libavfilter/avfiltergraph.c: In function 'avfilter_graph_free':
libavfilter/avfiltergraph.c:135:5: warning: 'resample_lavr_opts' is deprecated [-Wdeprecated-declarations]
     av_freep(&(*graph)->resample_lavr_opts)
     ^
In file included from libavfilter/avfiltergraph.c:39:0:
libavfilter/avfilter.h:857:32: note: declared here
     attribute_deprecated char *resample_lavr_opts   ///< libavresample options to use for the auto-inserted resample filters
                                ^
libavfilter/f_metadata.c: In function 'print_csv_escaped':
libavfilter/f_metadata.c:225:5: error: ISO C90 forbids variable length array 'buf' [-Werror=vla]
     char buf[strlen(src) * 2 + 2]
     ^
libavfilter/f_metadata.c: At top level:
libavfilter/f_metadata.c:246:13: warning: 'csv_escape' defined but not used [-Wunused-function]
 static void csv_escape(const char *src, char **dst, const char csv_sep)
             ^
cc1: some warnings being treated as errors
make: *** [libavfilter/f_metadata.o] Error 1
make: *** Waiting for unfinished jobs....