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• avfilter/vf_waveform : add graticule for chroma and flat filter

  14 mars 2016, par Paul B Mahol

  avfilter/vf_waveform : add graticule for chroma and flat filter
  Signed-off-by : Paul B Mahol <onemda@gmail.com>
  

  • [DH] libavfilter/vf_waveform.c

• First upload video and display upload progress and then convert video using ffmpeg and display progress

  21 avril 2020, par Salman

  I am working on a video sharing platform. What I want to do is that when user upload a video, it first shows an upload progress bar and after completing upload it shows another progress bar for ffmpeg execution time remaining.

  



  I am using this jQuery code for displaying upload progress bar.

  



  $("body").on("submit", "form[name='upload']", function(e) {
    e.preventDefault();
    var formData = new FormData(this);
    $.ajax({
        cache: false,
        contentType: false,
        data: formData,
        dataType: "json",
        method: "POST",
        processData: false,
        url: "upload.php",
        error: function() {
            alert("Sorry, something went wrong!");
        },
        xhr: function() {
            var xhr = new window.XMLHttpRequest();
            xhr.upload.addEventListener("progress", function(evt) {
                if (evt.lengthComputable) {
                    var percentComplete = (evt.loaded / evt.total) * 100;
                    $(".upload .progress-bar").css({
                        "width": percentComplete + "%"
                    });
                }
            }, false);

            return xhr;
        }
    });
});


  



  And I am using this php code for executing video in ffmpeg.

  



  shell_exec('ffmpeg -i uploads/video.mp4 -c:a copy -s 256x144 uploads/video_144p.mp4 > uploads/output.log 2>&1');


  



  It generates an "output.log" file.
Now in jQuery I can GET the content of this log file and display the progress after little calculations.
This is the jQuery code

  



  $.ajax({
    type: "GET",
    cache: false,
    url: "uploads/output.log",
    success: function(response) {
        var duration = 0;
        var time = 0;
        var progress = 0;

        var matches = (response) ? response.match(/Duration: (.*?), start:/) : [];
        if (matches.length > 0) {
            var rawDuration = matches[1];

            var arrayReverse = rawDuration.split(":").reverse();
            duration = parseFloat(arrayReverse[0]);
            if (arrayReverse[1]) duration += parseInt(arrayReverse[1]) * 60;
            if (arrayReverse[2]) duration += parseInt(arrayReverse[2]) * 60 * 60;

            matches = response.match(/time=(.*?) bitrate/g);
            console.log(matches);

            if (matches.length > 0) {
                var rawTime = matches.pop();

                if (Array.isArray(rawTime)) {
                    rawTime = rawTime.pop().replace("time=", "").replace(" bitrate", "");
                } else {
                    rawTime = rawTime.replace("time=", "").replace(" bitrate", "");
                }

                arrayReverse = rawTime.split(":").reverse();
                time = parseFloat(arrayReverse[0]);
                if (arrayReverse[1]) time += parseInt(arrayReverse[1]) * 60;
                if (arrayReverse[2]) time += parseInt(arrayReverse[2]) * 60 * 60;

                progress = Math.round((time / duration) * 100);
            }
        }
        $(".execution .progress-bar").css({
            "width": progress + "%"
        });
    }
});


  



  Now I want a single AJAX code which will upload my file first and display "Upload progress" and after that it will execute my video in php FFMPEG and display "Execution progress"

  


• fluent ffmpeg how to set X11 display as input

  3 novembre 2018, par direxit

  With command line i can easily capture an Xserver display, trying to reproduce this with fluent-ffmpeg for node

  videoCommand.addInput(':99.0+0,150')
  
  .withSize('720x480')
  
  .withFpsInput(60)
  
  .withFpsOutput(60)
  
  .addInputOption('-y', '-f x11grab')
  
  .outputOptions(['-c:v libx264', '-crf 18' , '-preset veryfast' , '-t 
  
   00:00:05'])
  
  .output(base_path+'/video.mp4')
  
  .run();

  I get

  Unrecognized option 'f x11grab'.

  I am concerned about the syntax or way to set the input as DISPLAY :99.0
  and also to tell ffmpeg that i want x11grab.

  Where those has to be set ?

  --- EDIT ---

  changed to .addInputOptions(’-y’, ’-f x11grab’)
  with ’s’

  same error