On date Friday 2024-01-05 10:33:51 +0800, Xiang, Haihao wrote:
> From: Haihao Xiang <[email protected]>
>
> Signed-off-by: Haihao Xiang <[email protected]>
> ---
> doc/ffmpeg.texi | 26 ++++++++++++++++++++++++--
> 1 file changed, 24 insertions(+), 2 deletions(-)
>
> diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
> index 7246a46d2f..f095f402bd 100644
> --- a/doc/ffmpeg.texi
> +++ b/doc/ffmpeg.texi
> @@ -1406,16 +1406,38 @@ If not specified, @samp{auto_any} is used.
> platform-appropriate subdevice (@samp{dxva2} or @samp{d3d11va} or
> @samp{vaapi}) and then deriving a
> QSV device from that.)
>
> -Alternatively, @samp{child_device_type} helps to choose platform-appropriate
> subdevice type.
> -On Windows @samp{d3d11va} is used as default subdevice type.
> +The following options are recognized:
> +@table @option
> +@item child_device
> +Specify a DRM render node on Linux or DirectX adapter on Windows
missing dot at the end of complete sentence, here and below
> +@item child_device_type
> +Choose platform-appropriate subdevice type. On Windows @samp{d3d11va} is used
> +as default subdevice type.
Is this needed for non-Windows platforms?
> +@end table
>
> Examples:
> @table @emph
> +@item -init_hw_device qsv:hw,child_device=/dev/dri/renderD129
> +Create a QSV device with @samp{MFX_IMPL_HARDWARE} on DRM render node
> /dev/dri/renderD129
You can quote the device with @file{/dev/dri/renderD129}.
> +
> +@item -init_hw_device qsv:hw,child_device=1
> +Create a QSV device with @samp{MFX_IMPL_HARDWARE} on DirectX adapter 1. The
> subdevice
> +type is @samp{d3d11va} if @code{--enable-libvpl} is specified at
> configuration time, the
> +subdevice type is @samp{dxva2} if @code{--enable-libmfx} is specified at
> configuration time.
> +
> @item -init_hw_device qsv:hw,child_device_type=d3d11va
> Choose the GPU subdevice with type @samp{d3d11va} and create QSV device with
> @samp{MFX_IMPL_HARDWARE}.
>
> @item -init_hw_device qsv:hw,child_device_type=dxva2
> Choose the GPU subdevice with type @samp{dxva2} and create QSV device with
> @samp{MFX_IMPL_HARDWARE}.
> +
> +@item -init_hw_device qsv:hw,child_device=1,child_device_type=d3d11va
> +Create a QSV device with @samp{MFX_IMPL_HARDWARE} on DirectX adapter 1 with
> subdevice type @samp{d3d11va}
> +
> +@item -init_hw_device vaapi=va:/dev/dri/renderD129 -init_hw_device qsv=hw1@va
> +Create a VAAPI device called @samp{va} on /dev/dri/renderD129, then derive a
> QSV device called @samp{hw1}
> +from device @samp{va}
Looks good otherwise.
BTW, do you know why all hwaccels are not documented in a dedicated
file (hwaccels.texi or something)?
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