filter_rgb        245 libavfilter/vf_fade.c     else if (s->alpha)    filter_rgb(s, frame, slice_start, slice_end, 1, 4);
filter_rgb        246 libavfilter/vf_fade.c     else if (s->bpp == 3) filter_rgb(s, frame, slice_start, slice_end, 0, 3);
filter_rgb        247 libavfilter/vf_fade.c     else if (s->bpp == 4) filter_rgb(s, frame, slice_start, slice_end, 0, 4);