opencv通过mingw编译出现的问题
opencv
OpenCV: 开源计算机视觉库
项目地址：https://gitcode.com/gh_mirrors/opencv31/opencv
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参考：https://www.jianshu.com/p/c3411fe5b19c
使用mingw对opencv时，报错如下：
error: 'mutex' in namespace 'std' does not name a type
error: 'thread' in namespace 'std' does not name a type
error: 'condition_variable' in namespace 'std' does not name a type大致意思就是说，在 win 下，mingw64 需要用 posix 接口的 thread 库。
最后我才用x86_64-8.1.0-release-posix-sjlj-rt_v6-rev0 的包解决问题。
网址：https://sourceforge.net/projects/mingw-w64/files/
下载第一个。
解决问题。
具体安装见：https://blog.csdn.net/weixin_50988214/article/details/115098634
GitHub 加速计划 / opencv31 / opencv
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OpenCV: 开源计算机视觉库
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doc: update image codec configuration reference (add AVIF, fix JPEG XL) #28393
This PR updates the build configuration documentation to:
- Add AVIF to the supported format list (it was missing).
- Clarify that some codecs (AVIF, JPEG XL) do not support BUILD_* options because OpenCV does not bundle their source code.
- Update the description to include "write" capabilities for these formats.
### 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 another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [ ] There is a reference to the 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.
- [x] The feature is well documented and sample code can be built with the project CMake
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