after running cmake on the source folder, then I ran mingw32-make on the build folder and this was the error output. Please I need a solutuion.
Building CXX object modules/video/CMakeFiles/opencv_video.dir/src/dis_flow.cpp.obj
C:\opencv\sources\modules\video\src\dis_flow.cpp:54:1: error: expected class-name before '{' token
{
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:136:16: error: 'VariationalRefinement' was not declared in this scope
vector<Ptr<VariationalRefinement> > variational_refinement_processors;
^~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:136:16: note: suggested alternative: 'setVariationalRefinementGamma'
vector<Ptr<VariationalRefinement> > variational_refinement_processors;
^~~~~~~~~~~~~~~~~~~~~
setVariationalRefinementGamma
C:\opencv\sources\modules\video\src\dis_flow.cpp:136:37: error: template argument 1 is invalid
vector<Ptr<VariationalRefinement> > variational_refinement_processors;
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:136:39: error: template argument 1 is invalid
vector<Ptr<VariationalRefinement> > variational_refinement_processors;
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:136:39: error: template argument 2 is invalid
C:\opencv\sources\modules\video\src\dis_flow.cpp:58:10: error: 'void cv::DISOpticalFlowImpl::calc(cv::InputArray, cv::InputArray, cv::InputOutputArray)' marked 'override', but does not override
void calc(InputArray I0, InputArray I1, InputOutputArray flow) CV_OVERRIDE;
^~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:59:10: error: 'void cv::DISOpticalFlowImpl::collectGarbage()' marked 'override', but does not override
void collectGarbage() CV_OVERRIDE;
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:79:9: error: 'int cv::DISOpticalFlowImpl::getFinestScale() const' marked 'override', but does not override
int getFinestScale() const CV_OVERRIDE { return finest_scale; }
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:80:10: error: 'void cv::DISOpticalFlowImpl::setFinestScale(int)' marked 'override', but does not override
void setFinestScale(int val) CV_OVERRIDE { finest_scale = val; }
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:81:9: error: 'int cv::DISOpticalFlowImpl::getPatchSize() const' marked 'override', but does not override
int getPatchSize() const CV_OVERRIDE { return patch_size; }
^~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:82:10: error: 'void cv::DISOpticalFlowImpl::setPatchSize(int)' marked 'override', but does not override
void setPatchSize(int val) CV_OVERRIDE { patch_size = val; }
^~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:83:9: error: 'int cv::DISOpticalFlowImpl::getPatchStride() const' marked 'override', but does not override
int getPatchStride() const CV_OVERRIDE { return patch_stride; }
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:84:10: error: 'void cv::DISOpticalFlowImpl::setPatchStride(int)' marked 'override', but does not override
void setPatchStride(int val) CV_OVERRIDE { patch_stride = val; }
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:85:9: error: 'int cv::DISOpticalFlowImpl::getGradientDescentIterations() const' marked 'override', but does not override
int getGradientDescentIterations() const CV_OVERRIDE { return grad_descent_iter; }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:86:10: error: 'void cv::DISOpticalFlowImpl::setGradientDescentIterations(int)' marked 'override', but does not override
void setGradientDescentIterations(int val) CV_OVERRIDE { grad_descent_iter = val; }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:87:9: error: 'int cv::DISOpticalFlowImpl::getVariationalRefinementIterations() const' marked 'override', but does not override
int getVariationalRefinementIterations() const CV_OVERRIDE { return variational_refinement_iter; }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:88:10: error: 'void cv::DISOpticalFlowImpl::setVariationalRefinementIterations(int)' marked 'override', but does not override
void setVariationalRefinementIterations(int val) CV_OVERRIDE { variational_refinement_iter = val; }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:89:11: error: 'float cv::DISOpticalFlowImpl::getVariationalRefinementAlpha() const' marked 'override', but does not override
float getVariationalRefinementAlpha() const CV_OVERRIDE { return variational_refinement_alpha; }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:90:10: error: 'void cv::DISOpticalFlowImpl::setVariationalRefinementAlpha(float)' marked 'override', but does not override
void setVariationalRefinementAlpha(float val) CV_OVERRIDE { variational_refinement_alpha = val; }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:91:11: error: 'float cv::DISOpticalFlowImpl::getVariationalRefinementDelta() const' marked 'override', but does not override
float getVariationalRefinementDelta() const CV_OVERRIDE { return variational_refinement_delta; }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:92:10: error: 'void cv::DISOpticalFlowImpl::setVariationalRefinementDelta(float)' marked 'override', but does not override
void setVariationalRefinementDelta(float val) CV_OVERRIDE { variational_refinement_delta = val; }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:93:11: error: 'float cv::DISOpticalFlowImpl::getVariationalRefinementGamma() const' marked 'override', but does not override
