cvcap_ffmpeg.cpp:252: error: integer constant is too large for 'long' type
cvcap_ffmpeg.cpp:256: error: integer constant is too large for 'long' type
cvcap_ffmpeg.cpp:260: error: integer constant is too large for 'long' type
cvcap_ffmpeg.cpp:260: error: integer constant is too large for 'long' type
cvcap_ffmpeg.cpp:252: error: 'INT64_C' was not declared in this scope
cvcap_ffmpeg.cpp:256: error: 'INT64_C' was not declared in this scope
cvcap_ffmpeg.cpp:260: error: 'INT64_C' was not declared in this scope
此出错误，摆渡无数找到一个解决方法：
就是修改include/ffmpeg/avformat.h文件加入
#define INT64_C
#define __STDC_CONSTANT_MACROS
#include
反正可以解决问题。
cvcap_ffmpeg.cpp:390: error: 'EDOM' was not declared in this scope
cvcap_ffmpeg.cpp:392: error: 'EINVAL' was not declared in this scope
cvcap_ffmpeg.cpp:394: error: 'EILSEQ' was not declared in this scope
cvcap_ffmpeg.cpp:396: error: 'EIO' was not declared in this scope
cvcap_ffmpeg.cpp:398: error: 'ENOMEM' was not declared in this scope
此处错误原因我也不明，打开文件发现是一个错误处理函数，直接给注释掉。
> Try adding
>
> #define __STDC_CONSTANT_MACROS
>
> before first inclusion of or first inclusion of ffmpeg headers.
> This macro should be defined when using with C++ compiler
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