ffmpeg INT64_C problem and Workaround

While compiling opencv version 1.0 on Centos 5, the process stopped with an error due to non definition of “INT64_C” in file cvcap_ffmpeg.cpp. After trawling through some forums, i got the following solution:

in /usr/local/include/ffmpeg/avformat.h:

#define INT64_C


#include <stdint.h>

This is not my own workaround. I got this from



There is another workaround; this is done while installing ffmpeg. I do not remember where i got this solution from.

Use -D__STDC_CONSTANT_MACROS while compiling FFMPEG. This is to be added in the CFLAGS i think. One way of doing this is to open the file config.status and add this to the line containing the CFLAGS.

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  • Tim  On April 11, 2008 at 2:47 pm

    Thanks for the information.

    I was able to get around it by exporting:
    CXXFLAGS=-D__STDC_CONSTANT_MACROS before compiling opencv-1.0


  • V Srikrishnan  On May 10, 2008 at 11:41 am

    Hi Tim,
    Thanks for the information. I had found it earlier in some forum(ffmpeg/gcc), I id not remember the links and hence had not posted it.

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