rainy liu

Support local build, support ffmpeg for windows, linux, macos, android

4

- local build, download opencv sdk from opencv.full - support ffmpeg for windows, linux, android, macos (ios can't embed dylib, which will conflict with LGPL 2.0 license) - add DartCvMacOS...

- #257 > Maybe we can implement these methods in the future: https://docs.opencv.org/4.10.0/d7/dfc/group__highgui.html#gaf78d2155d30b728fc413803745b67a9b

Split `videoio` module to independent package and support FFMPEG for all platforms

2

Personally, I think supporting FFMPEG for all platforms is necessary, since there are many issues about `VideoWriter` and `VideoCapture`. ### Several principles: - uniform FFMPEG version (FFMPEG 6.1 is selected...

`CvStatus *SVD_Compute(Mat src, Mat *w, Mat *u, Mat *vt, int flags)` `CvStatus *SVD_Compute(Mat src, Mat w, Mat u, Mat vt, int flags)`

**Is your feature request related to a problem? Please describe.** Flutter 3.38 with dart 3.10 now support hooks (previously called native-assets), we can publish 2.x stable version now. **Additional context**...