SMI (Video subscript file format) timing sync

smi_timing.groovy

if (args.length < 2) {
	println "Usage groovy smi_timing filename milliseconds-to-adjust [encoding:default cp949]"
	System.exit(-1)
}

def smi = new File(args[0])
def millis = Long.parseLong(args[1])
def encoding = args.length == 3 ? args[2] : "cp949"

println "$smi, $millis, $encoding"

def text = smi.getText(encoding)
// change the pattern
def converted = text.replaceAll(/Start=([0-9]+)/) {
	"Start=" + (Long.parseLong(it[1]) + millis)
}

smi.setText(converted, encoding)