摘要： ffmpeg 默认是用C文件来编译的，如果某个CPP文件想引用ffmpeg中的某些函数或者头文件，有可能出现‘UINT64_C’ was not declared in this scope的错误情形大概如下The same issue i'm getting here when compiling chromium with ffmpeg from svn:In file included from /usr/include/libavutil/avutil.h:81:0,from /usr/include/libavcodec/avcodec.h:30,from out/Relea 阅读全文