ommon.h(30) : fatal error C1189: #error : missing -D__STDC_CONSTANT_MACROS / #define __STDC_CONSTANT_MACROS
原因：
FFmpeg is written in C99, thus some features may not be compilable or usable in C++.
Anyway, for most purposes, including FFmpeg headers in a C++ application should be rather straightforward.
First, to include the FFmpeg headers within your C++ application you need to explicitly state that you are including C code. You can do this by encompassing your FFmpeg includes usingextern "C", like in:
extern "C" {
#include <libavutil/imgutils.h>
#include <libavcodec/avcodec.h>
#include <libswscale/swscale.h>
}
Second, you may need to append -D__STDC_CONSTANT_MACROS to your CXXFLAGS flags, if the compiler complains about ’UINT64_C’ was not declared in this scope.