在Mac上构建openCV 3.0.0时出错

Question

我进入了通过CMake（配置和生成）成功填充构建文件的阶段。

一旦我通过终端在build目录中运行make ，我会得到48％的致命错误，以及之前的其他一些错误。

[ 47%] Building CXX object modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_mjpeg_decoder.cpp.o
[ 47%] Building CXX object modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_ffmpeg.cpp.o
[ 48%] Building CXX object modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_qtkit.mm.o
/Users/casparwylie/Desktop/Stuff/Programming/opencv/modules/videoio/src/cap_qtkit.mm:297:14: warning: null passed to a callee that requires a non-null argument [-Wnonnull]
    [NSTimer scheduledTimerWithTimeInterval:100 target:nil selector:@selector(doFireTimer:) userInfo:nil repeats:YES];
             ^                                         ~~~
1 warning generated.
[ 48%] Linking CXX shared library ../../lib/libopencv_videoio.dylib
Undefined symbols for architecture x86_64:
  "_CMBlockBufferCreateWithMemoryBlock", referenced from:
      _videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
  "_CMSampleBufferCreate", referenced from:
      _videotoolbox_common_end_frame in libavcodec.a(videotoolbox.o)
  "_CMVideoFormatDescriptionCreate", referenced from:
      _av_videotoolbox_default_init2 in libavcodec.a(videotoolbox.o)
  "_ModPlug_GetCurrentOrder", referenced from:

这个错误意味着什么，是否有任何修复或解决方法？

Answer 1

我有完全相同的问题。 在我的情况下，它是由于缺少ffmpeg引起的。 你可以安装ffmpeg

brew install ffmpeg

通常，'arcgitecture的未定义符号......'与缺少的库有关。

Answer 2

我有同样的问题编译kxmovie，结果我需要添加对coremedia框架和videotoolbox框架的引用，之后，链接很好

Answer 3

在构建阶段链接coremedia ， videotoolbox框架

Answer 4

链接CoreMedia，VideoToolBox，构建阶段的安全框架。

或者您可以修改以下代码并将其添加到opencv-xxx / modules / highgui / CMakeLists.txt文件中：

find_library(CORE_MEDIA CoreMedia)
if (NOT CORE_MEDIA)
    message(FATAL_ERROR "CoreMedia not found")
endif()

find_library(VIDEO_TOOL_BOX VideoToolBox)
if (NOT VIDEO_TOOL_BOX)
    message(FATAL_ERROR "VideoToolBox not found")
endif()

find_library(SECURITY Security)
if (NOT SECURITY)
    message(FATAL_ERROR "Security not found")
endif()

target_link_libraries(${the_module} ${CORE_MEDIA} ${VIDEO_TOOL_BOX} ${SECURITY})

关键是在opencv_highgui模块的CMakeLists.txt文件中使用find_library和target_link_libraries。