#### Advanced Micro Devices

# Advanced Media Framework – h.264 Video Encoder

#### Programming Guide

---

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---

### Contents

- [Advanced Media Framework – h.264 Video Encoder](#advanced-media-framework--h264-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 VCE-AVC Component](#2-amf-video-encoder-vce-avc-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 SVC Properties](#224-svc-properties)
    - [2.2.5 ROI Feature](#225-roi-feature)
    - [2.2.6 Encoder Statistics Feedback](#226-encoder-statistics-feedback)
    - [2.2.7 Picture Transfer Mode](#227-picture-transfer-mode)
    - [2.2.8 LTR Properties](#228-ltr-properties)
    - [2.2.9 SmartAccess Video](#229-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)](#322d3d-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)
    - [Table A-6. Deprecated](#table-a-6-deprecated)


## 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 H.264 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 H.264 elementary bitstream.

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

The component provides four 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>

Note: User can override the default settings for these pre-defined usages in Table A-3. Default values of parameters.

## 2 AMF Video Encoder VCE-AVC Component

The AMF Video Encoder VCE-AVC component provides hardware accelerated AVC/SVC encoding using AMD’s VCE.

To instantiate the AMF Video Encoder component, call the `AMFFactory::CreateComponent` method passing `AMFVideoEncoderVCE_AVC` or `AMFVideoEncoderVCE_SVC` component IDs defined in the `public/include/components/VideoEncoderVCE.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.

In the Transcoding mode the encoder needs to accept at least 3 input frames before any output is produced. In low latency modes output becomes available as soon as the first submitted frame is encoded.

### 2.2 Encode Parameters

Annex A provides the detailed description of encoding parameters (i.e., encoder properties) exposed by the Video Encoder VCE-AVC component for the following four usages:

- Transcoding mode,
- Ultra-low latency mode,
- Low Latency mode,
- Webcam mode,
- HQ mode, and
- HQLL mode.

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

#### 2.2.1 Static Properties

Static properties (e.g., profile, 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 SVC Properties

Scalable Video Coding (SVC) is enabled by setting `AMF_VIDEO_ENCODER_NUM_TEMPORAL_ENHANCMENT_LAYERS` to a value that is greater than `1`. `AMF_VIDEO_ENCODER_NUM_TEMPORAL_ENHANCMENT_LAYER` is a dynamic property and can be changed at any time during an encoding session. To ensure proper support on Radeon RX 5000 Series or newer GPUs and Ryzen 2000 U/H series or newer APUs, `AMF_VIDEO_ENCODER_MAX_NUM_TEMPORAL_LAYERS` needs to be set before initializing the encoder to a value that is not smaller than the number of temporal enhancement layers. As an example, the maximum number of temporal layers shall be set to 4 if the number of temporal enhancement 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.TargetBitrate`

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

`TL1.QL0.TargetBitrate`

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 on VCE 1.0. “QL0” must be used for quality layers.

### 2.2.5 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 16x16 macro block, ranging from `0` (least important) to `10` (most important), stored in 32bit unsigned format. Refer to SimpleROI sample application for further implementation details.

### 2.2.6 Encoder Statistics Feedback

If an application sets the `AMF_VIDEO_ENCODER_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-4. This feature is supported by Radeon RX 5000 Series or newer GPUs as well as Ryzen 2000 U/H series or newer APUs.

### 2.2.7 Picture Transfer Mode

If an application enables `AMF_VIDEO_ENCODER_PICTURE_TRANSFER_MODE` for a specific input picture, it can dump out the reconstructed picture after encoding and/or it can inject a picture to be used as the reference picture during the encoding. It is worth noting that reference picture injection is a feature that is intended for advanced algorithm testing and exploration. It needs to be used with care since the internal DPB in the current encoding session will be overridden by the injected reference picture(s). The reader can refer to `SimpleFrameInjection` sample application for further implementation details. This feature is supported by Radeon RX 5000 Series or newer GPUs as well as Ryzen 2000 U/H series or newer APUs.

### 2.2.8 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 AVC, maximum of `16` reference frames are supported according to the spec. These `16` reference frames are shared by SVC and LTR.

To use LTR, you need to set these properties as Static Properties:

`AMF_VIDEO_ENCODER_MAX_LTR_FRAMES`, Max number of LTR frames.

`AMF_VIDEO_ENCODER_LTR_MODE` default = `AMF_VIDEO_ENCODER_LTR_MODE_RESET_UNUSED`; remove/keep unused LTRs (not specified in property `AMF_VIDEO_ENCODER_FORCE_LTR_REFERENCE_BITFIELD`)

