OpenCV 4.12 / VCPKG Update

[Gilles Caulier]

Hi,

Le dim. 15 févr. 2026 à 01:23, bryan at gillson.net <bryan at gillson.net> a
écrit :

> Hi Gilles, a few months ago we discussed your plans to update OpenCV to
> version 4.12, which was dependent on an update to VCPKG. VCPKG now supports
> OpenCV 4.12 (as of the 12-Dec-2025 release, here:
> https://github.com/microsoft/vcpkg/releases/tag/2025.12.12).
>
>
Yes, I follow the VCPKG reports and MR about openCV.


> As we're approaching the expected March release date for 9.0.0, I wondered
> if this is still in scope?
>

Not sure. See below.


>
> I've been monitoring the NEWS page (
> https://invent.kde.org/graphics/digikam/-/raw/master/NEWS?ref_type=heads)
> and see that Windows remains the only version on OpenCV 4.11. I understand
> this is a big job, so given the approaching 9.0.0 release date I thought
> I'd check in.
>
>
Updating openCV in VCPKG VM requires a large rebuild which implies a lot of
dependencies to be recompiled and it does not work yet. So I let the VM in
preview state with the older OpenCV version.

But to come back to the original problem if i remember : the opencl
detection by opencv under windows with NVIdia GPU, please look the work
around discovered by users in this report :

https://bugs.kde.org/show_bug.cgi?id=511487#c8

Please comment in this bug report if this solution works for you.
Thanks in advance

Best regards

Gilles Caulier



> On  27 Oct 2025 at 09:00:37 Gilles Caulier wrote:
> > I plan to do a huge update of the VM for the next 8.9.0 in the next
> > few weeks. This is a very long task to compile all components, usually
> > between 1 and 2 days. When it's done, the packaging can be easily
> > processed in 30 mins and updated quickly.
> >
> > Please be patient, you will be able to test with a new Windows
> > pre-release 8.9.0 asap.
>
> Thanks,
> Bryan
>
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