[FFmpeg-devel] [PATCH] libavfilter: zscale performance optimization >4x

[Paul B Mahol]

On Tue, Feb 22, 2022 at 6:25 AM Lynne <dev at lynne.ee> wrote:

> 19 Feb 2022, 14:58 by niva213 at gmail.com:
>
> > By ffmpeg threading support implementation via frame slicing and doing
> > zimg_filter_graph_build that used to take 30-60% of each frame processig
> > only if necessary (some parameters changed)
> > the performance increase vs original version
> > in video downscale and color conversion  >4x is seen
> > on 64 cores Intel Xeon, 3x on i7-6700K (4 cores with HT)
> >
> > Signed-off-by: Victoria Zhislina <Victoria.Zhislina at intel.com>
> >
>
> Can't you patch such a feature into the upstream instead?
>

zscale already have own threading ability, but is very hard to use it, last
time i tried.


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