The `LTR_MODE` has two options:

```cpp
enum AMF_VIDEO_ENCODER_LTR_MODE_ENUM
{
   AMF_VIDEO_ENCODER_LTR_MODE_RESET_UNUSED      = 0,
   AMF_VIDEO_ENCODER_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_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_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_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_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.

Please note that LTR and B-frames (including fixed B-frames set through `AMF_VIDEO_ENCODER_B_PIC_PATTERN` and adaptive B-frames set through `AMF_VIDEO_ENCODER_ADAPTIVE_MINIGOP`) cannot be used simultaneously in the encoder. The encoder will check parameter settings during operation. If both LTR and B-frames are detected as enabled, the encoder will disable LTR.

### 2.2.9 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 VCE-AVC 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:**
`AVC` or `H264`, `HEVC` or `H265`, `AV1`

**Default Values:**
`AVC`

**Description:**
Specify codec type.

---

**Name:**
`OUTPUT`

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

**Default Value:**
`NULL`

**Description:**
Output 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`, `Vulkan`

**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:**
`AVC` or `H264`, `HEVC` or `H265`, `AV1`

**Default Value:**
`AVC`

**Description:**
Codec name.

---

**Name:**
`OUTPUT`

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

**Default Value:**
`NULL`

**Description:**
Output H.264 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:**
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.h264 –codec AVC -width 1280 -height 720`

This command transcodes H264 elementary stream to H.264 video. Encoder is created with “Transcoding” usage.

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

`VCEEncoderD3D.exe -output VideoSample_1024x768.h264 -width 1024 -height 768 -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 500kbits/sec.

## 4 Annex A: Encoding & frame parameters description

### Table A-1. Encoder parameters

| Name (prefix "AMF_VIDEO_ENCODER_") | Type      |
| :--------------------------------- | :-------- |
| USAGE                              | amf_int64 |
| INSTANCE_INDEX                     | amf_int64 |
| PROFILE                            | amf_int64 |
| PROFILE_LEVEL                      | amf_int64 |
| MAX_LTR_FRAMES                     | amf_int64 |
| LTR_MODE                           | amf_int64 |
| LOWLATENCY_MODE                    | amf_bool  |
| FRAMESIZE                          | AMFSize   |
| ASPECT_RATIO                       | AMFRatio  |
| MAX_NUM_REFRAMES                   | amf_int64 |
| MAX_CONSECUTIVE_BPICTURES          | amf_int64 |
| ADAPTIVE_MINIGOP                   | amf_bool  |
| PRE_ANALYSIS_ENABLE                | amf_bool  |
| COLOR_BIT_DEPTH                    | amf_int64 |
| 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_USAGE`

**Values:**
`AMF_VIDEO_ENCODER_USAGE_ENUM`: `AMF_VIDEO_ENCODER_USAGE_TRANSCONDING`, `AMF_VIDEO_ENCODER_USAGE_TRANSCODING`, `AMF_VIDEO_ENCODER_USAGE_ULTRA_LOW_LATENCY`, `AMF_VIDEO_ENCODER_USAGE_LOW_LATENCY`,
`AMF_VIDEO_ENCODER_USAGE_WEBCAM`, `AMF_VIDEO_ENCODER_USAGE_HIGH_QUALITY`, `AMF_VIDEO_ENCODER_USAGE_LOW_LATENCY_HIGH_QUALITY`

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

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

---

**Name:**
`AMF_VIDEO_ENCODER_INSTANCE_INDEX`

**Values:**
`0`, `1`

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

**Description:**
Selects the encoder engine used for encoding.

---

**Name:**
`AMF_VIDEO_ENCODER_PROFILE`

**Values:**
`AMF_VIDEO_ENCODER_PROFILE_ENUM`: `AMF_VIDEO_ENCODER_PROFILE_BASELINE`, `AMF_VIDEO_ENCODER_PROFILE_MAIN`, `AMF_VIDEO_ENCODER_PROFILE_HIGH`

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

**Description:**
Selects the H.264 profile.

---

**Name:**
`AMF_VIDEO_ENCODER_PROFILE_LEVEL`

**Values:**
`AMF_VIDEO_ENCODER_H264_LEVEL_ENUM`: `AMF_H264_LEVEL__1`,`AMF_H264_LEVEL__1_1`, `AMF_H264_LEVEL__1_2`, `AMF_H264_LEVEL__1_3`, `AMF_H264_LEVEL__2`, `AMF_H264_LEVEL__2_1`, `AMF_H264_LEVEL__2_2`, `AMF_H264_LEVEL__3`, `AMF_H264_LEVEL__3_1`, `AMF_H264_LEVEL__3_2`, `AMF_H264_LEVEL__4`, `AMF_H264_LEVEL__4_1`, `AMF_H264_LEVEL__4_2`, `AMF_H264_LEVEL__5`, `AMF_H264_LEVEL__5_1`, `AMF_H264_LEVEL__5_2`, `AMF_H264_LEVEL__6`, `AMF_H264_LEVEL__6_1`, `AMF_H264_LEVEL__6_2`

**Default Value:**
`AMF_H264_LEVEL__4_2`

**Description:**
Selects the H.264 profile level. Automatically adjusted upwards based on frame size.

---

**Name:**
`AMF_VIDEO_ENCODER_MAX_LTR_FRAMES`

**Values:**
`0` … `2`

**Default Value:**
`0`

**Description:**
The number of long-term references controlled by the user.
Remarks:
 -	When == `0`, the encoder may or may not use LTRs during encoding.
 -	When > `0`, the user has control over all LTR.
 -	With user control of LTR, B-pictures and Intra-refresh features are not supported.
 -	The actual maximum number of LTRs allowed depends on H.264 Annex A Table A-1 Level limits, which defines dependencies between the H.264 Level number, encoding resolution, and DPB size. The DPB size limit impacts the maximum number of LTR allowed.

---

**Name:**
`AMF_VIDEO_ENCODER_LTR_MODE`

**Values:**
`0`(reset unused) , `1` (keep unused)

**Default Value:**
`0`

**Description:**
Removes/keeps unused LTRs not specified inside the LTR reference bitfield.

---

**Name:**
`AMF_VIDEO_ENCODER_LOWLATENCY_MODE`

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

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

**Description:**
Enables low latency mode in the encoder and switches POC mode to `2`.

---

**Name:**
`AMF_VIDEO_ENCODER_FRAMESIZE`

**Values:**
Width: `64` – `4096`
Height: `64` – `4096`

**Default Value:**
`(0,0)`

**Description:**
Frame width and height in pixels, maximum values are hardware-specific, should be queried through AMFCaps.

