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

[Victoria Zhislina]

Awesome, thanks!

On Thu, Mar 10, 2022 at 9:45 PM Paul B Mahol <onemda at gmail.com> wrote:

>
>
> On Thu, Mar 10, 2022 at 7:41 PM Victoria Zhislina <niva213 at gmail.com>
> wrote:
>
>> Paul and all, do you have any chances to view my patch from Feb,19? I
>> assume I'\ve fixed all you've kindly pointed out and even more. Please
>> correct me if I'm wrong. The only question remaining is - are you ok
>> with the combination of threading and conditional filter operation (= do
>> something if it is really required only) or you prefer to split it to 2
>> separate corresponding patches. I'd prefer the first option because it
>> makes git ffmpeg repo and ffmpeg development cleaner not dirtier...
>>
>
> Patch was already applied and some found issues fixed.
>
>
>>
>> On Tue, Feb 22, 2022 at 11:15 AM Paul B Mahol <onemda at gmail.com> wrote:
>>
>>> 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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>>