这让我疯了。我一直在这个不停的工作一个星期。我在网上查了很多教程但没有帮助。
我已经尝试过这么多，我甚至不记得我尝试过的东西。我可以说我尝试的最后一件事......这是视频RefinePro。
所以我下载opencv2.4.13，创建构建文件夹，打开cmake，配置，生成然后转到终端并输入make。
我明白了：
Richie's Macbook Air:build Richie$ make
[ 2%] Built target zlib
[ 6%] Built target libtiff
[ 10%] Built target libjpeg
[ 14%] Built target libjasper
[ 16%] Built target libpng
[ 23%] Built target IlmImf
[ 26%] Built target opencv_core
[ 31%] Built target opencv_imgproc
[ 32%] Built target opencv_video
[ 32%] Built target opencv_flann
[ 32%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o
In file included from /Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg.cpp:45:
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:71:6: error:
"libswscale is necessary to build the newer OpenCV ffmpeg wrapper"
#error "libswscale is necessary to build the newer OpenCV ffmpeg wrapper"
^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:481:9: error:
use of undeclared identifier 'sws_freeContext'
sws_freeContext(img_convert_ctx);
^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:965:17: error:
use of undeclared identifier 'SWS_BICUBIC'
SWS_BICUBIC,
^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:998:5: error:
use of undeclared identifier 'sws_scale'
sws_scale(
^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:1639:46: error:
use of undeclared identifier 'SWS_BICUBIC'
SWS_BICUBIC,
^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:1645:14: error:
use of undeclared identifier 'sws_scale'
if ( sws_scale(img_convert_ctx, input_picture->data,
^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:1693:9: error:
use of undeclared identifier 'sws_freeContext'
sws_freeContext(img_convert_ctx);
^
/Users/Richie/Downloads/opencv-2.4.13/modules/highgui/src/cap_ffmpeg_impl.hpp:2290:9: warning:
ignoring return value of function declared with warn_unused_result
attribute [-Wunused-result]
avformat_write_header(oc_, NULL);
^~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~
1 warning and 7 errors generated.
make[2]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o] Error 1
make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2
make: *** [all] Error 2
Richie's Macbook Air:build Richie$
从我所看到的，它说
"libswscale is necessary to build the newer OpenCV ffmpeg wrapper"
我试过谷歌搜索无济于事，有人知道吗？
编辑：我确实安装了ffmpeg ......（brew）。