BLEND_AVERAGE 111 libavfilter/vf_blend.c { "average", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE}, 0, 0, FLAGS, "mode" },\ BLEND_AVERAGE 320 libavfilter/vf_blend.c case BLEND_AVERAGE: param->blend = blend_average; break;