Convert mediainfo duration to seconds

parseDuration.js

function parseDuration(duration) {
	let durationInSeconds = 0

	const hourIndex = duration.indexOf('h')
	if(hourIndex > -1) {
		let hours = parseInt(duration.substr(0, hourIndex), 10)
		duration = duration.substr(hourIndex + 1)
		durationInSeconds += hours * 60 * 60
	}
	const minuteIndex = duration.indexOf('mn')
	if(minuteIndex > -1) {
		let minutes = parseInt(duration.substr(0, minuteIndex), 10)
		duration = duration.substr(minuteIndex + 2)
		durationInSeconds += minutes * 60
	}
	const secondIndex = duration.indexOf('s')
	if(secondIndex > -1) {
		let seconds = parseInt(duration.substr(0, secondIndex), 10)
		durationInSeconds += seconds
	}

	return durationInSeconds
}

parseDuration('1mn 16s') // 76

Thanks for this function. On osx they already convert to seconds. If you add this on line 4 it will work for all platforms.

if(Number(duration) == duration){ //is number
	return parseInt(duration);
}