHT`

**Values:**
Frame height

**Default Value:**
`0`

**Description:**
Frame height.

---

**Name:**
`AdapterID`

**Values:**
Number

**Default Value:**
`0`

**Description:**
Index of GPU adapter.

---

**Name:**
`ENGINE`

**Values:**
`DX9`, `DX11`

**Default Value:**
`DX11`

**Description:**
Specify Engine type.

---

**Name:**
`FRAMES`

**Values:**
Number of frames to be encoded

**Default Values:**
`100`

**Description:**
Number of frames to render.

---

**Name:**
`THREADCOUNT`

**Values:**
Number

**Default Values:**
`1`

**Description:**
Number of session run ip parallel.

---

**Name:**
`PREVIEWMODE`

**Values:**
`true`, `false`

**Default Values:**
`false`

**Description:**
Preview Mode.

---

Additional parameters of `VCEEncoderD3D` application:

| Name               | Category |
| :----------------- | :------- |
| CODEC              | string   |
| OUTPUT             | string   |
| RENDER             | string   |
| WIDTH              | int      |
| HEIGHT             | int      |
| FRAMES             | int      |
| ADAPTERID          | int      |
| WINDOWMODE         | bool     |
| FULLSCREEN         | bool     |
| QueryInstanceCount | bool     |
| UseInstance        | int      |
| FRAMERATE          | int      |

<p align="center">
Table 3. Miscellaneous parameters of VCEEncoderD3D application.
</p>

---

**Name:**
`CODEC`

**Values:**
`AV1` or `av1`

**Default Value:**
`AV1`

**Description:**
Specify codec type.

---

**Name:**
`OUTPUT`

**Values:**
File name, relative or absolute path

**Default Value:**
`NULL`

**Description:**
Output AV1 file for encoded data.

---

**Name:**
`RENDER`

**Values:**
`DX9`, `DX9Ex`, `DX11`, `OpenGL`, `OpenCL`, `Host`, `OpenCLDX9`, `OpenCLDX11`, `OpenGLDX9`, `OpenGLDX11`, `OpenCLOpenGLDX9`, `OpenCLOpenGLDX11`, `HostDX9`, `HostDX11`, `DX11DX9`, `Vulkan`

**Default Value:**
`DX11`

**Description:**
Specifies render type.

---

**Name:**
`WIDTH`

**Values:**
Frame width

**Default Value:**
`1280`

**Description:**
Frame width.

---

**Name:**
`HEIGHT`

**Values:**
Frame height

**Default Value:**
`720`

**Description:**
Frame height.

---

**Name:**
`FRAMES`

**Values:**
Number of frames to be encoded

**Default Value:**
`100`

**Description:**
Number of frames to render.

---

**Name:**
`ADAPTERID`

**Values:**
Number

**Default Value:**
`0`

**Description:**
Index of GPU adapter.

---

**Name:**
`WINDOWMODE`

**Values:**
`true`, `false`

**Default Value:**
`false`

**Description:**
Shows rendering window for D3D sample application.

---

**Name:**
`FULLSCREEN`

**Values:**
`true`, `false`

**Default Value:**
`false`

**Description:**
Enables full screen.

---

**Name:**
`QueryInstanceCount`

**Values:**
`true`, `false`

**Default Value:**
`false`

**Description:**
If the flag is set, the number of independent VCE instances will be quried and printed.

---

**Name:**
`UseInstance`

**Values:**
`0`... `number of instances - 1`

**Default Value:**
Depends on usage

**Description:**
If there are more than one VCE Instances, you can force which instance to use. Valid range is `[0.. (number of instances - 1)]`.

---

**Name:**
`FRAMERATE`

**Values:**
Render frame rate

**Default Value:**
`0`

**Description:**
Render frame rate.

---

### 3.2 Command line example

#### 3.2.1 Transcoding application (TranscodeHW.exe)

`TranscodeHW.exe -input input.h264 -output out.mp4 –codec AV1 -width 1280 -height 720 -Av1Usage transcoding -AV1RateControlMethod cbr -AV1TargetBitrate 100000`

This command transcodes H264 elementary stream to AV1 video in .mp4 container. Encoder is created with “Transcoding” usage.

#### 3.2.2 D3D application (VCEEncoderD3D.exe)

`VCEEncoderD3D.exe -output VideoSample_1024x768.mp4 –codec AV1 -width 1024 -height 768 -AV1Usage transcoding -AV1RateControlMethod cbr -AV1TargetBitrate 500000 -frames 400`

This command encodes `400` frames through D3D renderer and creates an output file with the encoded data. Encoder is created with “Transcoding” usage. Initial configuration sets bitrate to a value of `500` kbits/sec.

## 4 Annex A: Encoding & frame parameters description

### Table A-1. Encoder parameters

| Name (Prefix “AMF_VIDEO_ENCODER_AV1_”) | Type      |
| :------------------------------------- | :-------- |
| USAGE                                  | amf_int64 |
| PROFILE                                | amf_int64 |
| LEVEL                                  | amf_int64 |
| MAX_LTR_FRAMES                         | amf_int64 |
| TILES_PER_FRAME                        | amf_int64 |
| LTR_MODE                               | amf_int64 |
| MAX_NUM_REFRAMES                       | amf_int64 |
| MAX_CONSECUTIVE_BPICTURES              | amf_int64 |
| ADAPTIVE_MINIGOP                       | amf_bool  |
| ENCODING_LATENCY_MODE                  | amf_int64 |
| FRAMESIZE                              | AMFSize   |
| ALIGNMENT_MODE                         | amf_int64 |
| PRE_ANALYSIS_ENABLE                    | amf_bool  |
| MAX_NUM_TEMPORAL_LAYERS                | amf_int64 |
| ENABLE_SMART_ACCESS_VIDEO              | amf_bool  |

<p align="center">
Table 4. Encoder static parameters
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_USAGE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_USAGE_ENUM`: `AMF_VIDEO_ENCODER_AV1_USAGE_TRANSCODING`, `AMF_VIDEO_ENCODER_AV1_USAGE_LOW_LATENCY`,`AMF_VIDEO_ENCODER_AV1_USAGE_ULTRA_LOW_LATENCY`, 
`AMF_VIDEO_ENCODER_AV1_USAGE_WEBCAM`,`AMF_VIDEO_ENCODER_AV1_USAGE_HIGH_QUALITY`,    `AMF_VIDEO_ENCODER_AV1_USAGE_LOW_LATENCY_HIGH_QUALITY`

**Default Value:**
`AMF_VIDEO_ENCODER_AV1_USAGE_TRANSCODING`

**Description:**
Selects the AMF usage (see 1.2).

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_PROFILE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_PROFILE_ENUM`: `AMF_VIDEO_ENCODER_AV1_PROFILE_MAIN`

**Default Value:**
`AMF_VIDEO_ENCODER_PROFILE_MAIN`

**Description:**
Selects the AV1 profile.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_LEVEL`

**Values:**
`AMF_VIDEO_ENCODER_AV1_LEVEL_ENUM`:
`AMF_VIDEO_ENCODER_AV1_LEVEL_2_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_2_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_2_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_2_3`, `AMF_VIDEO_ENCODER_AV1_LEVEL_3_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_3_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_3_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_3_3`, `AMF_VIDEO_ENCODER_AV1_LEVEL_4_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_4_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_4_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_4_3`, `AMF_VIDEO_ENCODER_AV1_LEVEL_5_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_5_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_5_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_5_3`, `AMF_VIDEO_ENCODER_AV1_LEVEL_6_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_6_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_6_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_6_3`, `AMF_VIDEO_ENCODER_AV1_LEVEL_7_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_7_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_7_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_7_3`

**Default Value:**
`AMF_VIDEO_ENCODER_AV1_LEVEL_5_2`

**Description:**
Selects the AV1 Level. Automatically adjusted upwards based on frame size.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MAX_LTR_FRAMES`

