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converter.js
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converter.js
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const fs = require('fs');
const path = require('path');
const ffmpeg = require('fluent-ffmpeg');
const { finished } = require('stream');
module.exports = { convert: convert };
// Main function =======================
async function convert(directory, from, format, rate, removeSilence, redoAllFiles, threads, log) {
// List all files in a directory in Node.js recursively in a synchronous fashion
// This is where the fun begins
let walk = walkSync(directory);
let filesUnfiltered = walk[0];
let folders = walk[1];
let files = [];
let otherFiles = filesUnfiltered;
let fails = []
// Sorts the file tree into things to sort, and things to copy.
for (let i = 0; i < from.length; i++) {
files = files.concat(filesUnfiltered.filter(word => word.endsWith("." + from[i])));
otherFiles = otherFiles.filter(word => !word.endsWith("." + from[i]));
}
// Rebuilds the folder tree
for (let j = 0; j < folders.length; j++) {
let folder = folders[j].slice(0, directory.length) + " " + format + folders[j].slice(directory.length);
if (!fs.existsSync(folder)) {
fs.mkdirSync(folder);
}
}
// Actually does the conversion
let jobs = [];
let currentJobs = 0;
let finishedJobs = 0;
for (let i = 0; i < files.length; i++) {
let input = files[i];
let output = files[i].slice(0, directory.length) + " " + format + path.parse(files[i].slice(directory.length)).dir + "/" + path.parse(files[i].slice(directory.length)).name + "." + format;
console.log("FFM-Pegging file " + (i + 1) + " out of " + files.length + ":"); // lol ffm-pegging
console.log(input);
jobs.push(ffmpegSync(input, output, redoAllFiles, rate, removeSilence).then(
() => {
jobs[i] = true;
},
(error) => {
console.log("\x1b[31mFile failed to convert: " + input + "\x1b[37m");
fs.unlinkSync(output);
fails.push(input);
jobs[i] = true;
}
).finally(
() => {
currentJobs--;
finishedJobs++;
console.log((((finishedJobs) / files.length) * 100).toFixed(2) + "% complete.");
console.log("...");
}));
currentJobs++;
if (currentJobs >= threads) {
await Promise.race(filterJobs(jobs))
}
}
await Promise.all(jobs);
// Copies the remaining files to the right places
for (let k = 0; k < otherFiles.length; k++) {
let input = otherFiles[k];
let output = otherFiles[k].slice(0, directory.length) + " " + format + otherFiles[k].slice(directory.length);
console.log("Copying file: " + output);
console.log((((k + 1) / otherFiles.length) * 100).toFixed(2) + "% complete.");
let error = copySync(input, output);
if (error) {
console.error(error);
fs.unlinkSync(output);
fails.push(input);
}
}
// Prints out results nicely
if (fails.length == 0) {
console.log("Job done sucessfully!");
console.log("No log file created (no errors)");
} else {
console.log("Job done with \x1b[31m" + fails.length + "\x1b[37m errors:");
console.log(fails);
if (log) {
console.log("Writing log to " + log);
for (let i = 0; i < fails.length; i++) {
fs.appendFileSync(log, "Failed to convert or copy file: " + fails[i] + "\n");
}
}
}
}
// Functions =======================
function walkSync(dir, filelist, dirlist) { // (Shamelessly stolen from StackOverflow)
let files = fs.readdirSync(dir);
var dirlist = dirlist || [];
filelist = filelist || [];
files.forEach(function (file) {
if (fs.statSync(path.join(dir, file)).isDirectory()) {
dirlist.push(path.join(dir, file));
let temp = walkSync(path.join(dir, file), filelist, dirlist);
filelist = temp[0];
dirlist = temp[1];
} else {
filelist.push(path.join(dir, file));
}
});
dirlist.unshift(dir);
return [filelist, dirlist];
};
function filterJobs(queue) {
for (j = 0; j < queue.length; j++) {
if (queue[j] === true) {
queue = queue.slice(0, j).concat(queue.slice(j + 1, queue.length));
j--;
}
}
return queue
}
async function ffmpegSync(input, output, redo, rate, removeSilence, i) {
return new Promise((resolve, reject) => {
if (fs.existsSync(output)) {
if (!redo) {
console.log("\x1b[32mFile " + output + " already exists. Skipping...\x1b[37m"); // C O L O R S
return resolve();
}
try { fs.unlinkSync(output) } catch (error) { return reject() }
}
let peg = ffmpeg()
.input(input)
.audioCodec(type)
.withAudioBitrate(rate + "k")
if (removeSilence) {
peg.audioFilters("areverse,silenceremove=start_periods=1,areverse");
}
peg.save(output)
.on('end', () => {
resolve()
}).on('error', () => {
reject()
})
})
}
function copySync(input, output, redo) {
if (fs.existsSync(output)) {
if (!redo) {
console.log("\x1b[32mFile " + output + " already exists. Skipping...\x1b[37m"); // C O L O R S
return null;
} else {
try { fs.unlinkSync(output) } catch (error) { return error }
}
}
try {
fs.copyFileSync(input, output);
} catch (error) {
return error;
}
return null;
}