dcaf923517
Conflicts: 3rdparty/ffmpeg/ffmpeg_version.cmake cmake/OpenCVFindLibsGrfmt.cmake cmake/templates/cvconfig.h.cmake modules/bioinspired/doc/retina/index.rst modules/calib3d/doc/camera_calibration_and_3d_reconstruction.rst modules/calib3d/src/precomp.hpp modules/contrib/src/inputoutput.cpp modules/contrib/src/precomp.hpp modules/core/include/opencv2/core/internal.hpp modules/core/include/opencv2/core/types_c.h modules/core/src/drawing.cpp modules/core/src/precomp.hpp modules/core/src/system.cpp modules/features2d/doc/common_interfaces_of_descriptor_matchers.rst modules/features2d/doc/common_interfaces_of_feature_detectors.rst modules/features2d/include/opencv2/features2d/features2d.hpp modules/features2d/src/precomp.hpp modules/flann/src/precomp.hpp modules/gpu/doc/camera_calibration_and_3d_reconstruction.rst modules/gpu/doc/image_filtering.rst modules/gpu/doc/image_processing.rst modules/gpu/doc/video.rst modules/gpu/perf/perf_imgproc.cpp modules/gpu/perf4au/main.cpp modules/gpu/src/imgproc.cpp modules/gpu/src/precomp.hpp modules/gpu/test/test_imgproc.cpp modules/highgui/CMakeLists.txt modules/highgui/test/test_precomp.hpp modules/imgproc/doc/structural_analysis_and_shape_descriptors.rst modules/imgproc/src/precomp.hpp modules/java/generator/src/cpp/Mat.cpp modules/legacy/src/precomp.hpp modules/ml/doc/k_nearest_neighbors.rst modules/ml/src/precomp.hpp modules/nonfree/doc/feature_detection.rst modules/nonfree/src/precomp.hpp modules/objdetect/include/opencv2/objdetect/objdetect.hpp modules/objdetect/src/cascadedetect.cpp modules/objdetect/src/hog.cpp modules/objdetect/src/precomp.hpp modules/objdetect/test/test_latentsvmdetector.cpp modules/ocl/src/hog.cpp modules/ocl/src/opencl/objdetect_hog.cl modules/ocl/src/precomp.hpp modules/photo/src/precomp.hpp modules/stitching/src/precomp.hpp modules/superres/perf/perf_precomp.hpp modules/superres/src/optical_flow.cpp modules/superres/src/precomp.hpp modules/superres/test/test_precomp.hpp modules/ts/include/opencv2/ts.hpp modules/video/src/precomp.hpp modules/videostab/src/precomp.hpp modules/world/src/precomp.hpp
The build script is to be fixed.
Right now it assumes that 32-bit MinGW is in the system path and
64-bit mingw is installed to c:\Apps\MinGW64.
It is important that gcc is used, not g++!
Otherwise the produced DLL will likely be dependent on libgcc_s_dw2-1.dll or similar DLL.
While we want to make the DLLs with minimum dependencies: Win32 libraries + msvcrt.dll.
ffopencv.c is really a C++ source, hence -x c++ is used.
How to update opencv_ffmpeg.dll and opencv_ffmpeg_64.dll when a new version of FFMPEG is release?
1. Install 32-bit MinGW + MSYS from
http://sourceforge.net/projects/mingw/files/Automated%20MinGW%20Installer/mingw-get-inst/
Let's assume, it's installed in C:\MSYS32.
2. Install 64-bit MinGW. http://mingw-w64.sourceforge.net/
Let's assume, it's installed in C:\MSYS64
3. Copy C:\MSYS32\msys to C:\MSYS64\msys. Edit C:\MSYS64\msys\etc\fstab, change C:\MSYS32 to C:\MSYS64.
4. Now you have working MSYS32 and MSYS64 environments.
Launch, one by one, C:\MSYS32\msys\msys.bat and C:\MSYS64\msys\msys.bat to create your home directories.
4. Download ffmpeg-x.y.z.tar.gz (where x.y.z denotes the actual ffmpeg version).
Copy it to C:\MSYS{32|64}\msys\home\<loginname> directory.
5. To build 32-bit ffmpeg libraries, run C:\MSYS32\msys\msys.bat and type the following commands:
5.1. tar -xzf ffmpeg-x.y.z.tar.gz
5.2. mkdir build
5.3. cd build
5.4. ../ffmpeg-x.y.z/configure --enable-w32threads
5.5. make
5.6. make install
5.7. cd /local/lib
5.8. strip -g *.a
6. Then repeat the same for 64-bit case. The output libs: libavcodec.a etc. need to be renamed to libavcodec64.a etc.
7. Then, copy all those libs to <opencv>\3rdparty\lib\, copy the headers to <opencv>\3rdparty\include\ffmpeg_.
8. Then, go to <opencv>\3rdparty\ffmpeg, edit make.bat
(change paths to the actual paths to your msys32 and msys64 distributions) and then run make.bat