scale.script


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[0:v]split=outputs=3[for_1080][for_720][for_540];

[for_1080]scale=size=hd1080,split=outputs=2[1080_for_enc][1080_for_metrics];
[for_720] scale=size=hd720, split=outputs=2[720_for_enc] [720_for_metrics];
[for_540] scale=size=qhd,   split=outputs=2[540_for_enc] [540_for_metrics];