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• capture video conference between 1:1 user and broadcast to an rtmp url

  20 octobre 2020, par Asif Alamgir

  I am currently working on nodejs and socket app that is currently doing 1:1 video conference that is using webrtc. Videos are two separate element in the html and i would like to merge them together so that i can broadcast to rtmp url for public view (2:many). Is this possible

  


  For webrtc, i followed this tutorial https://www.youtube.com/watch?v=DvlyzDZDEq4, and for broadcasting i am using ffmpeg which current does 1 video stream.

  


  Please confirm if this is doable

  


  Update

  


  I was able to merge the video using
https://www.npmjs.com/package/video-stream-merger

  


  And now the final issue

  


  i am receiving merger.result which is merged stream and I tried to create a mediaRecorder object. Callback method for MediaRecorder ondataavailable is called only once but not every 250ms which i need to broadcast to youtube. How can i do this ?

  


  var merger = new VideoStreamMerger(v_opts);
...
...
merger.start()
myMediaRecorder = new MediaRecorder(merger.result);
myMediaRecorder.start(250);
myMediaRecorder.ondataavailable = function (e) {
    console.log("DataAvailable")
    //socket.emit("binarystream", e.data);
    state = "start";
    //chunks.push(e.data);
}


  


• Reload scrolling drawtext filter in ffmpeg only while off screen

  3 janvier 2021, par J45p3r

  I have a drawtext filter in ffmpeg that scrolls right to left on the bottom of the screen showing current weather data. The problem I have is the text file containing the weather data updates every 2 seconds and when the weather readings change the length of the text also changes. This causes the looping text to jump around. I tried using a conditional statement to set reload to 1 only if x was greater than the screen width but it seems reload doesn't evaluate conditional statements. Can anyone think of a way around this problem so that the text will only update once per loop, while off screen ?

  


  My command :

  


  ffmpeg -thread_queue_size 512 -re -rtsp_transport tcp -i "rtsp://192.168.x.x:7447" -i /YouTubeStream/CupolaCam/logo.png -f lavfi -i anullsrc -filter_complex "[0:v][1:v]overlay=20:925","drawbox=x=0:y=ih-35:w=iw:h=35:color=black@0.75:t=fill","drawtext=fontsize=30:fontcolor=white@.8:line_spacing=10:fontfile=/usr/share/fonts/truetype/Courier_Prime/CourierPrime-Regular.ttf:textfile=/YouTubeStream/CupolaCam/weatherdata/curtempformatted:y=h-line_h-5:x='if(gt(x\,-tw),w-mod(4*n\,w+tw)\,w)':reload=1" -c:v libx264 -profile:v high -bf 2 -g 15 -crf 18 -pix_fmt yuv420p -c:a aac -profile:a aac_low -b:a 128k -movflags faststart -f flv "rtmp://a.rtmp.youtube.com/live2/stream_key"


  


  The video on youtube : https://www.youtube.com/watch?v=Av6k8bf_2Zc

  


• How to setup ffmpeg for linux server

  1er décembre 2014, par hitesh

  I need to create a screen shot from video,

  I have followed this tutorial to do the intial setup in window 8, php 5.3

  1) I downloaded the ffmpeg from here -[
  http://ffmpeg.zeranoe.com/builds/ ] for 64 bit operating system.

  2) I followed the https://www.youtube.com/watch?v=gU49GiWGGAI , video and did all configuration successfully and phpinfo() shows that ffmpeg has been installed.

  3) Then I tried this to find out whether it is working or not,

  It worked successfully

  4) Next I followed this video tutorial here and thumbnails were created successfully.

  below is my code

  /**
  
   * FFMPEG-PHP Test Script
  
   *
  
   * Special thanks to http://www.sajithmr.me/ffmpeg-sample-code for this code example!
  
   * See the tutorial at http://myownhomeserver.com on how to install ffmpeg-php.
  
   */
  
  error_reporting(1);
  
  error_reporting(E_ALL ^ E_NOTICE);
  
  // Check if the ffmpeg-php extension is loaded first
  
  extension_loaded('ffmpeg') or die('Error in loading ffmpeg');
  
  
  
  // Determine the full path for our video
  
  $vid = realpath('./videos/myvideo.mp4');
  
  $videosize = filesize($vid);
  
  $remoteVideo = 'http://video-js.zencoder.com/oceans-clip.mp4';
  
  
  
  //ffmpeg
  
  
  
  $ffmpeg = dirname(__FILE__) . "\\ffmpeg\\bin\\ffmpeg";
  
  $imageFile = "1.png";
  
  $image2 = "2.png";
  
  $size = "120x90";
  
  $getfromsecond = 7;
  
  $cmd = "$ffmpeg -i $vid -an -ss $getfromsecond -s $size $imageFile";
  
  $cmd2 = "$ffmpeg -i $remoteVideo -an -ss $getfromsecond -s $size $image2";
  
  if(!shell_exec($cmd)){
  
      echo "Thumbnail created";
  
  }else{
  
      echo "Error Creating thumbnail";
  
  }
  
  
  
  if(!shell_exec($cmd2)){
  
      echo "Thumbnail for remote url was created";
  
  }else{
  
      echo "Error Creating thumbnail for remote url ";
  
  }

  ---

    OUTPUT
  
      Thumbnail created
  
      Thumbnail for remote url was created

  Now above code works as expected in my local, in window machine , I need to do it in my server environment(Linux server) with php 5.5. How do I do the configuration for ffmpeg in linux server with php 5.5.