---

**Name:**
`AMF_VIDEO_ENCODER_ASPECT_RATIO`

**Values:**
`(1, 1)` ... `(INT_MAX, INT_MAX)`

**Default Value:**
`(1,1)`

**Description:**
Pixel aspect ratio.

---

**Name:**
`AMF_VIDEO_ENCODER_MAX_NUM_REFRAMES`

**Values:**
`0`...`16`

**Default Value:**
`4`

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

---

**Name:**
`AMF_VIDEO_ENCODER_MAX_CONSECUTIVE_BPICTURES`

**Values:**
`0`...`3`

**Default Value:**
`0`

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

---

**Name:**
`AMF_VIDEO_ENCODER_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_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_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:**
`8`

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

---

**Name:**
`AMF_VIDEO_ENCODER_MAX_NUM_TEMPORAL_LAYERS`

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

**Default Value:**
`1`

**Description:**
Sets the maximum number of temporal layers. It shall not be exceeded by the number of temporal enhancement layers. The maximum number of temporal layers supported is determined by the corresponding encoder capability. This property is not supported on GPUs prior to Radeon RX 5000 Series or APUs prior to Ryzen 2000 U/H series.

---

**Name:**
`AMF_VIDEO_ENCODER_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_") | 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 |

<p align="center">
Table 5. Encoder color conversion parameters
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_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`

**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_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_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_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`

**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_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_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 (prefix "AMF_VIDEO_ENCODER_") | Type      |
| :--------------------------------- | :-------- |
| TARGET_BITRATE                     | amf_int64 |
| PEAK_BITRATE                       | amf_int64 |
| RATE_CONTROL_METHOD                | amf_int64 |
| RATE_CONTROL_SKIP_FRAME_ENABLE     | amf_bool  |
| MIN_QP                             | amf_int64 |
| MAX_QP                             | amf_int64 |
| QP_I                               | amf_int64 |
| QP_P                               | amf_int64 |
| QP_B                               | amf_int64 |
| QVBR_QUALITY_LEVEL                 | amf_int64 |
| FRAMERATE                          | AMFRate   |
| VBV_BUFFER_SIZE                    | amf_int64 |
| INITIAL_VBV_BUFFER_FULLNESS        | amf_int64 |
| ENFORCE_HRD                        | amf_bool  |
| MAX_AU_SIZE                        | amf_int64 |
| B_PIC_DELTA_QP                     | amf_int64 |
| REF_B_PIC_DELTA_QP                 | amf_int64 |
| PREENCODE_ENABLE                   | amf_int64 |
| FILLER_DATA_ENABLE                 | amf_bool  |
| ENABLE_VBAQ                 | amf_bool  |

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

---

**Name:**
`AMF_VIDEO_ENCODER_TARGET_BITRATE`

**Values:**
`10 000` - `100 000 000` bit/s

**Default Value:**
`20` mbit/s

**Description:**
Sets the target bitrate.

---

**Name:**
`AMF_VIDEO_ENCODER_PEAK_BITRATE`

**Values:**
`10 000` - `100 000 000` bit/s

**Default Value:**
`30` mbit/s

**Description:**
Sets the peak bitrate.

---

**Name:**
`AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD`

**Values:**
`AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_ENUM`:
`AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_UNKNOWN`, `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_CONSTANT_QP`, `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_CBR`, `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_PEAK_CONSTRAINED_VBR`, `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_LATENCY_CONSTRAINED_VBR`, `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_QUALITY_VBR`, `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_HIGH_QUALITY_VBR`, `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_HIGH_QUALITY_CBR`

**Default Value associated with usages:**
   - Transcoding: `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_PCVBR`
   - Ultra low latency: `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_LCVBR`
   - Low latency: `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_PCVBR`
   - Webcam: `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_PCVBR`
   - HQ: `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_QVBR`/ `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_PCVBR`
   - HQLL: `AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_CBR`

**Description:**
Selects the rate control method:
 - CQP – Constrained QP,
 - CBR - Constant Bitrate,
 - VBR - Peak Constrained VBR,
 - VBR_LAT - Latency Constrained VBR,
 - 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. Some RC parameters are not enabled with SVC encoding (e.g. all parameters related to B-pictures).
 - 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 or VMAF).

---

**Name:**
`AMF_VIDEO_ENCODER_RATE_CONTROL_SKIP_FRAME_ENABLE`

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

**Default Value:**
Depends on `USAGE`

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

---

**Name:**
`AMF_VIDEO_ENCODER_MIN_QP`

**Values:**
`0` – `51`

**Default Value:**
`0`

**Description:**
Sets the minimum QP.

---

**Name:**
`AMF_VIDEO_ENCODER_MAX_QP`

**Values:**
`0` – `51`

**Default Value:**
`51`

**Description:**
Sets the maximum QP.

---

**Name:**
`AMF_VIDEO_ENCODER_QP_I`

**Values:**
`0` – `51`

**Default Value:**
`22`

**Description:**
Sets the constant QP for I-pictures.
Remarks: Only available for CQP rate control method.

---

