ubuntu（linux）下安装openCV（ffmpeg导致的编译不通过的解决办法）

    1.opencv-3.1.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1313:21: error: ‘CODEC_FLAG_GLOBAL_HEADER’ was not declared in this scope          c->flags |= CODEC_FLAG_GLOBAL_HEADER; 2.opencv-3.1.0/modul

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