compiling obs

make
/usr/bin/ld: /usr/local/lib/libavcodec.a(avpacket.o): relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC
/usr/local/lib/libavcodec.a: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
make[2]: *** [libobs/libobs.so.0] Error 1
make[1]: *** [libobs/CMakeFiles/libobs.dir/all] Error 2
make: *** [all] Error 2