**Name:**
`AMF_VIDEO_ENCODER_QP_P`

**Values:**
`0` – `51`

**Default Value:**
`22`

**Description:**
Sets the constant QP for P-pictures.
Remarks: Only available for CQP rate control method.

---

**Name:**
`AMF_VIDEO_ENCODER_QP_B`

**Values:**
`0` – `51`

**Default Value:**
`22`

**Description:**
Sets the constant QP for B-pictures.
Remarks: Only available for CQP rate control method.

---

**Name:**
`AMF_VIDEO_ENCODER_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_FRAMERATE`

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

**Default Value:**
`30` fps

**Description:**
Frame rate numerator.

---

**Name:**
`AMF_VIDEO_ENCODER_VBV_BUFFER_SIZE`

**Values:**
`1000` – `100 000 000`

**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.

---

**Name:**
`AMF_VIDEO_ENCODER_INITIAL_VBV_BUFFER_FULLNESS`

**Values:**
`0` - `64`

**Default Value:**
`64`

**Description:**
Sets the initial VBV buffer fullness.

---

**Name:**
`AMF_VIDEO_ENCODER_ENFORCE_HRD`

**Values:**
`true`, `false` (`On`, `Off`)

**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_ENABLE_VBAQ`

**Values:**
`true`, `false` (`On`, `Off`)

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

**Description:**
Note: Cannot use when `RATE_CONTROL_METHOD` is CQP.
 - VBAQ stands for *Variance Based Adaptive Quantization*.
 - The basic idea of VBAQ: Human visual system is typically less sensitive to artifacts in highly textured area. In VBAQ mode, we use pixel variance to indicate the complexity of spatial texture. This allows us to allocate more bits to smoother areas. Enabling such feature leads to improvements in subjective visual quality with some content.Note: Cannot use when `RATE_CONTROL_METHOD` is CQP.

---

**Name:**
`AMF_VIDEO_ENCODER_MAX_AU_SIZE`

**Values:**
`0` - `100 000 000` bits

**Default Value:**
`0`

**Description:**
Maximum AU size in bits.

---

**Name:**
`AMF_VIDEO_ENCODER_B_PIC_DELTA_QP`

**Values:**
`-10` ... `10`

**Default Value associated with usages:**
   - Transcoding: `4`
   - Ultra low latency: `0`
   - Low latency: `4`
   - Webcam: `4`
   - HQ: `4`
   - HQLL: `4`

**Description:**
Selects the delta QP of non-reference B pictures with respect to I pictures. This feature is not supported by VCE 1.0.
`BPicturesDeltaQP`, `ReferenceBPicturesDeltaQP`, `IntraRefreshNumMBsPerSlot`, `BPicturesPattern` and `BReferenceEnable` parameters are available only when:
   - `MaxOfReferenceFrames` is greater than `1`
   - `NumOfLTR` is `0` (LTR is not used)

---

**Name:**
`AMF_VIDEO_ENCODER_REF_B_PIC_DELTA_QP`

**Values:**
`-10` ... `10`

**Default Value associated with usages:**
   - Transcoding: `2`
   - Ultra low latency: `0`
   - Low latency: `2`
   - Webcam: `2`
   - HQ: `2`
   - HQLL: `2`

**Description:**
Selects delta QP of reference B pictures with respect to I pictures. This feature is not supported by VCE 1.0.
`BPicturesDeltaQP`, `ReferenceBPicturesDeltaQP`, `IntraRefreshNumMBsPerSlot`, `BPicturesPattern` and `BReferenceEnable` parameters are available only when:
   - `MaxOfReferenceFrames` is greater than `1`
   - `NumOfLTR` is `0` (LTR is not used)

---

**Name:**
`AMF_VIDEO_ENCODER_PREENCODE_ENABLE`

**Values:**
`AMF_VIDEO_ENCODER_PREENCODE_DISABLED`, `AMF_VIDEO_ENCODER_PREENCODE_ENABLED`

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

**Description:**
Enables or disables rate control pre-analysis.

---

**Name:**
`AMF_VIDEO_ENCODER_FILLER_DATA_ENABLE`

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

**Default Value:**
`false`

**Description:**
Enables/disables filler data to maintain constant bit rate.

---

| Name (prefix "AMF_VIDEO_ENCODER_") | Type      |
| :--------------------------------- | :-------- |
| HEADER_INSERTION_SPACING           | amf_int64 |
| IDR_PERIOD                         | amf_int64 |
| INTRA_PERIOD                       | amf_int64 |
| DE_BLOCKING_FILTER                 | amf_bool  |
| INTRA_REFRESH_NUM_MBS_PER_SLOT     | amf_int64 |
| SLICES_PER_FRAME                   | amf_int64 |
| B_PIC_PATTERN                      | amf_int64 |
| B_REFERENCE_ENABLE                 | amf_int64 |
| CABAC_ENABLE                       | amf_int64 |
| HIGH_MOTION_QUALITY_BOOST_ENABLE   | amf_bool  |


<p align="center">
Table 7. Encoder picture-control parameters
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_HEADER_INSERTION_SPACING`

**Values:**
`0` … `1000`

**Default Value:**
`0`

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

---

**Name:**
`AMF_VIDEO_ENCODER_IDR_PERIOD`

**Values:**
`0` … `1000`

**Default Value associated with usages:**
   - Transcoding: `240`
   - Ultra low latency: `240`
   - Low latency: `240`
   - Webcam: `30`
   - HQ: `240`
   - HQLL: `120`

**Description:**
Sets IDR period. IDRPeriod = `0` turns IDR off.
To get SPS/PPS for every IDR, header insertion spacing has to be the same as IDR period.

---


**Name:**
`AMF_VIDEO_ENCODER_INTRA_PERIOD`

**Values:**
`0` – `1000`

**Default Value:**
`0`

**Description:**
Number of frames between two intra frames.

---


**Name:**
`AMF_VIDEO_ENCODER_DE_BLOCKING_FILTER`

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

**Default Value:**
`true`

**Description:**
Enable/disable the de-blocking filter.

---

**Name:**
`AMF_VIDEO_ENCODER_INTRA_REFRESH_NUM_MBS_PER_SLOT`

**Values:**
`0` - #MBs per frame

**Default Value associated with usages:**
   - Transcoding: `0`
   - Ultra low latency: `255`
   - Low latency: `255`
   - Webcam: `0`
   - HQ: `0`
   - HQLL: `0`

**Description:**
Sets the number of slices per frame.
`BPicturesDeltaQP`, `ReferenceBPicturesDeltaQP`, `IntraRefreshNumMBsPerSlot`, `BPicturesPattern` and `BReferenceEnable` parameters are available only when:
   - `MaxOfReferenceFrames` is greater than `1`
   - `NumOfLTR` is `0` (LTR is not used)

---

**Name:**
`AMF_VIDEO_ENCODER_SLICES_PER_FRAME`

**Values:**
`1` - #MBs per frame

