爱站程序员基地mmp,心里真的是一万只cnm飘过，好心累
- 1.安装时遇到的第一个问题
- 2. 解决方法
- 3.新的问题又来了
- 4.终结方法
1.安装时遇到的第一个问题
上问题代码：
/usr/bin/ld: warning: libopencv_core.so.2.4, needed by //usr/lib/x86_64-linux-gnu/libavfilter-ffmpeg.so.5, not found (try using -rpath or -rpath-link)/usr/bin/ld: warning: libopencv_imgproc.so.2.4, needed by //usr/lib/x86_64-linux-gnu/libavfilter-ffmpeg.so.5, not found (try using -rpath or -rpath-link)//usr/lib/x86_64-linux-gnu/libavfilter-ffmpeg.so.5: undefined reference to `cvSmooth\'//usr/lib/x86_64-linux-gnu/libavfilter-ffmpeg.so.5: undefined reference to `cvErode\'//usr/lib/x86_64-linux-gnu/libavfilter-ffmpeg.so.5: undefined reference to `cvReleaseStructuringElement\'//usr/lib/x86_64-linux-gnu/libavfilter-ffmpeg.so.5: undefined reference to `cvCreateStructuringElementEx\'//usr/lib/x86_64-linux-gnu/libavfilter-ffmpeg.so.5: undefined reference to `cvCreateImageHeader\'//usr/lib/x86_64-linux-gnu/libavfilter-ffmpeg.so.5: undefined reference to `cvDilate\'collect2: error: ld returned 1 exit statustools/VideoViewer/CMakeFiles/VideoViewer.dir/build.make:122: recipe for target \'tools/VideoViewer/VideoViewer\' failedmake[2]: *** [tools/VideoViewer/VideoViewer] Error 1CMakeFiles/Makefile2:289: recipe for target \'tools/VideoViewer/CMakeFiles/VideoViewer.dir/all\' failedmake[1]: *** [tools/VideoViewer/CMakeFiles/VideoViewer.dir/all] Error 2Makefile:149: recipe for target \'all\' failedmake: *** [all] Error 2
各位老铁也一定百度了不少，也看得懂这个问题出在哪
问题就处在ffmpeg不兼容，可能是版本原因
2. 解决方法
卸载ffmpeg
sudo apt-get purge ffmpeg
卸载后在官网上手动下载：http://ffmpeg.org/releases/ffmpeg-4.3.tar.xz
再解压、安装。
3.新的问题又来了
当再重新进入pangolin/bulid/中编译make时，又出现错误如下：
src/CMakeFiles/pangolin.dir/build.make:662: recipe for target \'src/CMakeFiles/pangolin.dir/video/video_output.cpp.o\' failedmake[2]: *** [src/CMakeFiles/pangolin.dir/video/video_output.cpp.o] Error 1make[2]: *** Waiting for unfinished jobs....src/CMakeFiles/pangolin.dir/build.make:638: recipe for target \'src/CMakeFiles/pangolin.dir/video/video.cpp.o\' failedmake[2]: *** [src/CMakeFiles/pangolin.dir/video/video.cpp.o] Error 1CMakeFiles/Makefile2:135: recipe for target \'src/CMakeFiles/pangolin.dir/all\' failedmake[1]: *** [src/CMakeFiles/pangolin.dir/all] Error 2Makefile:127: recipe for target \'all\' failedmake: *** [all] Error 2
还是找啊找
最后还是看到博客：Ubuntu 14.04下安装Pagolin遇到的问题及解决方法（之一）中的方法才成功安装。
4.终结方法
到Pagolin/src文件夹下，在CMakeList.txt中删去下面这段代码（屏蔽掉ffmpeg的影响）：
find_package(FFMPEG QUIET)if(BUILD_PANGOLIN_VIDEO AND FFMPEG_FOUND)set(HAVE_FFMPEG 1)list(APPEND INTERNAL_INC ${FFMPEG_INCLUDE_DIRS} )list(APPEND LINK_LIBS ${FFMPEG_LIBRARIES} )list(APPEND HEADERS ${INCDIR}/video/drivers/ffmpeg.h)list(APPEND SOURCES video/drivers/ffmpeg.cpp)list(APPEND VIDEO_FACTORY_REG RegisterFfmpegVideoFactory )list(APPEND VIDEO_FACTORY_REG RegisterFfmpegVideoOutputFactory )if(_GCC_)# FFMPEG is a real pain for deprecating the API.set_source_files_properties(video/drivers/ffmpeg.cpp PROPERTIES COMPILE_FLAGS \"-Wno-deprecated-declarations\")endif()message(STATUS \"ffmpeg Found and Enabled\")endif()
【可能原因】ffmpeg库和Pagolin版本之间可能存在冲突。本文的解决办法，以及其他可能的解决方法（如修改Pagolin的部分代码）和原因请参见下面这个帖子：
https://github.com/stevenlovegrove/Pangolin/issues/27
