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• node-fluent-ffmpeg Multiple images to video

  16 août 2015, par tsurantino

  I am trying to stitch multiple .PNG images to a single .MP4 video using Node. I am using ffmpeg and specifically, the node-fluent-ffmpeg library.

  I can only get one frame to show up at a time, when I instead intend to show 100+.

  var video = ffmpeg();
  
  
  
    for (var i = 1; i <= 168; i++) {
  
      //console.log('Adding: ' + path.join(__dirname, 'public', 'tmp', 'frame-' + i.toString() + '.png'));
  
      video.input(path.join(__dirname, 'public', 'tmp', 'frame-' + i.toString() + '.png')).loop(1);
  
    }
  
  
  
    video.save(path.join(__dirname, 'public', 'videos', 'test.mp4'))
  
    .on('end', function() {
  
      console.log('file has been converted succesfully');
  
      res.redirect('/');
  
    })
  
    .on('error', function(err) {
  
      console.log('an error happened: ' + err.message);
  
    })

• From multiple video files to single output

  25 juillet 2019, par Cordo van Saviour

  Let’s say that I have a list of hundreds of possible video files. Using ffmpeg it’s pretty easy to take multiple files and stitch them together to single video output, but that’s where the things become tricky.

  I’m looking for a way to have them stream live and dynamically add videos to queue as stream goes on. Think of something like SSAI but for the whole video.

  Stream live is there so we don’t have a delay while waiting for ffmpeg to finish the whole video but rather start as soon as possible, and also so we could choose next files in queue during the live stream.

  Simplified, it would look something like this :

  [v] [v] [v] [v] - stored video files, eg. on S3 
  
  
  
        [v] - chosen file
  
  
  
        | | 
  
        | | - during the live stream
  
        | |
  
        \ /
  
         V    
  
     _________             ___________              ___________
  
     \       /             |         |              ||       ||
  
      \     /    =====>    |         |    =====>    ||  |:>  ||
  
       \___/               |_________|              ||_______||
  
    Video queue              FFMPEG?                Live stream
  
                        Transcoding module?
  
                              Magic?

  I’m writing this in Node.js if that makes any difference.

  Is this even possible ? If you need any more information please ask away, and every suggestion is greatly appreciated !

• How to convert a CCTV footage into time lapse video by cutting parts of the video by a set interval on FFMPEG [duplicate]

  2 décembre 2020, par mark

  I have bunch of CCTV footages and I want it to look like it was recorded from a time lapse camera. One video file is around 3 hours long capturing scenes in real time (from 1pm-3pm for example). And in one day, I'll get around 8 footages (8files * 3hours = 24hours = 1 day)

  


  I want to convert those 24hours worth of footages to 1min making 1 day = 1min of video not just making it fast but actually cutting some of the scenes by a set interval. Usually, a time lapse camera has an interval of one photo per 10 min and at the end of the day, it will stitch them into one video. How can I do something like that on FFMPEG ?

  


  I'm using FFmpeg Batch converter and here's my code so far. It just makes my videos faster but not cutting it into itervals

  


  -filter:v "setpts=0.25*PTS" -an


  


  I ended up with this code :

  


  -vf framestep=25,select='not(mod(n,1000))',setpts=N/FRAME_RATE/TB -an


  


  The above code will make a 1hr long video into 4sec which is perfect for my needs.