**Values:**
`0` … `8`

**Default Value:**
`0`

**Description:**
The number of long-term references controlled by the user.

Remarks:
   - When == `0`, the encoder can not use LTRs during encoding.
   - When > `0`, the user has control over all LTR.
   - With user control of LTR, Intra-refresh features are not supported.
   - The actual maximum number of LTRs allowed depends on SVC setting and AV1 Level limits, encoding resolution, and DPB size. The DPB size limit impacts the maximum number of LTR allowed.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_TILES_PER_FRAME`

**Values:**
`>=1`

**Default Value:**
`1`

**Description:**
Sets the number of tiles per frame.

Remarks:
   - The frame automatically gets split into tiles evenly based on the the tile size limitations in the AV1 spec.
      - MAX_TILE_WIDTH = 4096, which means there will be an automatic vertical split of the frame if the width is above 4096 pixels; otherwise there will not be any vertical split.
      - MAX_TILE_AREA = 4096 * 2304, which means if tile width is 4096 pixels, the maximum tile height is 2304 pixels, there will be an automatic horizontal split of the frame if frame height is bigger than 2304 pixels; Maximum tile height can be calculated based on tile width, MAX_TILE_AREA/{tile width}.
      - Split will be done automatically in order to satisfy AV1 spec, regardless if `AMF_VIDEO_ENCODER_AV1_TILES_PER_FRAME` is set or not.
   - A frame can be horizontally split into more tile rows by setting `AMF_VIDEO_ENCODER_AV1_TILES_PER_FRAME`.
      - MAX_TILE_WIDTH and MAX_TILE_AREA constrain the minimum number of tiles.
      - A frame can be split into more tile rows by setting `AMF_VIDEO_ENCODER_AV1_TILES_PER_FRAME`, remember {number of tiles} = {number of tile columns} * {number of tile rows}.
      - If the user set value cannot be satisfied, it will be adjusted internally to a number close to the user set value instead.
   - Additionally, for multiple-tile cases, the output would still be frame by frame if `AMF_VIDEO_ENCODER_AV1_OUTPUT_MODE` property is set `AMF_VIDEO_ENCODER_AV1_OUTPUT_MODE_FRAME`, but there will be multiple tiles within each frame.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_LTR_MODE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_LTR_MODE_ENUM`: `AMF_VIDEO_ENCODER_AV1_LTR_MODE_RESET_UNUSED`, `AMF_VIDEO_ENCODER_AV1_LTR_MODE_KEEP_UNUSED`

**Default Value:**
`AMF_VIDEO_ENCODER_AV1_LTR_MODE_RESET_UNUSED`

**Description:**
Remove/keep unused LTRs not specified inside the LTR reference bitfield.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MAX_NUM_REFRAMES`

**Values:**
`0` … `8`

**Default Value:**
`1`

**Description:**
Maximum number of reference frames.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MAX_CONSECUTIVE_BPICTURES`

**Values:**
`0`...`127`

**Default Value:**
`0`

**Description:**
Maximum number of consecutive B Pictures.
It is recommended to set this value to `3` if `AMF_VIDEO_ENCODER_AV1_B_PIC_PATTERN` is not `0`, or both Adaptive MiniGOP and PA are enabled.  
If users specify either `AMF_VIDEO_ENCODER_AV1_B_PIC_PATTERN` or `AMF_VIDEO_ENCODER_AV1_ADAPTIVE_MINIGOP` but do not explicitly set `AMF_VIDEO_ENCODER_AV1_MAX_CONSECUTIVE_BPICTURES`, this property will default to:
- the value of `AMF_VIDEO_ENCODER_AV1_B_PIC_PATTERN` (if `AMF_VIDEO_ENCODER_AV1_B_PIC_PATTERN` is set), or
- `3` (if `AMF_VIDEO_ENCODER_AV1_ADAPTIVE_MINIGOP` is set).
- prioritizes `AMF_VIDEO_ENCODER_AV1_ADAPTIVE_MINIGOP` over `AMF_VIDEO_ENCODER_AV1_B_PIC_PATTERN`

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_ADAPTIVE_MINIGOP`

**Values:**
`true`, `false`

**Default Value:**
`false`

**Description:**
Disable/Enable Adaptive MiniGOP. Requires PA to be enabled with a minimum LOOKAHEAD_BUFFER_DEPTH size of 1.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_ENUM`: `AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_NONE`, `AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_POWER_SAVING_REAL_TIME`, `AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_REAL_TIME`, `AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_LOWEST_LATENCY`

**Default Value associated with usages:**
   - Transcoding: `AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_NONE`
   - Ultra low latency: `AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_LOWEST_LATENCY`
   - Low latency: `AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_NONE`
   - Webcam: `AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_NONE`
   - HQ: `AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_NONE`
   - HQLL: `AMF_VIDEO_ENCODER_AV1_ENCODING_LATENCY_MODE_LOWEST_LATENCY`

**Description:**
Choose different mode to balance encoder latency with power consumption.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_FRAMESIZE`

**Values:**
Width: `256` – `8192`
Height: `128` – `4352`

**Default Value:**
`0,0`

**Description:**
Frame width/Height in pixels, maximum value is hardware-specific, should be queried through `AMFCaps`.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_ALIGNMENT_MODE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_ALIGNMENT_MODE_ENUM`: `AMF_VIDEO_ENCODER_AV1_ALIGNMENT_MODE_64X16_ONLY`, `AMF_VIDEO_ENCODER_AV1_ALIGNMENT_MODE_64X16_1080P_CODED_1082`, `AMF_VIDEO_ENCODER_AV1_ALIGNMENT_MODE_NO_RESTRICTIONS`,
`AMF_VIDEO_ENCODER_AV1_ALIGNMENT_MODE_8X2_ONLY`

**Default Value:**
Depends on Encoder capabilities

**Description:**
AV1 alignment Mode.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_PRE_ANALYSIS_ENABLE`

**Values:**
`true`, `false`

**Default Value associated with usages:**
   - Transcoding: `false`
   - Ultra low latency: `false`
   - Low latency: `false`
   - Webcam: `false`
   - HQ: `true`
   - HQLL: `false`

**Description:**
Some encoder properties require this property to be set. Enables the pre-analysis module. Refer to *AMF Video PreAnalysis API* reference for more details on the pre-analysis module and its settings under different usages.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MAX_NUM_TEMPORAL_LAYERS`

**Values:**
Maximum number of temporal layers supported <= `4`

**Default Value:**
`1`

**Description:**
Sets the maximum number of temporal layers. It shall not be exceeded by the number of temporal layers. The maximum number of temporal layers supported is determined by the corresponding encoder capability.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_ENABLE_SMART_ACCESS_VIDEO`

**Values:**
`true`, `false`

**Default Value:**
`false`

**Description:**
When set to `true`, enables the SmartAccess Video feature, which optimally allocates the encoding task on supported APU/GPU pairings.

