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• Console Log Stream information using ffmpeg node.js

  5 mars 2019, par Matteo

  I have created a work application that links in room encoders to live stream onto Facebook, Twitter and Youtube. I am wondering as to how to properly log the stream quality on the CMD. Below are snippets of the code and where I think the logic should be to properly pull the stream quality and display it in the cmd :

  Pushing Stream :

      if (req.query.french_facebook) {
  
    var streamComplete = req.query.fb_fre_streamURL + req.query.fb_fre_streamKey;
  
    temp = checkValidity('Facebook', 'French', req.query.fb_fre_streamURL, req.query.fb_fre_streamKey, status);
  
    status = temp[0];
  
    valid = temp[1];
  
    if (valid == true) {
  
      var command = `ffmpeg -re -i ${inputURL2('French',req.query.fb_fre_venue)} -c:v copy -acodec aac -ac 1 -ar 44100 -x264-params keyint=60:scenecut=0 -strict -2 -f flv "${streamComplete}"`;
  
      var process = nodeCmd.run(command);
  
      createStream(req.query.username, 'Facebook', 'French', req.query.fb_fre_streamKey, process.pid);
  
    } else {
  
      console.error("ERROR: unable to create stream");
  
    }
  
  }

  App initialization :

      var createError = require('http-errors');
  
  var express = require('express');
  
  var path = require('path');
  
  var cookieParser = require('cookie-parser');
  
  var logger = require('morgan');
  
  
  
  var indexRouter = require('./routes/index');
  
  var usersRouter = require('./routes/users');
  
  
  
  var app = express();
  
  
  
  var fs = require('fs');
  
  
  
  // view engine setup
  
  app.set('views', path.join(__dirname, 'views'));
  
  app.set('view engine', 'ejs');
  
  
  
  // app.use(logger('dev'));
  
  app.use(express.json());
  
  app.use(express.urlencoded({ extended: false }));
  
  app.use(cookieParser());
  
  app.use(express.static(path.join(__dirname, 'public')));
  
  
  
  app.use('/', indexRouter);
  
  app.use('/users', usersRouter);
  
  
  
  // catch 404 and forward to error handler
  
  app.use(function(req, res, next) {
  
    next(createError(404));
  
  });
  
  
  
  // error handler
  
  app.use(function(err, req, res, next) {
  
    // set locals, only providing error in development
  
    res.locals.message = err.message;
  
    res.locals.error = req.app.get('env') === 'development' ? err : {};
  
  
  
    // render the error page
  
    res.status(err.status || 500);
  
    res.render('error');
  
  });
  
  
  
  module.exports = app;

  If there is anything I am not making clear please let me know

• ffmpeg droping session when there is no input , need to wait for an input

  25 mars 2019, par Hovo

  I am trying to live stream to facebook from an application, which is writing frames into image sequence of XXX_Frame.jpg inside a folder.

  I am using a ffmpeg with these commands

  ffmpeg -y -r 15 -f image2 -start_number 0 -i "%0d_Frame.jpg" -i "test.mp3" -muxdelay 1 -preset slow -flush_packets 1 -ar 44100 -b:a 128k -profile:v baseline -acodec aac -vf scale=1280x720 -vcodec libx264 -crf 15 -r 50 -pix_fmt yuvj420p -minrate 50k -maxrate 150k -bufsize 8192k -g 1 -b:v 1200 -f flv "rtmp ://live-api-s.facebook.com:80/rtmp/xxxxxx"

  It is starting to stream faster than 15 frames per second and whenever it finishes up streaming of the available frames it is killing the process and returning error.
  It would be perfect if it was possible to slow down the mux’s read from the input to frame rate speed.

  [flv @ 000001f34347cf00] Failed to update header with correct duration.
  [flv @ 000001f34347cf00] Failed to update header with correct filesize.
  Error writing trailer of rtmp ://live-api-s.facebook.com:80/rtmp/xxxxxx : Error number -10053 occurred

  Any help would be appreciated.

  Expected result is to stream continuously without losing the connection , even sending the last available image continuously.

• FFMPEG delay mutliple overlay videos (with different delays)

  28 avril 2019, par Bamba675

  I’m trying to overlay a video (for example a report) with different other videos or images, like hints to the facebook page or a hint to the website. These other videos or images are smaller than the original and sometimes transparent (rgba).

  I already tried to overlay multiple videos, which works pretty well :
  

  ffmpeg -i 30fps_fhd.mp4 -i sample.mp4 -i timer.webm -i logo.jpg -filter_complex "overlay = x=100:y=1000, overlay = x=30:y=66:eof_action=pass, overlay = x=0:y=0" -acodec copy -t 70 out.mp4

  But now, I want to start some videos or images not at the beginning of the video, instead after a period of time.
  I found flags like ’itsoffset’ or ’setpts’, but I dont know how to apply them on this ’multiple video / image overlay command’.

  LG Bamba