Constant HEVC_REACH_FINER 

const HEVC_REACH_FINER: u32 = 6;

HevcEncoder::reach_finer: the predicted frames of either library at a quantizer leave the motion’s coarse blocks as they are. x265’s (4.2) cleanup of 1080p text ended at 45.0-46.3 dB at the paint-over quantizer and at 49.7-52.4 six steps finer at 1 and 2 Mbit/s, where its key frame at the paint-over quantizer decodes at 50.0, on a fifth to three fifths more bytes over a few seconds more (twelve came to 50.4-55.9 over up to 29 s); kvazaar’s at 8 fps 0.5 and 1 Mbit/s at 44.4-45.0 against 47.4-47.9, its rate control settling about the paint-over quantizer at 2 Mbit/s whatever the cleanup asks (44.8-46.8 dB either way).