linking error

cap.cpp.obj : error LNK2019: unresolved external symbol "struct CvCapture * __cd
ecl cvCreateCameraCapture_VFW(int)" (?cvCreateCameraCapture_VFW@@YAPAUCvCapture@
@H@Z) referenced in function _cvCreateCameraCapture
cap_ffmpeg.cpp.obj : error LNK2019: unresolved external symbol "struct CvCapture
 * __cdecl cvCreateFileCapture_VFW(char const *)" (?cvCreateFileCapture_VFW@@YAP
AUCvCapture@@PBD@Z) referenced in function "struct CvCapture * __cdecl cvCreateF
ileCapture_FFMPEG_proxy(char const *)" (?cvCreateFileCapture_FFMPEG_proxy@@YAPAU
CvCapture@@PBD@Z)
cap_ffmpeg.cpp.obj : error LNK2019: unresolved external symbol "struct CvVideoWr
iter * __cdecl cvCreateVideoWriter_VFW(char const *,int,double,struct CvSize,int
)" (?cvCreateVideoWriter_VFW@@YAPAUCvVideoWriter@@PBDHNUCvSize@@H@Z) referenced
in function "struct CvVideoWriter * __cdecl cvCreateVideoWriter_FFMPEG_proxy(cha
r const *,int,double,struct CvSize,int)" (?cvCreateVideoWriter_FFMPEG_proxy@@YAP
AUCvVideoWriter@@PBDHNUCvSize@@H@Z)
window.cpp.obj : error LNK2019: unresolved external symbol _cvStartWindowThread
referenced in function "int __cdecl cv::startWindowThread(void)" (?startWindowTh
read@cv@@YAHXZ)
window.cpp.obj : error LNK2019: unresolved external symbol _cvNamedWindow refere
nced in function "void __cdecl cv::namedWindow(class std::basic_string<char,stru
ct std::char_traits<char>,class std::allocator<char> > const &,int)" (?namedWind
ow@cv@@YAXABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@H@Z)
window.cpp.obj : error LNK2019: unresolved external symbol _cvShowImage referenc
ed in function "void __cdecl cv::imshow(class std::basic_string<char,struct std:
:char_traits<char>,class std::allocator<char> > const &,class cv::_InputArray co
nst &)" (?imshow@cv@@YAXABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@
2@@std@@ABV_InputArray@1@@Z)
window.cpp.obj : error LNK2019: unresolved external symbol _cvResizeWindow refer
enced in function "void __cdecl cv::resizeWindow(class std::basic_string<char,st
ruct std::char_traits<char>,class std::allocator<char> > const &,int,int)" (?res
izeWindow@cv@@YAXABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@
@HH@Z)
window.cpp.obj : error LNK2019: unresolved external symbol _cvMoveWindow referen
ced in function "void __cdecl cv::moveWindow(class std::basic_string<char,struct
 std::char_traits<char>,class std::allocator<char> > const &,int,int)" (?moveWin
dow@cv@@YAXABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@HH@Z)

window.cpp.obj : error LNK2019: unresolved external symbol _cvDestroyWindow refe
renced in function "void __cdecl cv::destroyWindow(class std::basic_string<char,
struct std::char_traits<char>,class std::allocator<char> > const &)" (?destroyWi
ndow@cv@@YAXABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z)
window.cpp.obj : error LNK2019: unresolved external symbol _cvDestroyAllWindows
referenced in function "void __cdecl cv::destroyAllWindows(void)" (?destroyAllWi
ndows@cv@@YAXXZ)
window.cpp.obj : error LNK2019: unresolved external symbol _cvCreateTrackbar2 re
ferenced in function "int __cdecl cv::createTrackbar(class std::basic_string<cha
r,struct std::char_traits<char>,class std::allocator<char> > const &,class std::
basic_string<char,struct std::char_traits<char>,class std::allocator<char> > con
st &,int *,int,void (__cdecl*)(int,void *),void *)" (?createTrackbar@cv@@YAHABV?
$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@0PAHHP6AXHPAX@Z2@Z)
window.cpp.obj : error LNK2019: unresolved external symbol _cvGetTrackbarPos ref
erenced in function "int __cdecl cv::getTrackbarPos(class std::basic_string<char
,struct std::char_traits<char>,class std::allocator<char> > const &,class std::b
asic_string<char,struct std::char_traits<char>,class std::allocator<char> > cons
t &)" (?getTrackbarPos@cv@@YAHABV?$basic_string@DU?$char_traits@D@std@@V?$alloca
tor@D@2@@std@@0@Z)
window.cpp.obj : error LNK2019: unresolved external symbol _cvSetTrackbarPos ref
erenced in function "void __cdecl cv::setTrackbarPos(class std::basic_string<cha
r,struct std::char_traits<char>,class std::allocator<char> > const &,class std::
basic_string<char,struct std::char_traits<char>,class std::allocator<char> > con
st &,int)" (?setTrackbarPos@cv@@YAXABV?$basic_string@DU?$char_traits@D@std@@V?$a
llocator@D@2@@std@@0H@Z)
window.cpp.obj : error LNK2019: unresolved external symbol _cvSetMouseCallback r
eferenced in function "void __cdecl cv::setMouseCallback(class std::basic_string
<char,struct std::char_traits<char>,class std::allocator<char> > const &,void (_
_cdecl*)(int,int,int,int,void *),void *)" (?setMouseCallback@cv@@YAXABV?$basic_s
tring@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@P6AXHHHHPAX@Z1@Z)
window.cpp.obj : error LNK2019: unresolved external symbol _cvWaitKey referenced
 in function "int __cdecl cv::waitKey(int)" (?waitKey@cv@@YAHH@Z)
window.cpp.obj : error LNK2019: unresolved external symbol "void __cdecl cvSetMo
deWindow_W32(char const *,double)" (?cvSetModeWindow_W32@@YAXPBDN@Z) referenced
in function _cvSetWindowProperty
window.cpp.obj : error LNK2019: unresolved external symbol "double __cdecl cvGet
ModeWindow_W32(char const *)" (?cvGetModeWindow_W32@@YANPBD@Z) referenced in fun
ction _cvGetWindowProperty
window.cpp.obj : error LNK2019: unresolved external symbol "double __cdecl cvGet
PropWindowAutoSize_W32(char const *)" (?cvGetPropWindowAutoSize_W32@@YANPBD@Z) r
eferenced in function _cvGetWindowProperty
window.cpp.obj : error LNK2019: unresolved external symbol "double __cdecl cvGet
RatioWindow_W32(char const *)" (?cvGetRatioWindow_W32@@YANPBD@Z) referenced in f
unction _cvGetWindowProperty
window.cpp.obj : error LNK2019: unresolved external symbol "double __cdecl cvGet
OpenGlProp_W32(char const *)" (?cvGetOpenGlProp_W32@@YANPBD@Z) referenced in fun
ction _cvGetWindowProperty
bin\opencv_highgui244d.dll : fatal error LNK1120: 20 unresolved externals
LINK Pass 1 failed. with 1120
[351/820] Building CXX object modules\...\opencv_video.dir\src\camshift.cpp.obj
ninja: build stopped: subcommand failed.