---

| Name (Prefix “AMF_VIDEO_ENCODER_AV1_”) | Type      |
| :------------------------------------- | :-------- |
| TARGET_BITRATE                         | amf_int64 |
| PEAK_BITRATE                           | amf_int64 |
| RATE_CONTROL_METHOD                    | amf_int64 |
| QVBR_QUALITY_LEVEL                     | amf_int64 |
| RATE_CONTROL_SKIP_FRAME                | amf_bool  |
| MIN_Q_INDEX_INTRA                      | amf_int64 |
| MAX_Q_INDEX_INTRA                      | amf_int64 |
| MIN_Q_INDEX_INTER                      | amf_int64 |
| MAX_Q_INDEX_INTER                      | amf_int64 |
| MIN_Q_INDEX_INTER_B                    | amf_int64 |
| MAX_Q_INDEX_INTER_B                    | amf_int64 |
| Q_INDEX_INTRA                          | amf_int64 |
| Q_INDEX_INTER                          | amf_int64 |
| Q_INDEX_INTER_B                        | amf_int64 |
| FRAMERATE                              | AMFRate   |
| VBV_BUFFER_SIZE                        | amf_int64 |
| INITIAL_VBV_BUFFER_FULLNESS            | amf_int64 |
| ENFORCE_HRD                            | amf_bool  |
| RATE_CONTROL_PREENCODE                 | amf_bool  |
| AQ_MODE                                | amd_int64 |
| FILLER_DATA                            | amf_bool  |
| HIGH_MOTION_QUALITY_BOOST              | amf_bool  |

<p align="center">
Table 5. Encoder rate-control parameters
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_TARGET_BITRATE`

**Values:**
`>0`

**Default Value:**
`20` mbps

**Description:**
Sets the target bitrate, bit/s based on use case.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_PEAK_BITRATE`

**Values:**
`>= TargetBitrate`

**Default Value associated with usages:**
   - Transcoding: `30` mbps
   - Ultra low latency: `20` mbps
   - Low latency: `20` mbps
   - Webcam: `20` mbps
   - HQ: `80` mbps
   - HQLL: `30` mbps

**Description:**
Sets the peak bitrate, use for HRD model.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD`

**Values:**
`AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_ENUM`: `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_UNKNOWN`, `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_CONSTANT_QP`, `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_LATENCY_CONSTRAINED_VBR`, `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_PEAK_CONSTRAINED_VBR`, `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_CBR`, `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_QUALITY_VBR`, `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_HIGH_QUALITY_VBR`, `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_HIGH_QUALITY_CBR`

**Default Value associated with usages:**
   - Transcoding: `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_PEAK_CONSTRAINED_VBR`
   - Ultra low latency: `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_LATENCY_CONSTRAINED_VBR`
   - Low latency: `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_PEAK_CONSTRAINED_VBR`
   - Webcam: `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_PEAK_CONSTRAINED_VBR`
   - HQ: `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_PEAK_CONSTRAINED_VBR`
   - HQLL: `AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_METHOD_PEAK_CONSTRAINED_VBR`

**Description:**
Selects the rate control method:
   - CQP – Constrained QP,
   - VBR_LAT - Latency Constrained VBR,
   - VBR - Peak Constrained VBR,
   - CBR - Constant Bitrate,
   - QVBR – Quality VBR,
   - HQVBR – High Quality VBR,
   - HQCBR – High Quality CBR.

Remarks:
   - When SVC encoding is enabled, some rate-control parameters can be configured differently for a particular SVC-layer.  An SVC-layer is denoted by an index pair `[SVC-Temporal Layer index][SVC-Quality Layer index]`. E.g. The bitrate may be configured differently for SVC-layers `[0][0]` and `[1][0]`.
   - We restrict all SVC layers to have the same Rate Control method.
   - QVBR, HQVBR and HQCBR are only supported if PreAnalysis is enabled.
   - QVBR, HQVBR and HQCBR target improving subjective quality with the possible loss of objective quality (PSNR SSIM or VMAF).

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_QVBR_QUALITY_LEVEL`

**Values:**
`1` – `51`

**Default Value:**
`23`

**Description:**
Sets the quality level for QVBR rate control method.

Remarks:
   - Only available for QVBR rate control method.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_SKIP_FRAME`

**Values:**
`true`, `false`

**Default Value associated with usages:**
   - Transcoding: `false`
   - Ultra low latency: `true`
   - Low latency: `true`
   - Webcam: `true`
   - HQ: `false`
   - HQLL: `false`

**Description:**
Enables skip frame for rate control.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MIN_Q_INDEX_INTRA`

**Values:**
`1` – `255`

**Default Value:**
`1`

**Description:**
Sets the minimum QIndex for Intra frame.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MAX_Q_INDEX_INTRA`

**Values:**
`1` – `255`

**Default Value:**
`255`

**Description:**
Sets the maximum QIndex for Intra frame.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MIN_Q_INDEX_INTER`

**Values:**
`1` – `255`

**Default Value:**
`1`

**Description:**
Sets the minimum QIndex for Inter frame.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MAX_Q_INDEX_INTER`

**Values:**
`1` – `255`

**Default Value:**
`255`

**Description:**
Sets the maximum QIndex for Inter frame.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MIN_Q_INDEX_INTER_B`

**Values:**
`1` – `255`

**Default Value:**
`1`

**Description:**
Sets the minimum QIndex for B-frames.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MAX_Q_INDEX_INTER_B`

**Values:**
`1` – `255`

**Default Value:**
`255`

**Description:**
Sets the maximum QIndex for B-frames.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_Q_INDEX_INTRA`

**Values:**
`1` – `255`

**Default Value:**
`26`

**Description:**
Sets the constant QIndex for Intra frames.

Remarks: Only available for CQP rate control method.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_Q_INDEX_INTER`

**Values:**
`1` – `255`

**Default Value:**
`26`

**Description:**
Sets the constant QIndex for Inter frames.

Remarks: Only available for CQP rate control method.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_Q_INDEX_INTER_B`

**Values:**
`1` – `255`

**Default Value:**
`26`

**Description:**
Sets the constant QIndex for B-frames.

Remarks: Only available for CQP rate control method.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_FRAMERATE`

**Values:**
`1*FrameRateDen` … `120* FrameRateDen`

**Default Value:**
`30` fps

**Description:**
Frame rate numerator/denominator. Input is : AMFRate for example, the code below will set the frame rate to `30000`/`1001`=`29.97` FPS:
`pEncoder->SetProperty(AMF_VIDEO_ENCODER_AV1_FRAMERATE,::AMFConstructRate(30000, 1001));`

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_VBV_BUFFER_SIZE`

**Values:**
`>0`

**Default Value associated with usages:**
   - Transcoding: `20` mbits
   - Ultra low latency: `735` kbits
   - Low latency: `4` mbits
   - Webcam: `2` mbits
   - HQ: `40` mbits
   - HQLL: `10` mbits

**Description:**
Sets the VBV buffer size in bits based on use case, use for HRD model.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_INITIAL_VBV_BUFFER_FULLNESS`

**Values:**
`0` – `64`, `0`=`0%`, `64`=`100%`

**Default Value:**
`64`

**Description:**
Sets the initial VBV buffer fullness, use for HRD model.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_ENFORCE_HRD`

**Values:**
`true`, `false`

**Default Value associated with usages:**
   - Transcoding: `false`
   - Ultra low latency: `true`
   - Low latency: `false`
   - Webcam: `false`
   - HQ: `false`
   - HQLL: `false`

**Description:**
Disables/enables constraints on rate control to meet HRD model requirement(s) with peak_bitrate, VBV buffer size and VBV buffer fullness settings.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_RATE_CONTROL_PREENCODE`

**Values:**
`true`, `false`

**Default Value associated with usages:**
   - Transcoding: `false`
   - Ultra low latency: `false`
   - Low latency: `false`
   - Webcam: `false`
   - HQ: `false`
   - HQLL: `false`

**Description:**
Pre-analysis assisted rate control.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_AQ_MODE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_AQ_MODE_ENUM`: `AMF_VIDEO_ENCODER_AV1_AQ_MODE_NONE`, `AMF_VIDEO_ENCODER_AV1_AQ_MODE_CAQ`

**Default Value associated with usages:**
   - Transcoding: `AMF_VIDEO_ENCODER_AV1_AQ_MODE_NONE`
   - Ultra low latency: `AMF_VIDEO_ENCODER_AV1_AQ_MODE_NONE`
   - Low latency: `AMF_VIDEO_ENCODER_AV1_AQ_MODE_NONE`
   - Webcam: `AMF_VIDEO_ENCODER_AV1_AQ_MODE_NONE`
   - HQ: `AMF_VIDEO_ENCODER_AV1_AQ_MODE_CAQ`
   - HQLL: `AMF_VIDEO_ENCODER_AV1_AQ_MODE_CAQ`

**Description:**
Similar to VBAQ in HEVC and AVC, By default, disable Adaptive Quality Mode. This feature cannot be used together with the CQP rate control method.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_FILLER_DATA`

**Values:**
`true`, `false`

**Default Value:**
`false`

**Description:**
Enable filler data for CBR usage.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_HIGH_MOTION_QUALITY_BOOST`

**Values:**
`true`, `false`

**Default Value associated with usages:**
   - Transcoding: `false`
   - Ultra low latency: `false`
   - Low latency: `false`
   - Webcam: `false`
   - HQ: `true`
   - HQLL: `true`

**Description:**
Enable high motion quality boost mode to pre-analyze the motion of the video and use this information to improve encoding.