**Default Value:**
`1`

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

---

**Name:**
`AMF_VIDEO_ENCODER_B_PIC_PATTERN`

**Values:**
`0`, `1`, `2`, `3`

**Default Value:**
`0`

**Description:**
Sets the number of consecutive B-pictures in a GOP.  BPicturesPattern = `0` indicates that B-pictures are not used. This feature is not supported by VCE 1.0.
`BPicturesDeltaQP`, `ReferenceBPicturesDeltaQP`, `IntraRefreshNumMBsPerSlot`, `BPicturesPattern` and `BReferenceEnable` parameters are available only when:
   - `MaxOfReferenceFrames` is greater than `1`
   - `NumOfLTR` is `0` (LTR is not used)

---

**Name:**
`AMF_VIDEO_ENCODER_B_REFERENCE_ENABLE`

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

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

**Description:**
Enables or disables using B-pictures as references. This feature is not supported by VCE 1.0.
`BPicturesDeltaQP`, `ReferenceBPicturesDeltaQP`, `IntraRefreshNumMBsPerSlot`, `BPicturesPattern` and `BReferenceEnable` parameters are available only when:
   - `MaxOfReferenceFrames` is greater than `1`
   - `NumOfLTR` is `0` (LTR is not used)

---

**Name:**
`AMF_VIDEO_ENCODER_CABAC_ENABLE`

**Values:**
`AMF_VIDEO_ENCODER_CODING_ENUM`: `AMF_VIDEO_ENCODER_UNDEFINED`, `AMF_VIDEO_ENCODER_CABAC`, `AMF_VIDEO_ENCODER_CALV`

**Default Value:**
`AMF_VIDEO_ENCODER_UNDEFINED`

**Description:**
Encoder coding method, when Undefined is selected, the behavior is profile-specific: CALV for Baseline, CABAC for Main and High.

---

**Name:**
`AMF_VIDEO_ENCODER_HIGH_MOTION_QUALITY_BOOST_ENABLE`

**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. It pre-analysis the motion of the video and use the information for better encoding.

---

| Name (prefix "AMF_VIDEO_ENCODER_") | Type         |
| :--------------------------------- | :----------  |
| EXTRADATA                          | AMFBufferPtr |
| SCANTYPE                           | amf_int64    |
| QUALITY_PRESET                     | amf_int64    |
| FULL_RANGE_COLOR                   | amf_bool     |
| PICTURE_TRANSFER_MODE              | amf_int64    |
| QUERY_TIMEOUT                      | amf_int64    |
| INPUT_QUEUE_SIZE                   | amf_int64    |
| OUTPUT_MODE                        | amf_int64    |
| PSNR_FEEDBACK                      | amf_bool     |
| SSIM_FEEDBACK                      | amf_bool     |
| BLOCK_QP_FEEDBACK                  | amf_bool     |

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

---

**Name:**
`AMF_VIDEO_ENCODER_EXTRADATA`

**Values:**
`AMFBufferPtr`

**Default Value:**
`NULL`

**Description:**
SPS/PPS buffer in Annex B format - read-only.

---

**Name:**
`AMF_VIDEO_ENCODER_SCANTYPE`

**Values:**
`AMF_VIDEO_ENCODER_SCANTYPE_ENUM`: `AMF_VIDEO_ENCODER_SCANTYPE_PROGRESSIVE`, `AMF_VIDEO_ENCODER_SCANTYPE_INTERLACED`

**Default Value:**
`AMF_VIDEO_ENCODER_SCANTYPE_PROGRESSIVE`

**Description:**
Selects progressive or interlaced scan.

---

**Name:**
`AMF_VIDEO_ENCODER_QUALITY_PRESET`

**Values:**
`AMF_VIDEO_ENCODER_QUALITY_PRESET_ENUM`: `AMF_VIDEO_ENCODER_QUALITY_PRESET_BALANCED`, `AMF_VIDEO_ENCODER_QUALITY_PRESET_SPEED`, `AMF_VIDEO_ENCODER_QUALITY_PRESET_QUALITY`

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

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

---

**Name:**
`AMF_VIDEO_ENCODER_FULL_RANGE_COLOR`

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

**Default Value:**
`false`

**Description:**
True indicates that the YUV range is `0`...`255`.

---

**Name:**
`AMF_VIDEO_ENCODER_PICTURE_TRANSFER_MODE`

**Values:**
`AMF_VIDEO_ENCODER_PICTURE_TRANSFER_MODE_ENUM`: `AMF_VIDEO_ENCODER_PICTURE_TRANSFER_MODE_ON`, `AMF_VIDEO_ENCODER_PICTURE_TRANSFER_MODE_OFF`

**Default Value:**
`AMF_VIDEO_ENCODER_PICTURE_TRANSFER_MODE_OFF`

**Description:**
The application can turn on this flag for a specific input picture to allow dumping the reconstructed picture and/or injecting a reference picture.

---

**Name:**
`AMF_VIDEO_ENCODER_QUERY_TIMEOUT`

**Values:**
`ENCODER_TIMEOUT`

**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 a `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_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_OUTPUT_MODE`

**Values:**
`AMF_VIDEO_ENCODER_OUTPUT_MODE_ENUM`: `AMF_VIDEO_ENCODER_OUTPUT_MODE_FRAME`,   `AMF_VIDEO_ENCODER_OUTPUT_MODE_TILE`

**Default Value:**
`AMF_VIDEO_ENCODER_OUTPUT_MODE_FRAME`

**Description:**
Defines encoder output mode.

---

**Name:**
`AMF_VIDEO_ENCODER_PSNR_FEEDBACK`

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

**Default Value:**
`false`

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

---

**Name:**
`AMF_VIDEO_ENCODER_SSIM_FEEDBACK`

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

**Default Value:**
`false`

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

---

**Name:**
`AMF_VIDEO_ENCODER_BLOCK_QP_FEEDBACK`

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

**Default Value:**
`false`

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

---

| Name (prefix "AMF_VIDEO_ENCODER_") | Type     |
| :--------------------------------- | :------- |
| MOTION_HALF_PIXEL                  | amf_bool |
| MOTION_QUARTERPIXEL                | amf_bool |


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

---

**Name:**
`AMF_VIDEO_ENCODER_MOTION_HALF_PIXEL`

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

**Default Value:**
`true`

**Description:**
Turns on/off half-pixel motion estimation.

---

**Name:**
`AMF_VIDEO_ENCODER_MOTION_QUARTERPIXEL`

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

**Default Value:**
`false`

**Description:**
Turns on/off quarter-pixel motion estimation.

---

| Name (prefix "AMF_VIDEO_ENCODER_") | Type      |
| :--------------------------------- | :-------- |
| NUM_TEMPORAL_ENHANCMENT_LAYERS     | amf_int64 |


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

