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• How can we feed bytearray of an image in input of ffmpeg for doing direct operation for live streaming to RTMP server

  31 janvier 2017, par Raj Kumar Singh

  What I am doing now is :

  I have a stream from a source, that give me byte array for each frame. I have to save that byte array to JPEG file. Each of the frames are being saved in memory. Then I’am streaming those JPEG to server using the FFMPEG command.

  What I want to do is :

  I want to skip the step of storing each frame as JPEG. I want to directly stream the byte array to RTMP server.

  The FFMPEG command I am using is :-

  ffmpeg -framerate 10 -i c:\Stream\img%03d.jpg -f flv rtmp://192.168.243.195/live/ac71e

• I am trying to trim a Video, I can perform trimming Operation.I am not able to get response from node js.

  28 mars 2017, par Sumit Sarkar

  This is my block of code from index.js

  router.get(’/trimVideo’, function(req, res, next)
  res.set(
  "Content-Type" :"text/json"
  ) ;

   try{
  
   var inputDirectory = opts.videoDir+'/'+req.query.videoName;
  
   var outputDirectory = opts.videoDir+'/trim/'+'Trimmed_'+req.query.videoName;
  
   ffmpeg()
  
      .input(inputDirectory)
  
      .format('mp4')
  
      .seekInput(req.query.StartTrimTime)
  
      .duration(req.query.EndTrimTime)
  
      .on('start', function(cmd){
  
          console.log('Started' + cmd)
  
      })
  
      .on('error', function(err){
  
          console.log('An error occured: ' + err.message)
  
      })
  
      .output(outputDirectory)
  
      .on('end',function(){
  
          fs.createReadStream(outputDirectory).pipe(fs.createWriteStream(opts.videoDir+'/'+req.query.videoName));
  
          console.log('Finished Encoding');
  
  
  
          res.write(JSON.stringify({ OK: 1 }));
  
          res.end();
  
      })
  
      .run();
  
  }
  
  
  
   catch(error){
  
      res.write(JSON.stringify({ OK: 0 }));
  
      res.end();
  
  }

  ) ;

  This is my block of code for ajax call

  $.ajax(
  type : "GET",
  url : "/trimVideo",
  data :
  StartTrimTime : startTime,
  EndTrimTime : endTime,
  videoName : name
  ,
  dataJson : ’json’,
  success : function(data)
  console.log(’success’) ;
  console.log(JSON.stringify(data)) ;
  
  )

• double rendering with video file(i.e. mov file like) and camera recording file

  17 septembre 2018, par 한승수

  I am making an app for rendering mov file and recorded file by android device at once. because of speed for rendering I cannot use ffmpeg. So I use mediaProjection .virtualdisplay(). but the problem is virtualDisplay only allows to capture screen from very upper left side. so it captures whole upper part of device(which means it captures bar containing battery remains and antenna icons).

  my questions are below

  1. how to capture certain part that I want by using virtualDistply.
  2. any method that I can mitigate rendering speed if I am using ffmpeg ? within 5 second if video length 30 seconds.