Given: i30-telecast = [A][a][B][b][C][c][D][d][E][e] And given: p24 = [A/a][B/b][C/c][D/d] i30-telecine = [A][a][B][b][B][c][C][d][D][d] Can ffmpeg do this: [A/a][AB/b][BC/bc][C/cd][D/d] ? If so, what lib & what args/parms?