[FFmpeg-devel] [PATCH 1/2] avfilter/vf_zscale: add slice threading

[Lynne]

May 31, 2019, 2:33 PM by onemda at gmail.com:

> On 5/31/19, Lynne <dev at lynne.ee> wrote:
>
>>
>>
>>
>> May 31, 2019, 2:16 PM by onemda at gmail.com:
>>
>>> On 5/31/19, Lynne <dev at lynne.ee> wrote:
>>>
>>>> May 31, 2019, 11:45 AM by onemda at gmail.com <mailto:onemda at gmail.com>:
>>>>
>>>>> Signed-off-by: Paul B Mahol <> onemda at gmail.com
>>>>> <mailto:onemda at gmail.com>>
>>>>> >
>>>>> ---
>>>>> libavfilter/vf_zscale.c | 335 +++++++++++++++++++++++++---------------
>>>>> 1 file changed, 214 insertions(+), 121 deletions(-)
>>>>>
>>>>
>>>> This will create discontinuities between each slice.
>>>>
>>>
>>> Have you actually tried it?
>>>
>>> I had and its just fine.
>>>
>>
>> Bitexact results with non-nearest scaling? Should be even worse with
>> anything better than bilinear.
>>
>
> Results are always bitexact. It just not bitexact with single
> threading and differences are irrelevant.
>

Number of threads should not have any impact at all on quality ever.