Alexander Smorkalov

@lawo123 Could you share full cmake command line and CMake status report? Also, we need reproducer code or at least the function that cases the sigill exception. T-Head system supports...

Duplicate https://github.com/opencv/opencv/issues/14534

@ZhaoChuyang Could you add simple python test to prove that solution works.

Also please pay attention on CI status. Build is broken: ``` In file included from /build/precommit_linux64/4.x/opencv/modules/python/src2/cv2.cpp:17:0: /build/precommit_linux64/4.x/opencv/modules/python/src2/cv2_convert.hpp: In function 'bool pyopencv_to(PyObject*, cv::Matx&, const ArgInfo&)': /build/precommit_linux64/4.x/opencv/modules/python/src2/cv2_convert.hpp:68:5: error: expected ';' before 'cv'...

@Erotemic The warpAffine function like all other image transform functions are designed for up to 4 channels. All transform functions have several branches for different platforms (vectorization for x86, ARM,...

@tomoaki0705 Do you have progress with OpenCV independent reproducer? We discussed the PR on the team meeting and propose to change the behavior for ARM platform only to not introduce...

Yes, I discussed the issue with Alalek and Vpisarev. The proposal is to add `#ifdef __arm__` if you really need it. We do not want to pessimize others.

@tomoaki0705 Do you plan to work on the patch or I may to close it?

Related changes for cudacodec: https://github.com/opencv/opencv_contrib/pull/3340

@komakai Thanks a lot for the contribution! `CAPTURE_POLL_INTERVAL_MS` 10ms is to large IMHO. 33ms is whole frame time for 30fps camera. It makes sense to reduce the delay to 3-5ms....