---

| Name (Prefix “AMF_VIDEO_ENCODER_AV1_”) | Type      |
| :------------------------------------- | :-------- |
| MAX_COMPRESSED_FRAME_SIZE              | amf_int64 |
| HEADER_INSERTION_MODE                  | amf_int64 |
| SWITCH_FRAME_INSERTION_MODE            | amf_int64 |
| SWITCH_FRAME_INTERVAL                  | amd_int64 |
| GOP_SIZE                               | amd_int64 |
| CDEF_MODE                              | amd_int64 |
| INTRA_REFRESH_MODE                     | amf_int64 |
| INTRAREFRESH_STRIPES                   | amf_int64 |
| B_PIC_PATTERN                          | amf_int64 |

<p align="center">
Table 6. Encoder picture-control parameters
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MAX_COMPRESSED_FRAME_SIZE`

**Values:**
`0` – no limit

**Default Value:**
`0`

**Description:**
Maximum compressed frame size in bits that rate control algorithm will try to limit. May still larger than this number in some cases.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_HEADER_INSERTION_MODE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_HEADER_INSERTION_MODE_ENUM`: `AMF_VIDEO_ENCODER_AV1_HEADER_INSERTION_MODE_NONE`, `AMF_VIDEO_ENCODER_AV1_HEADER_INSERTION_MODE_GOP_ALIGNED`, `AMF_VIDEO_ENCODER_AV1_HEADER_INSERTION_MODE_KEY_FRAME_ALIGNED`

**Default Value:**
`AMF_VIDEO_ENCODER_AV1_HEADER_INSERTION_MODE_NONE`

**Description:**
Sets the headers insertion mode.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_SWITCH_FRAME_INSERTION_MODE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_SWITCH_FRAME_INSERTION_MODE_ENUM` `AMF_VIDEO_ENCODER_AV1_SWITCH_FRAME_INSERTION_MODE_NONE `, `AMF_VIDEO_ENCODER_AV1_SWITCH_FRAME_INSERTION_MODE_FIXED_INTERVAL`

**Default Value:**
depends on `USAGE`

**Description:**
Switch frame insertion mode.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_SWITCH_FRAME_INTERVAL`

**Values:**
`>0`

**Default Value:**
depends on `USAGE`

**Description:**
The interval between two inserted switch frames. Valid only when `AMF_VIDEO_ENCODER_AV1_SWITCH_FRAME_INSERTION_MODE` is `AMF_VIDEO_ENCODER_AV1_SWITCH_FRAME_INSERTION_MODE_FIXED_INTERVAL`.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_GOP_SIZE`

**Values:**
`>0`

**Default Value associated with usages:**
   - Transcoding: `240`
   - Ultra low latency: `300`
   - Low latency: `300`
   - Webcam: `240`
   - HQ: `300`
   - HQLL: `120`

**Description:**
The period to insert key frame in fixed size mode. 0 means only insert the first frame (infinite GOP size).

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CDEF_MODE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_CDEF_MODE_ENUM`: `AMF_VIDEO_ENCODER_AV1_CDEF_DISABLE`, `AMF_VIDEO_ENCODER_AV1_CDEF_ENABLE_DEFAULT`

**Default Value:**
`AMF_VIDEO_ENCODER_AV1_CDEF_ENABLE_DEFAULT`

**Description:**
Disable/enable the CDEF filter.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_INTRA_REFRESH_MODE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_INTRA_REFRESH_MODE_ENUM`: `AMF_VIDEO_ENCODER_AV1_INTRA_REFRESH_MODE__DISABLED`, `AMF_VIDEO_ENCODER_AV1_INTRA_REFRESH_MODE__GOP_ALIGNED`, `AMF_VIDEO_ENCODER_AV1_INTRA_REFRESH_MODE__CONTINUOUS`

**Default Value:**
`AMF_VIDEO_ENCODER_AV1_INTRA_REFRESH_MODE__DISABLED`

**Description:**
The mode of intra refresh.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_INTRAREFRESH_STRIPES`

**Values:**
`>=1`, how many stripes in a frame for intra refresh

**Default Value:**
`N/A`

**Description:**
Valid only when intra refresh is enabled.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_B_PIC_PATTERN`

**Values:**
`0`...`127`

**Default Value:**
`0`

**Description:**
Sets the number of consecutive B-pictures in a GOP.  BPicturesPattern = `0` indicates that B-pictures are not used.

---

| Name (Prefix “AMF_VIDEO_ENCODER_AV1_”) |Type       |
| :------------------------------------- | :-------- |
| QUALITY_PRESET                         | amf_int64 |
| QUERY_TIMEOUT                          | amf_int64 |
| INPUT_QUEUE_SIZE                       | amf_int64 |
| EXTRA_DATA                             | AMFBufferPtr |
| OUTPUT_MODE                            | amf_int64 |

<p align="center">
Table 7. Encoder miscellaneous parameters
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET`

**Values:**
`AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_ENUM`: `AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_HIGH_QUALITY`, `AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_QUALITY`, `AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_BALANCED`, `AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_SPEED`

**Default Value associated with usages:**
   - Transcoding: `AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_BALANCED`
   - Ultra low latency: `AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_SPEED`
   - Low latency: `AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_SPEED`
   - Webcam: `AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_QUALITY`
   - HQ: `AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_QUALITY`
   - HQLL: `AMF_VIDEO_ENCODER_AV1_QUALITY_PRESET_QUALITY`

**Description:**
Selects the quality preset in HW to balance between encoding speed and video quality.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_QUERY_TIMEOUT`

**Values:**
`0`...`50`

**Default Value associated with usages:**
   - Transcoding: `0` (no wait)
   - Ultra low latency: `0` (no wait)
   - Low latency: `0` (no wait)
   - Webcam: `0` (no wait)
   - HQ: `50`
   - HQLL: `50`

**Description:**
Timeout for QueryOutput call in ms.
Setting this to a nonzero value will reduce polling load when `QueryOutput` is called; it will be blocked until the frame is ready or until the timeout is reached.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_INPUT_QUEUE_SIZE`

**Values:**
`1` … `32`

**Default Value:**
`16`

**Description:**
Set encoder input queue size. For high-resolution sequence, recommend to set a smaller value to save storage. For low-resolution sequence, recommend to set a larger value to improve encoding speed.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_EXTRA_DATA`

**Values:**
`AMFBufferPtr`

**Default Value:**
`NULL`

**Description:**
Buffer to retrieve coded sequence header.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_MODE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_MODE_ENUM`: `AMF_VIDEO_ENCODER_AV1_OUTPUT_MODE_FRAME`,   `AMF_VIDEO_ENCODER_AV1_OUTPUT_MODE_TILE`

