FT_ERRMSG         391 libavfilter/vf_drawtext.c                fontsize, FT_ERRMSG(err));
FT_ERRMSG         463 libavfilter/vf_drawtext.c                s->fontfile, FT_ERRMSG(err));
FT_ERRMSG         746 libavfilter/vf_drawtext.c                "Could not load FreeType: %s\n", FT_ERRMSG(err));