ffmpeg: ‘UINT64_C’ was not declared in this scope (转)

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::,

from /usr/include/libavcodec/avcodec.h:,                

 from out/Release/obj.target/geni/ffmpeg_stubs.cc::

/usr/include/libavutil/common.h: In function 'int32_t av_clipl_int32(int64_t)':

/usr/include/libavutil/common.h::: error: 'UINT64_C' was not declared in this scope

make: *** [out/Release/obj.target/geni/ffmpeg_stubs.o] Error 

可以 在cpp文件中加入

extern "C"{

#ifdef __cplusplus
  #define __STDC_CONSTANT_MACROS
  #ifdef _STDINT_H
   #undef _STDINT_H
  #endif
  # include <stdint.h>
 #endif

}

来解决

 如果在android下用编译。在Android.mk加入

LOCAL_CFLAGS := -D__STDC_CONSTANT_MACROS即可

http://blog.****.net/cjsafty/article/details/7041518