---

**Name:**
`AMF_VIDEO_ENCODER_NUM_TEMPORAL_ENHANCMENT_LAYERS`

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

**Default Value:**
`1`

**Description:**
Sets the number of temporal enhancement 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 enhancement layers will be delayed until the start of the next temporal GOP.
   - B-pictures and Intra-refresh features are not supported with SVC.

`NumOfTemporalEnhancmentLayers` shall not exceed `MaxNumOfTemporalLayers`. SVC is supported in all usages on Radeon RX 5000 Series or newer GPUs and Ryzen 2000 U/H series or newer APUs. It is only supported in Webcam usage on products prior to the aforementioned.

---

| Name (prefix "AMF_VIDEO_ENCODER_")     | Type |
| :------------------------------------- | :--- |
| TL<TL_Num>.QL<QL_Num>.<Parameter_name> |      |


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

---

**Name:**
`AMF_VIDEO_ENCODER_TL<TL_Num>.QL<QL_Num>.<Parameter_name>`

**Values:**
Parameter-specific values

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

**Description:**
Configures rate-control parameter per SVC layer.
   - TL_Num — temporal layer number
   - QL_Num — quality layer number
   - Parameter_name — rate-control parameter name (see below)

Rate-control parameters supported
   - TargetBitrate
   - PeakBitrate
   - VBVBufferSize
   - FrameRate
   - MinQP
   - MaxQP
   - QPI
   - QPP
   - FillerDataEnable
   - RateControlSkipFrameEnable
   - EnforceHRD
   - MaxAUSize

(Refer to rate-control parameters section of this table for more details)

Remarks: Quality layers are not supported on VCE 1.0. “QL0” must be used for quality layers.

---

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

| Name (prefix "AMF_VIDEO_ENCODER_") | Type               |
| :--------------------------------- | :----------------- |
| INSERT_SPS                         | amf_bool           |
| INSERT_PPS                         | amf_bool           |
| INSERT_AUD                         | amf_bool           |
| PICTURE_STRUCTURE                  | amf_int64          |
| FORCE_PICTURE_TYPE                 | amf_int64          |
| END_OF_SEQUENCE                    | amf_bool           |
| END_OF_STREAM                      | amf_bool           |
| MARK_CURRENT_WITH_LTR_INDEX        | amf_int64          |
| FORCE_LTR_REFERENCE_BITFIELD       | amf_int64          |
| ROI_DATA                           | AMF_SURFACE_GRAY32 |
| STATISTICS_FEEDBACK                | amf_bool           |
| REFERENCE_PICTURE                  | AMFInterfacePtr    |


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

---

**Name:**
`AMF_VIDEO_ENCODER_INSERT_SPS`

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

**Default Value:**
`false`

**Description:**
Inserts SPS.

---

**Name:**
`AMF_VIDEO_ENCODER_INSERT_PPS`

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

**Default Value:**
`false`

**Description:**
Inserts PPS.

---

**Name:**
`AMF_VIDEO_ENCODER_INSERT_AUD`

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

**Default Value:**
`false`

**Description:**
Inserts AUD.

---

**Name:**
`AMF_VIDEO_ENCODER_PICTURE_STRUCTURE`

**Values:**
`AMF_VIDEO_ENCODER_PICTURE_STRUCTURE_ENUM`:
`AMF_VIDEO_ENCODER_PICTURE_STRUCTURE_NONE`, `AMF_VIDEO_ENCODER_PICTURE_STRUCTURE_FRAME`, `AMF_VIDEO_ENCODER_PICTURE_STRUCTURE_TOP_FIELD`, `AMF_VIDEO_ENCODER_PICTURE_STRUCTURE_BOTTOM_FIELD`

**Default Value:**
`AMF_VIDEO_ENCODER_PICTURE_STRUCTURE_FRAME`

**Description:**
Picture structure.

---

**Name:**
`AMF_VIDEO_ENCODER_FORCE_PICTURE_TYPE`

**Values:**
`AMF_VIDEO_ENCODER_PICTURE_TYPE_ENUM`: `AMF_VIDEO_ENCODER_PICTURE_TYPE_NONE`, `AMF_VIDEO_ENCODER_PICTURE_TYPE_SKIP`, `AMF_VIDEO_ENCODER_PICTURE_TYPE_IDR`, `AMF_VIDEO_ENCODER_PICTURE_TYPE_I`, `AMF_VIDEO_ENCODER_PICTURE_TYPE_P`, `AMF_VIDEO_ENCODER_PICTURE_TYPE_B`

**Default Value:**
`AMF_VIDEO_ENCODER_PICTURE_TYPE_NONE`

**Description:**
Forces the picture type (to use this feature, set `AMF_VIDEO_ENCODER_IDR_PERIOD` to `0`) determined by the picture management with the following precedence `IDR`, `I`, `P` and `B`. Force picture type will only take effect to override type with lower precedence.
`B` feature is not supported by VCE 1.0.

---

**Name:**
`AMF_VIDEO_ENCODER_END_OF_SEQUENCE`

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

**Default Value:**
`false`

**Description:**
End of sequence.

---

**Name:**
`AMF_VIDEO_ENCODER_END_OF_STREAM`

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

**Default Value:**
`false`

**Description:**
End of stream.

---

**Name:**
`AMF_VIDEO_ENCODER_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_FORCE_LTR_REFERENCE_BITFIELD`

**Values:**
Bitfield `MaxOfLTRFrames` (max possible 16 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_ROI_DATA`

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

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

**Description:**
Importance value for each 16x16 macro block ranges from `0` (least important) to `10` (most important), stored in 32bit unsigned format.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTICS_FEEDBACK`

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

**Default Value:**
`false`

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

---

**Name:**
`AMF_VIDEO_ENCODER_REFERENCE_PICTURE`

**Values:**
`AMFSurface`

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

**Description:**
Injected reference picture. Valid with `AMF_VIDEO_ENCODER_PICTURE_TRANSFER_MODE` turned on.

---

| Name (prefix "AMF_VIDEO_ENCODER_")   | Type       |
| :---------------------------------   | :--------- |
| OUTPUT_DATA_TYPE                     | amf_int64  |
| OUTPUT_MARKED_LTR_INDEX              | amf_int64  |
| OUTPUT_REFERENCED_LTR_INDEX_BITFIELD | amf_int64  |
| OUTPUT_TEMPORAL_LAYER                | amf_int64  |
| OUTPUT_BUFFER_TYPE                   | amf_int64  |