**Default Value:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_MODE_FRAME`

**Description:**
Defines encoder output mode.

---

| Name (Prefix “AMF_VIDEO_ENCODER_AV1_”) |Type       |
| :------------------------------------- | :-------- |
| SCREEN_CONTENT_TOOLS                   | amf_bool  |
| PALETTE_MODE                           | amf_bool  |
| FORCE_INTEGER_MV                       | amf_bool  |
| ORDER_HINT                             | amf_bool  |
| FRAME_ID                               | amf_bool  |
| TILE_GROUP_OBU                         | amf_bool  |
| ERROR_RESILIENT_MODE                   | amf_bool  |
| COLOR_BIT_DEPTH                        | amf_int64 |
| CDF_UPDATE                             | amf_bool  |
| CDF_FRAME_END_UPDATE_MODE              | amd_int64 |

<p align="center">
Table 8. Encoder configuration
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_SCREEN_CONTENT_TOOLS`

**Values:**
`true`, `false`

**Default Value:**
`true`

**Description:**
If `true`, allow enabling screen content tools by `AMF_VIDEO_ENCODER_AV1_PALETTE_MODE_ENABLE` and `AMF_VIDEO_ENCODER_AV1_FORCE_INTEGER_MV`; if `false`, all screen content tools are disabled.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_PALETTE_MODE`

**Values:**
`true`, `false`

**Default Value:**
`true`

**Description:**
If `true`, enable palette mode; if `false`, disable palette mode. Valid only when `AMF_VIDEO_ENCODER_AV1_SCREEN_CONTENT_TOOLS` is `true`.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_FORCE_INTEGER_MV`

**Values:**
`true`, `false`

**Default Value:**
`false`

**Description:**
If `true`, enable force integer MV; if `false`, disable force integer MV. Valid only when `AMF_VIDEO_ENCODER_AV1_SCREEN_CONTENT_TOOLS` is `true`.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_ORDER_HINT`

**Values:**
`true`, `false`

**Default Value:**
`false`

**Description:**
Code order hint; if `false`, don't code order hint.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_FRAME_ID`

**Values:**
`true`, `false`

**Default Value:**
depends on `USAGE`

**Description:**
If `true`, code frame id; if `false`, don't code frame id.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_TILE_GROUP_OBU`

**Values:**
`true`, `false`

**Default Value:**
depends on `USAGE`

**Description:**
If `true`, code `FrameHeaderObu + TileGroupObu` and each `TileGroupObu` contains one tile; if `false`, code `FrameObu`.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_ERROR_RESILIENT_MODE`

**Values:**
`true`, `false`

**Default Value:**
depends on `USAGE`

**Description:**
If `true`, enable error resilient mode; if `false`, disable error resilient mode.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_COLOR_BIT_DEPTH`

**Values:**
`AMF_COLOR_BIT_DEPTH_ENUM`: `AMF_COLOR_BIT_DEPTH_UNDEFINED`, `AMF_COLOR_BIT_DEPTH_8`, `AMF_COLOR_BIT_DEPTH_10`

**Default Value:**
`AMF_COLOR_BIT_DEPTH_8`

**Description:**
Sets the number of bits in each pixel’s color component in the encoder’s compressed output bitstream.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CDF_UPDATE`

**Values:**
`true`, `false`

**Default Value:**
`true`

**Description:**
If `false`, disable CDF update. If `true`, enable CDF update.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CDF_FRAME_END_UPDATE_MODE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_CDF_FRAME_END_UPDATE_MODE_ENUM`: `AMF_VIDEO_ENCODER_AV1_CDF_FRAME_END_UPDATE_MODE_DISABLE`, `AMF_VIDEO_ENCODER_AV1_CDF_FRAME_END_UPDATE_MODE_ENABLE_DEFAULT`

**Default Value:**
`AMF_VIDEO_ENCODER_AV1_CDF_FRAME_END_UPDATE_MODE_DISABLE`

**Description:**
CDF frame end update mode.

---

| Name (Prefix “AMF_VIDEO_ENCODER_AV1_”) | Type         |
| :------------------------------------- | :----------- |
| INPUT_COLOR_PROFILE                    | amf_int64    |
| INPUT_TRANSFER_CHARACTERISTIC          | amf_int64    |
| INPUT_COLOR_PRIMARIES                  | amf_int64    |
| OUTPUT_COLOR_PROFILE                   | amf_int64    |
| OUTPUT_TRANSFER_CHARACTERISTIC         | amf_int64    |
| OUTPUT_COLOR_PRIMARIES                 | amf_int64    |
| INPUT_HDR_METADATA                     | AMFBufferPtr |

<p align="center">
Table 9. Encoder color conversion parameters
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_INPUT_COLOR_PROFILE`

**Values:**
`AMF_VIDEO_CONVERTER_COLOR_PROFILE_ENUM`: `AMF_VIDEO_CONVERTER_COLOR_PROFILE_UNKNOWN`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_601`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_709`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_2020`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_JPEG`,
`AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_601`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_709`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_2020`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_COUNT`

**Default Value:**
`AMF_VIDEO_CONVERTER_COLOR_PROFILE_UNKNOWN`

**Description:**
Color profile of the input surface. SDR - Setting this parameter (`COLOR_PROFILE`) can fully describe a surface for SDR use case. HDR – For HDR use case the `TRANSFER_CHARACTERISTIC`, `COLOR_PRIMARIES`, and `NOMINAL_RANGE` parameters describe the surface.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_INPUT_TRANSFER_CHARACTERISTIC`

**Values:**
`AMF_COLOR_TRANSFER_CHARACTERISTIC_ENUM`: `AMF_COLOR_TRANSFER_CHARACTERISTIC_UNDEFINED`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_BT709`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_UNSPECIFIED`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_RESERVED`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_GAMMA22`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_GAMMA28`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_SMPTE170M`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_SMPTE240M`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_LINEAR`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_LOG`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_LOG_SQRT`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_IEC61966_2_4`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_BT1361_ECG`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_IEC61966_2_1`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_BT2020_10`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_BT2020_12`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_SMPTE2084`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_SMPTE428`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_ARIB_STD_B67`

**Default Value:**
`AMF_COLOR_TRANSFER_CHARACTERISTIC_UNDEFINED`

**Description:**
Characteristic transfer function of the input surface used to perform the mapping between linear light components (tristimulus values) and a nonlinear RGB signal.
Used (alongside `COLOR_PRIMARIES` and `NOMINAL_RANGE` parameters) to describe surface in HDR use case.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_INPUT_COLOR_PRIMARIES`

**Values:**
`AMF_COLOR_PRIMARIES_ENUM`: `AMF_COLOR_PRIMARIES_UNDEFINED`, `AMF_COLOR_PRIMARIES_BT709`, `AMF_COLOR_PRIMARIES_UNSPECIFIED`, `AMF_COLOR_PRIMARIES_RESERVED`, `AMF_COLOR_PRIMARIES_BT470M`, `AMF_COLOR_PRIMARIES_BT470BG`, `AMF_COLOR_PRIMARIES_SMPTE170M`, `AMF_COLOR_PRIMARIES_SMPTE240M`, `AMF_COLOR_PRIMARIES_FILM`, `AMF_COLOR_PRIMARIES_BT2020`, `AMF_COLOR_PRIMARIES_SMPTE428`, `AMF_COLOR_PRIMARIES_SMPTE431`, `AMF_COLOR_PRIMARIES_SMPTE432`, `AMF_COLOR_PRIMARIES_JEDEC_P22`, `AMF_COLOR_PRIMARIES_CCCS`

**Default Value:**
`AMF_COLOR_PRIMARIES_UNDEFINED`

**Description:**
Color space primaries for the input surface which are the maximum red, green, and blue value permitted within the color space.
Used (alongside `TRANSFER_CHARACTERISTIC` and `NOMINAL_RANGE` parameters) to describe surface in HDR use case.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_COLOR_PROFILE`

