Send MediaRecorder blobs to server and build file on backend

Question

I\'m working on a website using nodejs and SailsJs.

My objective is send the blobs generated by MediaRecorder.ondataavailable event (which returns small blobs) to the se

Answer 1

So I solved it by doing the following (once I get the merge action call):

const dir = `${__dirname}/.tmp/`;
const fileName = getFileNameFromEvent(eventId);
const path = dir + fileName;
//First get the path for every file chunk ordered (otherwise it'll lose quality)
let recParts = await RecordingParts.find({
      where: {
        filename: fileName
      }
    }).sort('index ASC');

let wstream = fs.createWriteStream(path);
for (let i = 0; i < recParts.length; i++){
      let aux = await readFile(recParts[i].tmpPath, null);
      wstream.write(aux);
      //Delete chunks
      fs.unlink(recParts[i].tmpPath, (err) => {
        if (err) throw err;
      });
    }

    wstream.end();

//Utils function
const readFile = (path, opts = 'utf8') =>
  new Promise((res, rej) => {
    fs.readFile(path, opts, (err, data) => {
      if (err) rej(err);
      else res(data)
    })
  });

After

wstream.end();

You will have the merged file at path