| RECONSTRUCTED_PICTURE                | AMFSurface |

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

---

**Name:**
`AMF_VIDEO_ENCODER_OUTPUT_DATA_TYPE`

**Values:**
`AMF_VIDEO_ENCODER_OUTPUT_DATA_TYPE_ENUM`: `AMF_VIDEO_ENCODER_OUTPUT_DATA_TYPE_IDR`, `AMF_VIDEO_ENCODER_OUTPUT_DATA_TYPE_I`, `AMF_VIDEO_ENCODER_OUTPUT_DATA_TYPE_P`, `AMF_VIDEO_ENCODER_OUTPUT_DATA_TYPE_B`

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

**Description:**
Type of encoded data.
`B` feature is not supported by VCE 1.0.

---

**Name:**
`AMF_VIDEO_ENCODER_OUTPUT_MARKED_LTR_INDEX`

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

**Default Value:**
`-1`

**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_OUTPUT_REFERENCED_LTR_INDEX_BITFIELD`

**Values:**
Bitfield `MaxOfLTRFrames` (max possible 16 bits)

**Default Value:**
`0`

**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_OUTPUT_TEMPORAL_LAYER`

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

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

**Description:**
Temporal layer of the encoded picture.

---

**Name:**
`AMF_VIDEO_ENCODER_OUTPUT_BUFFER_TYPE`

**Values:**
`AMF_VIDEO_ENCODER_OUTPUT_BUFFER_TYPE_ENUM`: `AMF_VIDEO_ENCODER_OUTPUT_BUFFER_TYPE_FRAME`,`AMF_VIDEO_ENCODER_OUTPUT_BUFFER_TYPE_TILE`, `AMF_VIDEO_ENCODER_OUTPUT_BUFFER_TYPE_TILE_LAST`

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

**Description:**
Encoder output buffer type.

---

**Name:**
`AMF_VIDEO_ENCODER_RECONSTRUCTED_PICTURE`

**Values:**
`AMFSurface`

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

**Description:**
Reconstructed picture. Valid with `AMF_VIDEO_ENCODER_PICTURE_TRANSFER_MODE` turned on.

---

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

| Name (prefix with AMF_VIDEO_ENCODER_CAP_) | Type      |
| :-------------------------------------------- | :-------- |
|MAX_BITRATE                      |amf_int64|
|NUM_OF_STREAMS                   |amf_int64|
|MAX_PROFILE                      |amf_int64|
|MAX_LEVEL                        |amf_int64|
|BFRAMES                          |amf_bool|
|MIN_REFERENCE_FRAMES             |amf_int64|
|MAX_REFERENCE_FRAMES             |amf_int64|
|MAX_TEMPORAL_LAYERS              |amf_int64|
|FIXED_SLICE_MODE                 |amf_bool|
|NUM_OF_HW_INSTANCES              |amf_int64|
|COLOR_CONVERSION                 |amf_int64|
|PRE_ANALYSIS                     |amf_bool|
|ROI                              |amf_bool|
|MAX_THROUGHPUT                   |amf_int64|
|REQUESTED_THROUGHPUT             |amf_int64|
|QUERY_TIMEOUT_SUPPORT            |amf_bool|
|SUPPORT_SLICE_OUTPUT             |amf_bool|


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

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_MAX_BITRATE`

**Values:**
Integers, >=0

**Description:**
Maximum bit rate in bits.

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_NUM_OF_STREAMS`

**Values:**
Integers, >=0

**Description:**
Maximum number of encode streams supported.

---


**Name:**
`AMF_VIDEO_ENCODER_CAP_MAX_PROFILE`

**Values:**
`AMF_VIDEO_ENCODER_PROFILE_ENUM`: `AMF_VIDEO_ENCODER_PROFILE_BASELINE`, `AMF_VIDEO_ENCODER_PROFILE_MAIN`,`AMF_VIDEO_ENCODER_PROFILE_HIGH`, `AMF_VIDEO_ENCODER_PROFILE_CONSTRAINED_BASELINE`,`AMF_VIDEO_ENCODER_PROFILE_CONSTRAINED_HIGH`


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

---


**Name:**
`AMF_VIDEO_ENCODER_CAP_MAX_LEVEL`

**Values:**
`AMF_VIDEO_ENCODER_H264_LEVEL_ENUM`:
`AMF_LEVEL_1`, `AMF_LEVEL_1_1`, `AMF_LEVEL_1_2`, `AMF_LEVEL_1_3`, `AMF_LEVEL_2`, `AMF_LEVEL_2_1`,`AMF_LEVEL_2_2`, `AMF_LEVEL_3`, `AMF_LEVEL_3_1`,`AMF_LEVEL_3_2`, `AMF_LEVEL_4`, `AMF_LEVEL_4_1`, `AMF_LEVEL_4_2`,`AMF_LEVEL_5`, `AMF_LEVEL_5_1`, `AMF_LEVEL_5_2`, `AMF_LEVEL_6`, `AMF_LEVEL_6_1`, `AMF_LEVEL_6_2`


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

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_BFRAMES`

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


**Description:**
Are B-Frames supported?

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_MIN_REFERENCE_FRAMES`

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

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_MAX_REFERENCE_FRAMES`

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

---

**Name:**
`AMF_VIDEO_ENCODER_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_CAP_FIXED_SLICE_MODE`

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


**Description:**
Is fixed slice mode supported?

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_NUM_OF_HW_INSTANCES`

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

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

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_COLOR_CONVERSION`

**Values:**
`AMF_ACCELERATION_TYPE`


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

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_PRE_ANALYSIS`

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


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

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_ROI`

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


**Description:**
ROI map support is available.

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_MAX_THROUGHPUT`

**Values:**
Integers, >=0

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

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_REQUESTED_THROUGHPUT`

**Values:**
Integers, >=0

**Description:**
Current total requested throughput for encoder in MB (16 x 16 pixels).

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_QUERY_TIMEOUT_SUPPORT`

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


**Description:**
Timeout supported for QueryOutout call.

---

**Name:**
`AMF_VIDEO_ENCODER_CAP_SUPPORT_SLICE_OUTPUT`

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


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