**Values:**
`AMF_VIDEO_CONVERTER_COLOR_PROFILE_ENUM`: `AMF_VIDEO_CONVERTER_COLOR_PROFILE_UNKNOWN`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_601`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_709`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_2020`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_JPEG`,
`AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_601`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_709`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_FULL_2020`, `AMF_VIDEO_CONVERTER_COLOR_PROFILE_COUNT`

**Default Value:**
`AMF_VIDEO_CONVERTER_COLOR_PROFILE_UNKNOWN`

**Description:**
Color profile of the compressed output stream.
SDR - Setting this parameter (`COLOR_PROFILE`) can fully describe a surface for SDR use case.
HDR – For HDR use case the `TRANSFER_CHARACTERISTIC`, `COLOR_PRIMARIES`, and NOMINAL_RANGE parameters describe the surface.
Determines the optional VUI parameter “matrix_coefficients”.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_TRANSFER_CHARACTERISTIC`

**Values:**
`AMF_COLOR_TRANSFER_CHARACTERISTIC_ENUM`: `AMF_COLOR_TRANSFER_CHARACTERISTIC_UNDEFINED`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_BT709`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_UNSPECIFIED`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_RESERVED`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_GAMMA22`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_GAMMA28`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_SMPTE170M`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_SMPTE240M`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_LINEAR`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_LOG`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_LOG_SQRT`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_IEC61966_2_4`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_BT1361_ECG`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_IEC61966_2_1`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_BT2020_10`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_BT2020_12`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_SMPTE2084`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_SMPTE428`, `AMF_COLOR_TRANSFER_CHARACTERISTIC_ARIB_STD_B67`

**Default Value:**
`AMF_COLOR_TRANSFER_CHARACTERISTIC_UNDEFINED`

**Description:**
Characteristic transfer function of the compressed output stream used to perform the mapping between linear light components (tristimulus values) and a nonlinear RGB signal.

Used (alongside `COLOR_PRIMARIES` and `NOMINAL_RANGE` parameters) to describe surface in HDR use case.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_COLOR_PRIMARIES`

**Values:**
`AMF_COLOR_PRIMARIES_ENUM`: `AMF_COLOR_PRIMARIES_UNDEFINED`, `AMF_COLOR_PRIMARIES_BT709`, `AMF_COLOR_PRIMARIES_UNSPECIFIED`, `AMF_COLOR_PRIMARIES_RESERVED`, `AMF_COLOR_PRIMARIES_BT470M`, `AMF_COLOR_PRIMARIES_BT470BG`, `AMF_COLOR_PRIMARIES_SMPTE170M`, `AMF_COLOR_PRIMARIES_SMPTE240M`, `AMF_COLOR_PRIMARIES_FILM`, `AMF_COLOR_PRIMARIES_BT2020`, `AMF_COLOR_PRIMARIES_SMPTE428`, `AMF_COLOR_PRIMARIES_SMPTE431`, `AMF_COLOR_PRIMARIES_SMPTE432`, `AMF_COLOR_PRIMARIES_JEDEC_P22`, `AMF_COLOR_PRIMARIES_CCCS`

**Default Value:**
`AMF_COLOR_PRIMARIES_UNDEFINED`

**Description:**
Color space primaries for the compressed output surface which are the maximum red, green, and blue value permitted within the color space.

Used (alongside `TRANSFER_CHARACTERISTIC` and `NOMINAL_RANGE` parameters) to describe surface in HDR use case.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_INPUT_HDR_METADATA`

**Values:**
`AMFBuffer`

**Default Value:**
`NULL`

**Description:**
Buffer to retrieve coded sequence header.

---

| Name (Prefix “AMF_VIDEO_ENCODER_AV1_”) | Type      |
| :------------------------------------- | :-------- |
| NUM_TEMPORAL_LAYERS                    | amf_int64 |

<p align="center">
Table 10. Encoder SVC parameters
</p>

**Name:**
`AMF_VIDEO_ENCODER_AV1_NUM_TEMPORAL_LAYERS`

**Values:**
Maximum number of temporal layers supported

**Default Value:**
`1`

**Description:**
Sets the number of temporal layers.  SVC with temporal scalability is enabled when the number of layers is greater than 1. The maximum number of temporal layers supported is determined by the corresponding encoder capability.

Remarks:
   - Actual modification of the number of temporal layers will be delayed until the start of the next temporal GOP.
   - Intra-refresh feature is not supported with SVC.

---

| Name (Prefix “AMF_VIDEO_ENCODER_AV1_”) | Type |
| :------------------------------------- | :--- |
| TL<TL_Num>.QL0.<Parameter_name>        |      |

<p align="center">
Table 11. Encoder SVC per-layer parameters
</p>

---

**Name:**
`TL<TL_Num>.QL0.<Parameter_name>`

**Values:**
Parameter-specific values

**Default Value:**
`N\A`

**Description:**
Configures rate-control parameter per SVC layer.
   - TL_Num — temporal layer number
   - QL0 - quality layer 0
   - Parameter_name — rate-control parameter name (see below with `AMF_VIDEO_ENCODER_AV1_ prefix`)

Rate-control parameters supported:
   - `TARGET_BITRATE`
   - `PEAK_BITRATE`
   - `VBV_BUFFER_SIZE`
   - `FRAMERATE`
   - `Max_Q_INDEX_INTRA`
   - `Max_Q_INDEX_INTER`
   - `Min_Q_INDEX_INTRA`
   - `Min_Q_INDEX_INTER`
   - `Q_INDEX_INTRA`
   - `Q_INDEX_INTER`
   - `FILLER_DATA`
   - `RATE_CONTROL_SKIP_FRAME`
   - `ENFORCE_HRD`
   - `MAX_COMPRESSED_FRAME_SIZE`

---

### Table A-2. Input frame and encoded data parameters

| Name (Prefix “AMF_VIDEO_ENCODER_AV1_”) | Type               |
| :------------------------------------- | :----------------- |
| FORCE_INSERT_SEQUENCE_HEADER           | amf_bool           |
| FORCE_FRAME_TYPE                       | amf_int64          |
| MARK_CURRENT_WITH_LTR_INDEX            | amf_int64          |
| FORCE_LTR_REFERENCE_BITFIELD           | amf_int64          |
| ROI_DATA                               | AMF_SURFACE_GRAY32 |
| STATISTICS_FEEDBACK                    | amf_bool           |
| PSNR_FEEDBACK                          | amf_bool           |
| SSIM_FEEDBACK                          | amf_bool           |
| BLOCK_Q_INDEX_FEEDBACK                 | amf_bool           |

<p align="center">
Table 12. Frame per-submission parameters
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_FORCE_INSERT_SEQUENCE_HEADER`

**Values:**
`true`, `false`

**Default Value:**
`false`

**Description:**
If `true`, force insert sequence header with current frame.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_FORCE_FRAME_TYPE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_FORCE_FRAME_TYPE_ENUM`:
`AMF_VIDEO_ENCODER_AV1_FORCE_FRAME_TYPE_NONE`, `AMF_VIDEO_ENCODER_AV1_FORCE_FRAME_TYPE_KEY`, `AMF_VIDEO_ENCODER_AV1_FORCE_FRAME_TYPE_INTRA_ONLY`, `AMF_VIDEO_ENCODER_AV1_FORCE_FRAME_TYPE_SWITCH`,`AMF_VIDEO_ENCODER_AV1_FORCE_FRAME_TYPE_SHOW_EXISTING`

**Default Value:**
`AMF_VIDEO_ENCODER_AV1_FORCE_FRAME_TYPE_NONE`

**Description:**
Forces the frame type determined by the picture management with the following precedence `KEY`, `INTRA_ONLY`, `SWITCH` and `SHOW_EXISTING`. Force frame type will only take effect to override types with lower precedence.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_MARK_CURRENT_WITH_LTR_INDEX`

