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feat(linux/vaapi): VAAPI encoder improvements (#5388)

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Conn O'Griofa
2026-07-15 15:41:22 +01:00
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docs/configuration.md
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@@ -3006,6 +3006,125 @@ editing the `conf` file in a text editor. Use the examples as reference.
## VA-API Encoder
### vaapi_blbrc
<table>
<tr>
<td>Description</td>
<td colspan="2">
Block level based bitrate control (BLBRC) can assign different bitrate on a per-block basis. May improve quality on supported devices.
@note{This option only applies when using the VA-API [encoder](#encoder).}
</td>
</tr>
<tr>
<td>Default</td>
<td colspan="2">@code{}
disabled
@endcode</td>
</tr>
<tr>
<td>Example</td>
<td colspan="2">@code{}
vaapi_blbrc = enabled
@endcode</td>
</tr>
</table>
### vaapi_quality
<table>
<tr>
<td>Description</td>
<td colspan="2">
The quality profile controls the tradeoff between speed and quality of encoding.
@note{This option only applies when using the VA-API [encoder](#encoder).}
</td>
</tr>
<tr>
<td>Default</td>
<td colspan="2">@code{}
auto
@endcode</td>
</tr>
<tr>
<td>Example</td>
<td colspan="2">@code{}
vaapi_quality = auto
@endcode</td>
</tr>
<tr>
<td rowspan="4">Choices</td>
<td>auto</td>
<td>driver default quality</td>
</tr>
<tr>
<td>speed</td>
<td>prefer speed</td>
</tr>
<tr>
<td>balanced</td>
<td>balanced</td>
</tr>
<tr>
<td>quality</td>
<td>prefer quality</td>
</tr>
</table>
### vaapi_rc
<table>
<tr>
<td>Description</td>
<td colspan="2">
The encoder rate control.
@note{This option only applies when using the VA-API [encoder](#encoder).}
@warning{The automatic setting may override the driver-default rate control method to VBR and force [vaapi_strict_rc_buffer](#vaapi_strict_rc_buffer) enabled on certain configurations. Selecting another rate control manually will override this behaviour.}
</td>
</tr>
<tr>
<td>Default</td>
<td colspan="2">@code{}
auto
@endcode</td>
</tr>
<tr>
<td>Example</td>
<td colspan="2">@code{}
vaapi_rc = vbr
@endcode</td>
</tr>
<tr>
<td rowspan="7">Choices</td>
<td>auto</td>
<td>driver default (or whitelisted override)</td>
</tr>
<tr>
<td>avbr</td>
<td>average variable bitrate</td>
</tr>
<tr>
<td>cbr</td>
<td>constant bitrate</td>
</tr>
<tr>
<td>cqp</td>
<td>constant qp mode</td>
</tr>
<tr>
<td>icq</td>
<td>intelligent qp mode</td>
</tr>
<tr>
<td>qvbr</td>
<td>quality-defined variable bitrate</td>
</tr>
<tr>
<td>vbr</td>
<td>variable bitrate</td>
</tr>
</table>
### vaapi_strict_rc_buffer
<table>
@@ -3014,7 +3133,7 @@ editing the `conf` file in a text editor. Use the examples as reference.
<td colspan="2">
Enabling this option can avoid dropped frames over the network during scene changes, but video quality may
be reduced during motion.
@note{This option only applies for H.264 and HEVC when using VA-API [encoder](#encoder) on AMD GPUs.}
@note{This option only applies for H.264 and HEVC when using VA-API [encoder](#encoder) on AMD GPUs (or when overriding the default rate control on other devices).}
</td>
</tr>
<tr>