float getVariationalRefinementGamma() const CV_OVERRIDE { return variational_refinement_gamma; }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:94:10: error: 'void cv::DISOpticalFlowImpl::setVariationalRefinementGamma(float)' marked 'override', but does not override
void setVariationalRefinementGamma(float val) CV_OVERRIDE { variational_refinement_gamma = val; }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:96:10: error: 'bool cv::DISOpticalFlowImpl::getUseMeanNormalization() const' marked 'override', but does not override
bool getUseMeanNormalization() const CV_OVERRIDE { return use_mean_normalization; }
^~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:97:10: error: 'void cv::DISOpticalFlowImpl::setUseMeanNormalization(bool)' marked 'override', but does not override
void setUseMeanNormalization(bool val) CV_OVERRIDE { use_mean_normalization = val; }
^~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:98:10: error: 'bool cv::DISOpticalFlowImpl::getUseSpatialPropagation() const' marked 'override', but does not override
bool getUseSpatialPropagation() const CV_OVERRIDE { return use_spatial_propagation; }
^~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:99:10: error: 'void cv::DISOpticalFlowImpl::setUseSpatialPropagation(bool)' marked 'override', but does not override
void setUseSpatialPropagation(bool val) CV_OVERRIDE { use_spatial_propagation = val; }
^~~~~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp: In constructor 'cv::DISOpticalFlowImpl::DISOpticalFlowImpl()':
C:\opencv\sources\modules\video\src\dis_flow.cpp:232:43: error: request for member 'push_back' in '((cv::DISOpticalFlowImpl*)this)->cv::DISOpticalFlowImpl::variational_refinement_processors', which is of non-class type 'int'
variational_refinement_processors.push_back(VariationalRefinement::create());
^~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:232:53: error: 'VariationalRefinement' has not been declared
variational_refinement_processors.push_back(VariationalRefinement::create());
^~~~~~~~~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp: In member function 'void cv::DISOpticalFlowImpl::prepareBuffers(cv::Mat&, cv::Mat&, cv::Mat&, bool)':
C:\opencv\sources\modules\video\src\dis_flow.cpp:306:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->setAlpha(variational_refinement_alpha);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:307:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->setDelta(variational_refinement_delta);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:308:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->setGamma(variational_refinement_gamma);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:309:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->setSorIterations(5);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:310:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->setFixedPointIterations(variational_refinement_iter);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp: In member function 'void cv::DISOpticalFlowImpl::ocl_prepareBuffers(cv::UMat&, cv::UMat&, cv::InputArray, bool)':
C:\opencv\sources\modules\video\src\dis_flow.cpp:1274:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->setAlpha(variational_refinement_alpha);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:1275:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->setDelta(variational_refinement_delta);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:1276:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->setGamma(variational_refinement_gamma);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:1277:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->setSorIterations(5);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:1278:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->setFixedPointIterations(variational_refinement_iter);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp: In member function 'bool cv::DISOpticalFlowImpl::ocl_calc(cv::InputArray, cv::InputArray, cv::InputOutputArray)':
C:\opencv\sources\modules\video\src\dis_flow.cpp:1403:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->calcUV(u_I0s[i], u_I1s[i],
^
C:\opencv\sources\modules\video\src\dis_flow.cpp: In member function 'void cv::DISOpticalFlowImpl::calc(cv::InputArray, cv::InputArray, cv::InputOutputArray)':
C:\opencv\sources\modules\video\src\dis_flow.cpp:1493:48: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->calcUV(I0s[i], I1s[i], Ux[i], Uy[i]);
^
C:\opencv\sources\modules\video\src\dis_flow.cpp: In member function 'void cv::DISOpticalFlowImpl::collectGarbage()':
C:\opencv\sources\modules\video\src\dis_flow.cpp:1547:44: error: invalid types 'int[int]' for array subscript
variational_refinement_processors[i]->collectGarbage();
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:1548:39: error: request for member 'clear' in '((cv::DISOpticalFlowImpl*)this)->cv::DISOpticalFlowImpl::variational_refinement_processors', which is of non-class type 'int'
variational_refinement_processors.clear();
^~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp: At global scope:
C:\opencv\sources\modules\video\src\dis_flow.cpp:1551:5: error: 'DISOpticalFlow' was not declared in this scope
Ptr<DISOpticalFlow> DISOpticalFlow::create(int preset)
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1551:5: note: suggested alternative: 'DISOpticalFlowImpl'
Ptr<DISOpticalFlow> DISOpticalFlow::create(int preset)
^~~~~~~~~~~~~~
DISOpticalFlowImpl
C:\opencv\sources\modules\video\src\dis_flow.cpp:1551:19: error: template argument 1 is invalid
Ptr<DISOpticalFlow> DISOpticalFlow::create(int preset)
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:1551:21: error: 'DISOpticalFlow' has not been declared
Ptr<DISOpticalFlow> DISOpticalFlow::create(int preset)
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1551:21: warning: no previous declaration for 'int cv::create(int)' [-Wmissing-declarations]
C:\opencv\sources\modules\video\src\dis_flow.cpp: In function 'int cv::create(int)':
C:\opencv\sources\modules\video\src\dis_flow.cpp:1555:9: error: 'DISOpticalFlow' was not declared in this scope
Ptr<DISOpticalFlow> dis = makePtr<DISOpticalFlowImpl>();
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1555:9: note: suggested alternative: 'DISOpticalFlowImpl'
Ptr<DISOpticalFlow> dis = makePtr<DISOpticalFlowImpl>();
^~~~~~~~~~~~~~
DISOpticalFlowImpl
C:\opencv\sources\modules\video\src\dis_flow.cpp:1555:23: error: template argument 1 is invalid
Ptr<DISOpticalFlow> dis = makePtr<DISOpticalFlowImpl>();
^
C:\opencv\sources\modules\video\src\dis_flow.cpp:1555:58: error: invalid user-defined conversion from 'cv::Ptr<cv::DISOpticalFlowImpl>' to 'int' [-fpermissive]
Ptr<DISOpticalFlow> dis = makePtr<DISOpticalFlowImpl>();
~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
In file included from C:/opencv/sources/modules/core/include/opencv2/core/cvstd.hpp:1072,
from C:/opencv/sources/modules/core/include/opencv2/core/base.hpp:58,
from C:/opencv/sources/modules/core/include/opencv2/core.hpp:54,
from C:/opencv/sources/modules/video/include/opencv2/video/tracking.hpp:47,
from C:/opencv/sources/modules/video/include/opencv2/video.hpp:56,
from C:\opencv\sources\modules\video\src\precomp.hpp:46,
from C:\opencv\sources\modules\video\src\dis_flow.cpp:43:
C:/opencv/sources/modules/core/include/opencv2/core/ptr.inl.hpp:222:1: note: candidate is: 'cv::Ptr<T>::operator T*() const [with T = cv::DISOpticalFlowImpl]' <near match>
Ptr<T>::operator T* () const
^~~~~~
C:/opencv/sources/modules/core/include/opencv2/core/ptr.inl.hpp:222:1: note: no known conversion from 'cv::DISOpticalFlowImpl*' to 'int'
C:\opencv\sources\modules\video\src\dis_flow.cpp:1556:8: error: base operand of '->' is not a pointer
dis->setPatchSize(8);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1557:19: error: 'DISOpticalFlow' is not a class, namespace, or enumeration
if (preset == DISOpticalFlow::PRESET_ULTRAFAST)
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1559:12: error: base operand of '->' is not a pointer
dis->setFinestScale(2);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1560:12: error: base operand of '->' is not a pointer
dis->setPatchStride(4);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1561:12: error: base operand of '->' is not a pointer
dis->setGradientDescentIterations(12);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1562:12: error: base operand of '->' is not a pointer
dis->setVariationalRefinementIterations(0);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1564:24: error: 'DISOpticalFlow' is not a class, namespace, or enumeration
else if (preset == DISOpticalFlow::PRESET_FAST)
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1566:12: error: base operand of '->' is not a pointer
dis->setFinestScale(2);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1567:12: error: base operand of '->' is not a pointer
dis->setPatchStride(4);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1568:12: error: base operand of '->' is not a pointer
dis->setGradientDescentIterations(16);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1569:12: error: base operand of '->' is not a pointer
dis->setVariationalRefinementIterations(5);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1571:24: error: 'DISOpticalFlow' is not a class, namespace, or enumeration
else if (preset == DISOpticalFlow::PRESET_MEDIUM)
^~~~~~~~~~~~~~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1573:12: error: base operand of '->' is not a pointer
dis->setFinestScale(1);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1574:12: error: base operand of '->' is not a pointer
dis->setPatchStride(3);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1575:12: error: base operand of '->' is not a pointer
dis->setGradientDescentIterations(25);
^~
C:\opencv\sources\modules\video\src\dis_flow.cpp:1576:12: error: base operand of '->' is not a pointer
dis->setVariationalRefinementIterations(5);
^~
mingw32-make[2]: *** [modules\video\CMakeFiles\opencv_video.dir\build.make:149: modules/video/CMakeFiles/opencv_video.dir/src/dis_flow.cpp.obj] Error 1
mingw32-make[1]: *** [CMakeFiles\Makefile2:4305: modules/video/CMakeFiles/opencv_video.dir/all] Error 2
mingw32-make: *** [Makefile:182: all] Error 2
Please who knows how to get around this?