**Values:**
`-1` … `MaxOfLTRFrames -1`

**Default Value:**
`N/A`

**Description:**
If != `-1`, the current picture is coded as a long-term reference with the given index.
Remarks:
   - When the user controls `N` LTRs (using the corresponding Create parameter), then the LTR Index the user can assign to a reference picture varies from `0` to `N-1`. By default, the encoder will “use up” available LTR Indices (i.e. assign them to references) even if the user does not request them to be used.
   - When LTR is used with SVC encoding, only base temporal layer pictures can be coded as LTR. In this case, the request to mark the current picture as LTR would be delayed to the next base temporal layer picture if the current picture is in an enhancement layer. If the user submits multiple requests to mark current as LTR between base temporal layer pictures, then only the last request is applied.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_FORCE_LTR_REFERENCE_BITFIELD`

**Values:**
Bitfield `MaxOfLTRFrames (max possible 8 bits)`

**Default Value:**
`0`

**Description:**
Force LTR Reference allowed bitfield. If == `0`, the current picture should predict from the default reference. If != `0`, the current picture should predict from one of the LTRs allowed by the bitfield (bit# = LTR Index#).

Remarks:
   - E.g. if Bit#0 = `1`, then the existing LTR with LTR Index = `0` may be used for reference. The bitfield may allow more than one LTR for reference, in which case the encoder is free to choose which one to use. This bitfield also disallows existing LTRs not enabled by it from current/future reference.
   - E.g. if Bit#1 = `0`, and there is an existing reference with LTR Index = `1`, then this LTR Index will not be used for reference until it is replaced with a newer reference with the same LTR Index.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_ROI_DATA`

**Values:**
Video surface in `AMF_SURFACE_GRAY32` format

**Default Value:**
`N/A`

**Description:**
Importance value for each 64x64 block ranges from `0` (least important) to `10` (most important), stored in 32bit unsigned format.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTICS_FEEDBACK`

**Values:**
`true` (`on`), `false` (`off`)

**Default Value:**
`false`

**Description:**
Signal encoder to collect and feedback encoder statistics.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_PSNR_FEEDBACK`

**Values:**
`true` (`on`), `false` (`off`)

**Default Value:**
`false`

**Description:**
Signal encoder to calculate PSNR score.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_SSIM_FEEDBACK`

**Values:**
`true` (`on`), `false` (`off`)

**Default Value:**
`false`

**Description:**
Signal encoder to calculate SSIM score.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_BLOCK_Q_INDEX_FEEDBACK`

**Values:**
`true` (`on`), `false` (`off`)

**Default Value:**
`false`

**Description:**
Signal encoder to collect and feedback block level QIndex values.

---

| Name (Prefix “AMF_VIDEO_ENCODER_AV1_”) | Type       |
| :------------------------------------- | :--------- |
| OUTPUT_FRAME_TYPE                      | amf_int64  |
| OUTPUT_MARKED_LTR_INDEX                | amf_int64  |
| OUTPUT_REFERENCED_LTR_INDEX_BITFIELD   | amf_int64  |
| OUTPUT_BUFFER_TYPE                     | amf_int64  |
| RECONSTRUCTED_PICTURE                  | AMFSurface |

<p align="center">
Table 13. Encoded data parameters
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_FRAME_TYPE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_FRAME_TYPE_ENUM`: `AMF_VIDEO_ENCODER_AV1_OUTPUT_FRAME_TYPE_KEY`, `AMF_VIDEO_ENCODER_AV1_OUTPUT_FRAME_TYPE_INTRA_ONLY`, `AMF_VIDEO_ENCODER_AV1_OUTPUT_FRAME_TYPE_INTER`, `AMF_VIDEO_ENCODER_AV1_OUTPUT_FRAME_TYPE_SWITCH`, `AMF_VIDEO_ENCODER_AV1_OUTPUT_FRAME_TYPE_SHOW_EXISTING`

**Default Value:**
`N/A`

**Description:**
Type of encoded frame.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_MARKED_LTR_INDEX`

**Values:**
`-1` … `MaxOfLTRFrames -1`

**Default Value:**
`N/A`

**Description:**
Marked as LTR Index. If != `-1`, then this picture was coded as a long-term reference with this LTR Index.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_REFERENCED_LTR_INDEX_BITFIELD`

**Values:**
Bitfield `MaxOfLTRFrames (max possible 8 bits)`

**Default Value:**
`N/A`

**Description:**
Referenced LTR Index bitfield. If != `0`, this picture was coded to reference long-term references. The enabled bits identify the LTR Indices of the referenced pictures (e.g. if Bit #0 = `1`, then LTR Index 0 was used as a reference when coding this picture).

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_BUFFER_TYPE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_OUTPUT_BUFFER_TYPE_ENUM`: `AMF_VIDEO_ENCODER_AV1_OUTPUT_BUFFER_TYPE_FRAME`,`AMF_VIDEO_ENCODER_AV1_OUTPUT_BUFFER_TYPE_TILE`, `AMF_VIDEO_ENCODER_AV1_OUTPUT_BUFFER_TYPE_TILE_LAST`

**Default Value:**
`N\A`

**Description:**
Encoder output buffer type.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_RECONSTRUCTED_PICTURE`

**Values:**
`AMFSurface`

**Default Value:**
`N\A`

**Description:**
Returns reconstructed picture as an `AMFSurface` attached to the output buffer as property `AMF_VIDEO_ENCODER_RECONSTRUCTED_PICTURE` of `AMFInterface` type.

---

### Table A-3. Encoder capabilities exposed in AMFCaps interface

| Name (prefix with AMF_VIDEO_ENCODER_AV1_CAP_) | Type      |
| :-------------------------------------------- | :-------- |
| NUM_OF_HW_INSTANCES                           | amf_int64 |
| MAX_THROUGHPUT                                | amf_int64 |
| REQUESTED_THROUGHPUT                          | amf_int64 |
| COLOR_CONVERSION                              | amf_int64 |
| PRE_ANALYSIS                                  | amf_bool  |
| MAX_BITRATE                                   | amf_int64 |
| MAX_PROFILE                                   | amf_int64 |
| MAX_LEVEL                                     | amf_int64 |
| MAX_NUM_TEMPORAL_LAYERS                       | amf_int64 |
| MAX_NUM_LTR_FRAMES                            | amf_int64 |
| SUPPORT_TILE_OUTPUT                           | amf_bool  |
| WIDTH_ALIGNMENT_FACTOR                        | amf_int64 |
| HEIGHT_ALIGNMENT_FACTOR                       | amf_int64 |
| BFRAMES                                       | amf_bool  |

<p align="center">
Table 14. Encoder capabilities exposed in AMFCaps interface
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_NUM_OF_HW_INSTANCES`

**Values:**
`0`... `number of instances - 1`


**Description:**
Number of HW encoder instances.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_MAX_THROUGHPUT`

**Values:**
Integers, >=0

**Description:**
MAX throughput for AV1 encoder in MB (16 x 16 pixels).

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_REQUESTED_THROUGHPUT`

**Values:**
`0`... `number of instances - 1`


**Description:**
Currently total requested throughput for AV1 encode in MB (16 x 16 pixels).

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_COLOR_CONVERSION`

**Values:**
`AMF_ACCELERATION_TYPE`


**Description:**
Type of supported color conversion.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_PRE_ANALYSIS`

**Values:**
`true`, `false`


**Description:**
Pre analysis module is available.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_MAX_BITRATE`

**Values:**
Integers, >=0
**Description:**
Maximum bit rate in bits.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_MAX_PROFILE`

