alpha_composite   626 libavfilter/vf_overlay.c         alpha_composite(src, dst, src_w, src_h, dst_w, dst_h, x, y, jobnr, nb_jobs);
alpha_composite   655 libavfilter/vf_overlay.c         alpha_composite(src, dst, src_w, src_h, dst_w, dst_h, x, y, jobnr, nb_jobs);