opencv 4.12.0

[dnhn]

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

---

[chenrui333]

  ==> python3.13 -c 'import cv2; print(cv2.__version__)'
  WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
  E0000 00:00:1751491685.971058   53137 descriptor_database.cc:550] Invalid file descriptor data passed to EncodedDescriptorDatabase::Add().
  F0000 00:00:1751491685.971093   53137 descriptor.cc:2248] Check failed: GeneratedDatabase()->Add(encoded_file_descriptor, size) 
  *** Check failure stack trace: ***
  Aborted (core dumped)

[daeho-ro]

I believe the error is related to abseil or protobuf, but they are really hard to bump

[deadprogram]

Perhaps on the Linux build use -DBUILD_PROTOBUF=ON instead of the system protobuf?

I'm very eager to get the new OpenCV formula for macOS, please and thank you. 😸