CreateReadStream not working with certain videos

[kkotwal94]

I'm not sure where to begin, but I can't stream every mp4 video i upload, primary ones with higher quality/resolution, the network tab shows 0 bytes coming in, and I just wanted to confirm whether it was the way I did things or not:

busboy.on('file', function(fieldname, file, filename, encoding, mimetype) {
    //console.log('got file', filename, mimetype, encoding);
    var writeStream = gfs.createWriteStream({
      _id: fileId,
      filename: filename,
      mode: 'w',
      content_type: mimetype,
    });
    file.pipe(writeStream);
  }).on('finish', function() {
    // show a link to the uploaded file
    req.user.videos.push(fileId);
    req.user.save();
    //console.log(req.user);

    res.end();

    /*var proc = new ffmpeg('/Documents/20000pitches/parkour.mp4')
  .takeScreenshots({
      count: 1,
      timemarks: [ '600' ] // number of seconds
    }, '/', function(err) {
    console.log('screenshots were saved')
  });
*/
  });

  req.pipe(busboy);
});

app.get('/file/:id', function(req, res) {
  gfs.findOne({ _id: req.params.id }, function (err, file) {
    if (err) return res.status(400).send(err);
    if (!file) return res.status(404).send('');

    res.set('Content-Type', file.contentType);
    res.set('Content-Disposition', 'attachment; filename="' + file.filename + '"');

    var readstream = gfs.createReadStream({
      _id: file._id
    });

    readstream.on("error", function(err) {
      console.log("Got error while processing stream " + err.message);
      res.end();
    });

    readstream.pipe(res);
  });
});

It does work sometimes, for example if I take a video from youtube, download the mp4 and upload it, it will play, however if I record a video from my android phone, upload it to dropbox, then from my comp to the web application it wont play. I went more in depth in stack overflow, but I don't know if this could be a gridfs issue or a player issue. I mostly used 3/4 players and all had the same result:

http://stackoverflow.com/questions/36760404/express-multer-uploading-moderate-large-files-not-playing-on-player

The version number is "gridfs-stream": "^1.1.1" atleast, thanks.