[Cin] Hwaccel FFV1 decoding and encoding

[Andrew Randrianasulu]

вс, 25 мая 2025 г., 23:16 Terje J. Hanssen via Cin <
cin at lists.cinelerra-gg.org>:

> According to Phoronix 22 May 2025 :
>
>    - FFmpeg FFV1 Vulkan Encoder Lands +35% Improvement For AMD, +50% For
>    NVIDIA
>    - No word on Intel performance benefits from this Vulkan encode
>    optimization.
>
>
> AFAIK Intel has not yet QSV support for FFV1 either.
>
> Any idea which ffmpeg version release ffv1_vulkan will be available ?
>

I guess "upcoming", I saw references to 8.0 in commits.


And which color bit depths will be supported: 8-bit yuv422p and 10-bit
> yuv422p10le/ y210 ?
> Speed tests?
>

Speed was not great for my rx550 (few fps for 4k video), but may be Arc
actually faster for such workloads?

I see at least those mentioned
in ../thirdparty/ffmpeg.git/libavcodec/ffv1enc_vulkan.c

    if (avctx->sw_pix_fmt == AV_PIX_FMT_GBRP10 ||
                                avctx->sw_pix_fmt == AV_PIX_FMT_GBRP12 ||
        avctx->sw_pix_fmt == AV_PIX_FMT_GBRP14)

so high-bit depth RGB is supported.

I'll try to synthetize Vulkan ffv1 encoder preset and see what it offers.


>
> Terje J. H
>
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