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VCE: Some initial documentation.

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@ -19,23 +19,65 @@ AMD VCE Encoder
Supported Hardware and Configurations Supported Hardware and Configurations
-------------- --------------
- AMD Radeon RX 400 Series or better. - AMD Radeon RX 400 Series, Vega or better
- Windows 10 - Windows 10
Please note, these are not hard limits and the feature *may* work on older series and operating systems, but this is not officially supported. Please note, these are not hard limits and the feature *may* work on older cards and operating systems, but this is not officially supported.
Enabling support Enabling support
-------------- --------------
Support for the VCE encoder can be enabled in preferences under the video tab. If your system is not supported, the option will be greyed out. Support for the VCE encoder can be enabled in preferences under the video tab. If your system is not supported, the option will be greyed out.
Encoding Presets Performance
--------------
Take note that only the encode portion of the encode pipeline is done on the AMD hardware.
Every stage prior and after in the pipeline including (decoding, filters, a/v sync, muxing etc.) all happen on the CPU. As a result, it is normal to have high, or 100% CPU utilisation during encodes.
It is common, particularly on lower end hardware that the CPU may be a bottleneck for the encoder. To minimise this effect, turn off any filters that you do not require.
Using the Advanced Options
--------------
VCE does have a limited set of advanced encoder options that can be used. Generally speaking is is not recommended to change these parameters. The built-in presets offer a good range of options.
From the command line, you can use the --encopts parameter as follows:
--encopts="option1=value1:option2=value2"
From the graphical user interface, just set the options in the dedicated options text box on the Video tab.
option1=value1:option2=value2
Option Types
--------------
The following value types are supported (each option only accepts one value type):
- integer
A number that can be written without a fractional or decimal component.
- boolean
0 means off (or disabled).
1 means on (or enabled).
- string
Takes a setting defined as s string. See comment for details.
Available Options
-------------- --------------
| Presets | | Option | Type | H.264 | H.265 | Comment |
|------------------| |------------------|-------------|------------------------------------------------------------------------------------------------|
| Quality | | preanalysis | boolean | X | X | |
| Balanced | | vbaq | boolean | X | X | |
| Speed | | enforce_hrd | boolean | X | X | |
| max_au_size | int | X | X | |
| me_half_pel | boolean | X | X | |
| me_quarter_pel | boolean | X | X | |
| coder | string | | X | Options: auto, cabac, cavlc |
| bf_delta_qp | boolean | | X | B-Picture Delta QP |
| bf_ref | boolean | | X | Enable Reference to B-Frames |
| bf_ref_delta_qp | boolean | | X | Reference B-Picture Delta QP |
| intra_refresh_mb | int | | X | |