libavfilter/vf_sab.c: In function 'open_filter_param': libavfilter/vf_sab.c:154:11: error: implicit declaration of function 'sws_get_gaussian_vec'; did you mean 'sws_getGaussianVec'? [-Werror=implicit-function-declaration] ret = sws_get_gaussian_vec(&vec, f->pre_filter_radius, f->quality); ^~~~~~~~~~~~~~~~~~~~ sws_getGaussianVec cc1: some warnings being treated as errors make: *** [ffbuild/common.mak:81: libavfilter/vf_sab.o] Error 1 make: *** Waiting for unfinished jobs....