OMG ITS FIXED :DDD !!!!

index.js

@@ -1,8 +1,9 @@
+const { randomInt } = require('crypto');
 const ytdl = require('ytdl-core'),
   fs = require('fs'),
   path = require('path'),
   express = require('express'),
-  ffmpeg = require('fluent-ffmpeg'),
+  ffmpeg = require('ffmpeg'),
   bodyParser = require('body-parser')
 
 const PORT = process.env.PORT || 8080
@@ -18,7 +19,7 @@ process.on('uncaughtException', (err, origin) => {
 
 app.use(bodyParser.urlencoded({ extended: false }))
 
-app.get("/download", (req, res) => {
+app.get("/download", async (req, res) => {
   const filename = req.query.filename
   const url = req.query.url
   const format = req.query.format
@@ -29,17 +30,36 @@ app.get("/download", (req, res) => {
     return
   }
 
-  if (format != "mp4" && format != "webm") {
-    res.header('Content-Disposition', `attachment; filename="${filename}.${format};"`);
+  res.header('Content-Disposition', `attachment; filename="${filename}.${format}"`);
 
-    var proc = new ffmpeg({ source: ytdl(url, { 'quality': quality }) })
-      .format(format)
-      .pipe(res)
+  var ytpath = path.join(__dirname, 'cached/' + ytdl.getVideoID(url) + String(Math.floor(Math.random() * 100000)) + '.mp4')
+
+  var vidinfo = await ytdl.getBasicInfo(url)
+
+  var ytvid = ytdl(url, { 'quality': quality })
+  .pipe(fs.createWriteStream(ytpath))
+  .on("close", ()=> {
+    console.log("Downloaded!")
+    var proc = new ffmpeg(ytpath)
+    proc.then(function(video) {
+      video
+      .setVideoDuration(vidinfo.videoDetails.lengthSeconds)
+      .setVideoFormat(format)
+      .save('cached/' + ytdl.getVideoID(url) + String(Math.floor(Math.random() * 100000)) + "Converted." + format,function  (err, file) {
+        console.log("Converted!")
+        fs.createReadStream(file).pipe(res)
+        .on("close", () => {
+          console.log("Freed!")
+          fs.unlinkSync(file)
+          if (fs.existsSync(ytpath)) {
+            fs.unlinkSync(ytpath)
+          }
+        })
+      })
+    })
+  })
+  
 
-  } else {
-    res.header('Content-Disposition', `attachment; filename="${filename}.${format}"`);
-    ytdl(url, { 'format': format, 'quality': quality }).pipe(res);
-  }
 
 });