---

### Table A-4. Encoder statistics feedback

| Name (prefix "AMF_VIDEO_ENCODER_")  | Type      |
| :---------------------------------- | :-------- |
| STATISTIC_FRAME_QP                  | amf_int64 |
| STATISTIC_AVERAGE_QP                | amf_int64 |
| STATISTIC_MAX_QP                    | amf_int64 |
| STATISTIC_MIN_QP                    | 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_SATD_FINAL                | amf_int64 |
| STATISTIC_SATD_INTRA                | amf_int64 |
| STATISTIC_SATD_INTER                | amf_int64 |
| STATISTIC_VARIANCE                  | amf_int64 |

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

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_FRAME_QP`

**Description:**
QP of the first encoded macroblocks in a picture.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_AVERAGE_QP`

**Description:**
Average QP of all encoded macroblocks in a picture.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_MAX_QP`

**Description:**
Max QP among all encoded macroblocks in a picture.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_MIN_QP`

**Description:**
Min QP among all encoded macroblocks in a picture.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_PIX_NUM_INTRA`

**Description:**
Number of intra-coded pixels.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_PIX_NUM_INTER`

**Description:**
Number of inter-coded pixels.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_PIX_NUM_SKIP`

**Description:**
Number of skip-coded pixels.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_BITCOUNT_RESIDUAL`

**Description:**
Frame level bit count of residual data.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_BITCOUNT_MOTION`

**Description:**
Frame level bit count of motion vectors.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_BITCOUNT_INTER`

**Description:**
Frame level bit count of inter macroblocks.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_BITCOUNT_INTRA`

**Description:**
Frame level bit count of intra macroblocks.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_BITCOUNT_ALL_MINUS_HEADER`

**Description:**
Frame level bit count of the bitstream excluding header.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_MV_X`

**Description:**
Accumulated absolute values of MVX.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_MV_Y`

**Description:**
Accumulated absolute values of MVY.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_RD_COST_FINAL`

**Description:**
Frame level final RD cost.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_RD_COST_INTRA`

**Description:**
Frame level RD cost for intra mode.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_RD_COST_INTER`

**Description:**
Frame level RD cost for inter mode.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_SATD_FINAL`

**Description:**
Frame level final SATD.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_SATD_INTRA`

**Description:**
Frame level SATD for intra mode.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_SATD_INTER`

**Description:**
Frame level SATD for inter mode.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_VARIANCE`

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

---

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

| Name (prefix "AMF_VIDEO_ENCODER_") | 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 16. Encoder PSNR/SSIM feedback
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_PSNR_Y`

**Description:**
PSNR Y.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_PSNR_U`

**Description:**
PSNY U.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_PSNR_V`

**Description:**
PSNR V.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_PSNR_ALL`

**Description:**
PSNR YUV.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_SSIM_Y`

**Description:**
SSIM Y.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_SSIM_U`

**Description:**
SSIM U.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_SSIM_V`

**Description:**
SSIM V.

---

**Name:**
`AMF_VIDEO_ENCODER_STATISTIC_SSIM_ALL`

**Description:**
SSIM YUV.

---

### Table A-6. Deprecated

| Name (prefix "AMF_VIDEO_ENCODER_") | Type       | Deprecated Starting |
| :--------------------------------- | :--------- | :--------: |
| MAX_INSTANCES                      | amf_int64    | v1.4.21 |
| MULTI_INSTANCE_MODE                | amf_bool     | v1.4.21 |
| CURRENT_QUEUE                      | amf_int64    | v1.4.23 |
| RATE_CONTROL_PREANALYSIS_ENABLE    | amf_int64    | v1.4.21 |
| CAPS_QUERY_TIMEOUT_SUPPORT         | amf_bool     | v1.4.18 |


<p align="center">
Table 17. Deprecated
</p>

---

**Name:**
`AMF_VIDEO_ENCODER_MAX_INSTANCES`

**Values:**
`1`, `2`

**Default Value:**
`1`

**Description:**
Hardware-dependent, only some hardware supports 2 instances.

---

**Name:**
`AMF_VIDEO_ENCODER_MULTI_INSTANCE_MODE`

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

**Default Value:**
`false`

**Description:**
Enables or disables multi-instance mode.

---

**Name:**
`AMF_VIDEO_ENCODER_CURRENT_QUEUE`

**Values:**
`0`, `1`

**Default Value:**
`0`

**Description:**
Selects the encoder instance frames are being submitted to.

---

**Name:**
`AMF_VIDEO_ENCODER_RATE_CONTROL_PREANALYSIS_ENABLE`

**Values:**
`AMF_VIDEO_ENCODER_PREENCODE_DISABLED`, `AMF_VIDEO_ENCODER_PREENCODE_ENABLED`

**Default Value:**
`0`

**Description:**
Enables pre-encode assisted rate control. Deprecated, please use `AMF_VIDEO_ENCODER_PREENCODE_ENABLE` instead.

---

**Name:**
`AMF_VIDEO_ENCODER_CAPS_QUERY_TIMEOUT_SUPPORT`

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

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

**Description:**
Timeout supported for `QueryOutput` call. Deprecated, please use `AMF_VIDEO_ENCODER_CAP_QUERY_TIMEOUT_SUPPORT` instead.

---
