videoio: test for V4L using virtual device#23944
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Tested manually with Ubuntu 18.04.
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Add V4L2_PIX_FMT_Y16_BE pixel format #18498 Address #18495 relates to #23944 ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or other license that is incompatible with OpenCV - [ ] The PR is proposed to proper branch - [x] There is reference to original bug report and related work - [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [ ] The feature is well documented and sample code can be built with the project CMake - [ ] Test using Melexis MLX90640
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Add V4L2_PIX_FMT_Y16_BE pixel format opencv#18498 Address opencv#18495 relates to opencv#23944 ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or other license that is incompatible with OpenCV - [ ] The PR is proposed to proper branch - [x] There is reference to original bug report and related work - [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [ ] The feature is well documented and sample code can be built with the project CMake - [ ] Test using Melexis MLX90640
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Add V4L2_PIX_FMT_Y16_BE pixel format opencv#18498 Address opencv#18495 relates to opencv#23944 ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or other license that is incompatible with OpenCV - [ ] The PR is proposed to proper branch - [x] There is reference to original bug report and related work - [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [ ] The feature is well documented and sample code can be built with the project CMake - [ ] Test using Melexis MLX90640
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This PR will support future improvement in #18498
Instruction (from cap_v4l.cpp comment):
Reference: https://www.kernel.org/doc/html/v4.8/media/v4l-drivers/vivid.html
Notes: