#如果不是搭建好了集羣，絕對不用這麼古老的版本，血淚史啊
1.編譯ffmpeg + opencv報錯
/usr/bin/ld: warning: libswresample.so.1, needed by /usr/local/ffmpeg/lib/libavcodec.so, not found (try using -rpath or -rpath-link)
/usr/local/ffmpeg/lib/libavcodec.so: undefined reference to swr_init@LIBSWRESAMPLE_1' /usr/local/ffmpeg/lib/libavcodec.so: undefined reference toswr_close@LIBSWRESAMPLE_1’
/usr/local/ffmpeg/lib/libavcodec.so: undefined reference to swr_convert@LIBSWRESAMPLE_1' /usr/local/ffmpeg/lib/libavcodec.so: undefined reference toswr_is_initialized@LIBSWRESAMPLE_1’
/usr/local/ffmpeg/lib/libavcodec.so: undefined reference to swr_free@LIBSWRESAMPLE_1' /usr/local/ffmpeg/lib/libavcodec.so: undefined reference toswr_alloc@LIBSWRESAMPLE_1’
解決方案：
將ffmpeg安裝目錄下的三個文件
libswresample.so
libswresample.so.3
libswresample.so.3.1.100
移到opencv構建目中，就是你執行cmake …的位置
2.openCV暫時遇到的報錯
沒有生成jar包
cmake的時候檢查的時候，檢測ant 必須是 yes
jdk那裏 必須是yes
3.運行opencv程序，一直打不開視頻，一直再
camera.open(url) 阻塞 原因：安裝cmake的時候，ffmpeg必須是yes
