the signal - behind the matrix

"h264_nvenc" "-profile:v" "high" "-pix_fmt" "yuv420p" "-g" "30" "-preset" "p7" "-tune" "hq" "-rc" "constqp" "-qp" "18" "-rc-lookahead" "20" "-spatial_aq" "1" "-aq-strength" "15" "-b:v" "0" "-map" "0:a?" "-map_metadata:s:a:0" "0:s:a:0" "-c:a" "copy" "-bsf:a:0" "aac_adtstoasc" "-map_metadata" "0"