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

[Paul B Mahol]

On Tue, Feb 22, 2022 at 9:15 AM Paul B Mahol <onemda at gmail.com> wrote:

>
>
> 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.
>

I mean zimg.


>
>
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>