BLEND_FACTOR_DEPTH  254 libavfilter/vf_framerate.c                     >> BLEND_FACTOR_DEPTH(nbits);       \
BLEND_FACTOR_DEPTH  266 libavfilter/vf_framerate.c         s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH(8);
BLEND_FACTOR_DEPTH  269 libavfilter/vf_framerate.c         s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH(16);