[FFmpeg-devel] [PATCH 1/2] avfilter/vf_lut3d: increase MAX_LEVEL

[Paul B Mahol]

On 4/27/19, Clément Bœsch <u at pkh.me> wrote:
> On Sat, Apr 27, 2019 at 12:29:44PM +0200, Paul B Mahol wrote:
>> On 4/27/19, Clément Bœsch <u at pkh.me> wrote:
>> > On Thu, Apr 25, 2019 at 04:47:00PM +0200, Paul B Mahol wrote:
>> >> On 4/25/19, Reto Kromer <lists at reto.ch> wrote:
>> >> > Paul B Mahol wrote:
>> >> >
>> >> >>Found 65x65x65 3D LUT in wild
>> >> >
>> >> > FYI: 128x128x128 3D LUTs do also exist in film production.
>> >> >
>> >>
>> >> Thank you, changed locally.
>> >
>> > This means one single malloc of 24M unless I'm mistaken. Are we sure
>> > that's what we want?
>>
>> So you want this to be dynamically allocated? How you want to access
>> elements?
>
> It is actually already dynamically allocated (the private context is), but
> I suppose you meant individual allocs for each dimension. It really is an
> open question. Maybe it's not an issue, it's just that I would just think
> twice before doing such change because I would assume it would impact
> performance on low-end machines due to more sparse memory accesses.
>

Considering that some filtergraphs needs 64GB of RAM I consider that non-issue.