.t icf+4_b 20 0.36 - mp4 -vf "split=3[a][b][t];[a]format=gray,curves=r=0/1 0.5/1 1/0:g=0/1 0.5/0 1/0:b=0/1 0.5/1 1/0[aa];[b]format=gray,curves=all=0/1 0.5/1 1/1[bb];[aa][bb]alphamerge[c];[t][c]overlay",format=yuv420p -filter_complex "[0:a]rubberband=pitch=2^(7/12):window=short:transients=crisp:detector=2.14748e+09/4.9[a1];[0:a]rubberband=pitch=2^(-5/12):window=short:transients=crisp:detector=2.14748e+09/4.9[a2];[a1][a2]amix=2,volume=2,atrim=0.02[outa]" -map 0:v -map "[outa]"
