linux - Error with including ffmpeg to a project -

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i have faced problem compilation project including ffmpeg library , have no idea error.

/usr/lib/i386-linux-gnu/libavformat.a(utils.o): undefined reference symbol 'av_reduce@@libavutil_51' ffmpeg          c/c++ problem

and here linker

invoking: gcc c++ linker g++ -l/usr/lib/i386-linux-gnu -o "ffmpeg"  ./ffmpeg.o   -lpthread -lswscale -lavdevice -lavutil -lavformat -lavcodec -lavfilter -lm -lz -lmp3lame -lpostproc -ldl -lx11 -lsdl -lrt -lswresample

if me t great. thx

use : error ffmpeg

also use:

ld --verbose -l * * lib u're looking

and ensure linker found library expect( path compiled libs).


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