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91 lines
4.6 KiB
Markdown
91 lines
4.6 KiB
Markdown
---
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Type: article
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Title: AMD VCE
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Project: HandBrake
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Project_URL: https://handbrake.fr/
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Project_Version: Latest
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Language: English
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Language_Code: en
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Authors: [ Bradley Sepos <bradley@bradleysepos.com> (BradleyS), Scott (s55) ]
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Copyright: 2021 HandBrake Team
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License: Creative Commons Attribution-ShareAlike 4.0 International
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License_Abbr: CC BY-SA 4.0
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License_URL: https://handbrake.fr/docs/license.html
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---
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AMD VCE
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=======
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## Supported Hardware and Configurations
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- AMD Radeon RX 400, 500, Vega/II, Navi series GPU or better
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- Ubuntu Linux 20.04 or later
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- Windows 10
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Please note, these are not hard limits. Hardware encoding via VCE *might* work on older series GPUs and older operating systems, but this is not officially supported.
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On Ubuntu Linux, [AMD Radeon Software for Linux version 19.20 or later](https://www.amd.com/en/support/kb/release-notes/rn-amdgpu-unified-linux) is required to use the VCE encoder. Install using the `amdgpu-pro-install` script according to AMD’s [installation guide](https://amdgpu-install.readthedocs.io/en/latest/). Additionally, you must manually install the `amf-amdgpu-pro` package included in the download.
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## Enabling support
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Support for the AMD VCE encoder is enabled in preferences on the video tab. If your system is not supported, the option will be disabled.
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## Performance
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HandBrake supports the AMD VCE encoder but does not support the VCN decoder.
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The CPU will still be used for:
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- Video decoding
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- All video filters
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- Audio encoding
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- HandBrake's engine, A/V sync etc
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- Subtitles
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- Muxing
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These operations all happen in parallel as the job progresses. As such, it is normal to see high (or even 100%) CPU utilisation even when using QuickSync.
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It is also common, particularly on lower-end or older hardware, for the CPU to be a bottleneck which will cause lower than expected performance. To minimize this effect, disable any filters that you do not require.
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## Advanced options
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The AMD VCE hardware encoder has a limited set of advanced encoder options. Generally speaking, it is not recommended to change these parameters, as the built-in presets offer a good range of options for common uses.
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From HandBrake’s command line interface, use the `--encopts` parameter as follows:
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--encopts="option1=value1:option2=value2"
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From HandBrake’s graphical interface, set the options in the `Advanced Options` field on the `Video` tab:
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option1=value1:option2=value2
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### Option value types
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The following value types are supported (each option only accepts one value type):
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- integer
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A number that can be written without a fractional or decimal component.
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- boolean
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0 means off (or disabled).
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1 means on (or enabled).
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- string
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An alphanumeric string of characters. See the option’s comments for acceptable values.
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### Options list
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| Option | Type | H.264 | H.265 | Detail |
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|------------------|-------------|:-----:|:-----:|--------------------------------------------------------------------------------------|
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| coder | string | ✓ | | Coder selection. Values: `auto` (default), `cabac`, `cavlc`. |
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| preanalysis | boolean | ✓ | ✓ | Set to `1` to enable preliminary analysis, `0` to disable (default). |
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| vbaq | boolean | ✓ | ✓ | Set to `1` to enable Variance Based Adaptive Quantization, `0` to disable (default). |
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| enforce_hrd | boolean | ✓ | ✓ | Set to `1` to enforce Hypothetical Reference Decoder, `0` to disable (default). |
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| max_au_size | int | ✓ | ✓ | Maximum Access Unit size for rate control, in bits. Default: `0` (automatic). |
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| me_half_pel | boolean | ✓ | ✓ | Set to `1` to enable half-pixel motion estimation (default), `0` to disable. |
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| me_quarter_pel | boolean | ✓ | ✓ | Set to `1` to enable quarter-pixel motion estimation (default), `0` to disable. |
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| bf_delta_qp | int | ✓ | | B-Picture Delta QP. The values scale is `-10`–`10`. Default: `4`. |
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| bf_ref | boolean | ✓ | | Set to `1` to enable Reference B-Frames (default), `0` to disable. |
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| bf_ref_delta_qp | int | ✓ | | Reference B-Picture Delta QP. The values scale is `-10`–`10`. Default: `4`. |
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| intra_refresh_mb | int | ✓ | | Number of Intra-Refresh Macroblocks per slot. Default: `0` (automatic). |
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