ffmpeg video conversion

convert.js

var start = new Date();

var ffmpeg = require('fluent-ffmpeg');
var path = require('path');

const outputFolder = './out';
let outputName = 'gopro';
let outputPath = path.join(outputFolder, outputName);

let inputPath = './seed-videos/MAH04656.MP4'
inputPath = './seed-videos/GOPR0426.MP4'



let pMP4 = new Promise(
    (resolve, reject) => {
        var startMP4 = new Date();
        ffmpeg(inputPath)
            .output(`${outputPath}.mp4`)
            .on('end', function() {
                resolve(new Date() - startMP4);
            })
            .run();
    }
);

let pWEBM = new Promise(
    (resolve, reject) => {
        var startWEBM = new Date();
        ffmpeg(inputPath)
            .output(`${outputPath}.webm`)
            .on('end', function() {
                resolve(new Date() - startWEBM);
            })
            .run();
    }
);

let pAVI = new Promise(
    (resolve, reject) => {
        var startAVI = new Date();
        ffmpeg(inputPath)
            .output(`${outputPath}.avi`)
            .on('end', function() {
                resolve(new Date() - startAVI);
            })
            .run();
    }
);


Promise.all([pMP4, pWEBM, pAVI]).then(values => {
    console.log(values);
    var end = new Date() - start;
    console.log("total time: " + end);
});