**Values:**
`AMF_VIDEO_ENCODER_AV1_PROFILE_ENUM`: `AMF_VIDEO_ENCODER_AV1_PROFILE_MAIN`


**Description:**
Maximum value of code profile.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_MAX_LEVEL`

**Values:**
`AMF_VIDEO_ENCODER_AV1_LEVEL_ENUM`:
`AMF_VIDEO_ENCODER_AV1_LEVEL_2_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_2_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_2_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_2_3`, `AMF_VIDEO_ENCODER_AV1_LEVEL_3_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_3_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_3_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_3_3`, `AMF_VIDEO_ENCODER_AV1_LEVEL_4_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_4_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_4_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_4_3`, `AMF_VIDEO_ENCODER_AV1_LEVEL_5_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_5_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_5_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_5_3`, `AMF_VIDEO_ENCODER_AV1_LEVEL_6_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_6_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_6_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_6_3`, `AMF_VIDEO_ENCODER_AV1_LEVEL_7_0`, `AMF_VIDEO_ENCODER_AV1_LEVEL_7_1`, `AMF_VIDEO_ENCODER_AV1_LEVEL_7_2`, `AMF_VIDEO_ENCODER_AV1_LEVEL_7_3`


**Description:**
Maximum value of codec level.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_MAX_NUM_TEMPORAL_LAYERS`

**Values:**
`1` … `Maximum number of temporal layers supported`


**Description:**
The cap of maximum number of temporal layers.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_MAX_NUM_LTR_FRAMES`

**Values:**
Integers, >=0

**Description:**
The cap of maximum number of LTR frames. This value is calculated based on current value of `AMF_VIDEO_ENCODER_AV1_MAX_NUM_TEMPORAL_LAYERS`.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_SUPPORT_TILE_OUTPUT`

**Values:**
`true`, `false`


**Description:**
If tile output is supported.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_WIDTH_ALIGNMENT_FACTOR`

**Values:**
Integers, >=0


**Description:**
This is used for querying the av1 picture width alignment factor

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_HEIGHT_ALIGNMENT_FACTOR`

**Values:**
Integers, >=0


**Description:**
This is used for querying the av1 picture height alignment factor

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_CAP_BFRAMES`

**Values:**
`true`, `false`


**Description:**
This is used for querying av1 b frame support

---

### Table A-4. Encoder statistics feedback

| Statistic Name (prefix "AMF_VIDEO_ENCODER_AV1") | Type      |
| :---------------------------------------------- | :---------|
| STATISTIC_FRAME_Q_INDEX                         | amf_int64 |
| STATISTIC_AVERAGE_Q_INDEX                       | amf_int64 |
| STATISTIC_MAX_Q_INDEX                           | amf_int64 |
| STATISTIC_MIN_Q_INDEX                           | amf_int64 |
| STATISTIC_PIX_NUM_INTRA                         | amf_int64 |
| STATISTIC_PIX_NUM_INTER                         | amf_int64 |
| STATISTIC_PIX_NUM_SKIP                          | amf_int64 |
| STATISTIC_BITCOUNT_RESIDUAL                     | amf_int64 |
| STATISTIC_BITCOUNT_MOTION                       | amf_int64 |
| STATISTIC_BITCOUNT_INTER                        | amf_int64 |
| STATISTIC_BITCOUNT_INTRA                        | amf_int64 |
| STATISTIC_BITCOUNT_ALL_MINUS_HEADER             | amf_int64 |
| STATISTIC_MV_X                                  | amf_int64 |
| STATISTIC_MV_Y                                  | amf_int64 |
| STATISTIC_RD_COST_FINAL                         | amf_int64 |
| STATISTIC_RD_COST_INTRA                         | amf_int64 |
| STATISTIC_RD_COST_INTER                         | amf_int64 |
| STATISTIC_SAD_FINAL                             | amf_int64 |
| STATISTIC_SAD_INTRA                             | amf_int64 |
| STATISTIC_SAD_INTER                             | amf_int64 |
| STATISTIC_SSE                                   | amf_int64 |
| STATISTIC_VARIANCE                              | amf_int64 |

<p align="center">
Table 15. Encoder statistics feedback
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_FRAME_Q_INDEX`

**Description:**
Rate control base frame/initial QIndex.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_AVERAGE_Q_INDEX`

**Description:**
Average QIndex of all encoded SBs in a picture. Value may be different from the one reported by bitstream analyzer when there are skipped SBs.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_MAX_Q_INDEX`

**Description:**
Max QIndex among all encoded SBs in a picture. Value may be different from the one reported by bitstream analyzer when there are skipped SBs.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_MIN_Q_INDEX`

**Description:**
Min QIndex among all encoded SBs in a picture. Value may be different from the one reported by bitstream analyzer when there are skipped SBs.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_PIX_NUM_INTRA`

**Description:**
Number of the intra encoded pixels.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_PIX_NUM_INTER`

**Description:**
Number of the inter encoded pixels.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_PIX_NUM_SKIP`

**Description:**
Number of the skip mode pixels.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_BITCOUNT_RESIDUAL`

**Description:**
The bit count that corresponds to residual data.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_BITCOUNT_MOTION`

**Description:**
The bit count that corresponds to motion vectors.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_BITCOUNT_INTER`

**Description:**
The bit count that are assigned to inter SBs.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_BITCOUNT_INTRA`

**Description:**
The bit count that are assigned to intra SBs.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_BITCOUNT_ALL_MINUS_HEADER`

**Description:**
The bit count of the bitstream excluding header.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_MV_X`

**Description:**
Accumulated absolute values of horizontal MV's.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_MV_Y`

**Description:**
Accumulated absolute values of vertical MV's.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_RD_COST_FINAL`

**Description:**
Frame level final RD cost for full encoding.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_RD_COST_INTRA`

**Description:**
Frame level intra RD cost for full encoding.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_RD_COST_INTER`

**Description:**
Frame level inter RD cost for full encoding.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_SATD_FINAL`

**Description:**
Frame level final SAD for full encoding.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_SATD_INTRA`

**Description:**
Frame level intra SAD for full encoding.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_SATD_INTER`

**Description:**
Frame level inter SAD for full encoding.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_SSE`

**Description:**
Frame level SSE (only calculated for AV1).

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_VARIANCE`

**Description:**
Frame level variance for full encoding.

---

| Statistic Name    | Type       |
| :---------------- | :--------- |
| BLOCK_Q_INDEX_MAP | AMFSurface |

<p align="center">
Table 16. Encoder block level feedback
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_BLOCK_Q_INDEX_MAP`

**Description:**
`AMFSurface` of format `AMF_SURFACE_GRAY32` containing block level QIndex values.

---

### Table A-5. Encoder PSNR/SSIM feedback

| Statistic Name (prefix "AMF_VIDEO_ENCODER_AV1") | Type       |
| :---------------------------------------------- | :--------- |
| STATISTIC_PSNR_Y                                | amf_double |
| STATISTIC_PSNR_U                                | amf_double |
| STATISTIC_PSNR_V                                | amf_double |
| STATISTIC_PSNR_ALL                              | amf_double |
| STATISTIC_SSIM_Y                                | amf_double |
| STATISTIC_SSIM_U                                | amf_double |
| STATISTIC_SSIM_V                                | amf_double |
| STATISTIC_SSIM_ALL                              | amf_double |

<p align="center">
Table 17. Encoder statistics feedback
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_PSNR_Y`

**Description:**
PSNR Y.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_PSNR_U`

**Description:**
PSNY U.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_PSNR_V`

**Description:**
PSNR V.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_PSNR_ALL`

**Description:**
PSNR YUV.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_SSIM_Y`

**Description:**
SSIM Y.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_SSIM_U`

**Description:**
SSIM U.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_SSIM_V`

**Description:**
SSIM V.

---

**Name:**
`AMF_VIDEO_ENCODER_AV1_STATISTIC_SSIM_ALL`

**Description:**
SSIM YUV.

---


