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• Uncaught ReferenceError : CCapture is not defined ?

  13 octobre 2024, par The Dead Man

  I have a simple app to create a canvas and render it. I am using capture js and FFmpeg module for converting videos in my app, but when I run the app I get the following reference error :

  



  Uncaught ReferenceError: CCapture is not defined
    at test.js:67`


  



  Here is test.js :

  



  (function() {
  "use strict";

  var framesPerSecond = 60;
  var numFrames = 20; //framesPerSecond * 60 * 2;
  var thickness = 100;
  var speed = 4;
  var frameNum = 0;

  var canvas = document.getElementById("c");
  var ctx = canvas.getContext("2d");
  canvas.width = 1280;
  canvas.height = 720;

  var progressElem = document.getElementById("progress");
  var progressNode = document.createTextNode("");
  progressElem.appendChild(progressNode);

  function onProgress(progress) {
    progressNode.nodeValue = (progress * 100).toFixed(1) + "%";
  }

  function showVideoLink(url, size) {
    size = size ? (" [size: " + (size / 1024 / 1024).toFixed(1) + "meg]") : " [unknown size]";
    var a = document.createElement("a");
    a.href = url;
    var filename = url;
    var slashNdx = filename.lastIndexOf("/");
    if (slashNdx >= 0) {
      filename = filename.substr(slashNdx + 1);
    }
    a.download = filename;
    a.appendChild(document.createTextNode(url + size));
    document.body.appendChild(a);
  }

  var capturer = new CCapture( {
    format: 'ffmpegserver',
    //workersPath: "3rdparty/",
    //format: 'gif',
    verbose: false,
    framerate: framesPerSecond,
    onProgress: onProgress,
    //extension: ".mp4",
    //codec: "libx264",
  } );
  capturer.start();

  function drawLines(ctx) {
    for (var xx = -canvas.width; xx < canvas.width; xx += 2) {
      var l = (xx - (-canvas.width)) / (canvas.width * 2);
      ctx.beginPath();
      ctx.moveTo(xx, -canvas.height);
      ctx.lineTo(xx,  canvas.height);
      ctx.strokeStyle = "hsla(" + ((l * 360 * 24) % 360) + ",100%,50%,0.5)";
      ctx.stroke();
    }
  }

  function render(time) {
    ctx.fillStyle = "#000";
    ctx.fillRect(0, 0, canvas.width, canvas.height);

    ctx.fillStyle = "#FFF";
    for (var xx = 0; xx < canvas.width + thickness * 2; xx += thickness * 2) {
      var x = xx - (frameNum * speed % (thickness * 2));
      ctx.fillRect(x, 0, thickness, canvas.height);
    }

    ctx.save();
    ctx.globalCompositeOperation = "difference";

    ctx.font = "400px sans-serif";
    ctx.textAlign = "center";
    ctx.textBaseline = "middle";
    ctx.fillText(frameNum, canvas.width / 2, canvas.height / 2);


    ctx.save();
    ctx.translate(canvas.width * 0.5, canvas.height * 0.5);
    ctx.rotate(frameNum * 0.01);
    ctx.translate(canvas.width * 0.25, 0);
    drawLines(ctx);
    ctx.restore();

    ctx.save();
    ctx.translate(canvas.width * 0.5, canvas.height * 0.5);
    ctx.rotate(frameNum * -0.013);
    ctx.translate(canvas.width * 0.37, 0);
    drawLines(ctx);
    ctx.restore();

    ctx.restore();

    capturer.capture(canvas);

    ++frameNum;
    if (frameNum === numFrames) {
      capturer.stop();
      capturer.save(showVideoLink);
    } else {
      requestAnimationFrame(render);
    }
  }
  requestAnimationFrame(render);
}());


  


• How To Add Line Break In CMD Command In Batch File

  23 août 2022, par Harinder

  I want to add a line break in a batch file here is the code

  


  for %%I in (*.mp4) do (
    set "FullFileName=%%I"
    set "OnlyFileName=%%~nI"
    setlocal EnableDelayedExpansion
    set "FullFileNameTrim=!OnlyFileName:_=!"
    set "FullFileNameTrim=!OnlyFileName:~9!"
    
    set "OnlyFileName=!OnlyFileName:_= !"
    set "OnlyFileName=!OnlyFileName:-= !"
    set "n=!^&echo.!"
    set "OnlyFileName=!OnlyFileName:(=%n%!"
    set "OnlyFileName=!OnlyFileName:~9!"
    ffmpeg.exe -i "!FullFileName!" -vf "drawtext=text=!OnlyFileName!:fontfile='C\:\\Users\\harin\\Desktop\\test\\Fonts\\Glamy Sunrise.ttf':fontcolor=black:fontsize=54:x=20:y=50" -b:v 1M -r 60 -b:a 144k -crf 17 "C:\Users\harin\Desktop\test\in\Working\1\!FullFileNameTrim!.mp4"
    endlocal
)
endlocal


  


  I am not able to put line break by using

  


  set "n=!^&echo.!"
    set "OnlyFileName=!OnlyFileName:(=%n%!"


  


  Is there a way I can add a line break

  


  Thanks

  


• avfilter/af_channelmap : Fix double-free of AVFilterChannelLayouts on error

  7 août 2020, par Andreas Rheinhardt

  avfilter/af_channelmap : Fix double-free of AVFilterChannelLayouts on error
  The query_formats function of the channelmap filter tries to allocate
  
  a list of channel layouts which on success are attached to more permanent
  
  objects (an AVFilterLink) for storage afterwards. If attaching succeeds,
  
  the link becomes one of the common owners (in this case, the only owner)
  
  of the list. Yet if the list has been successfully attached to the link
  
  and an error happens lateron, the list was manually freed, which is wrong,
  
  because it is owned by its link so that the link's pointer to the list will
  
  become dangling and there will be a double-free/use-after-free when the link
  
  is later cleaned up automatically.
  This commit fixes this by removing the custom freeing code ; this will
  
  temporarily add a leaking codepath (if attaching the list fails, the list
  
  will leak), but this will be fixed soon by making sure that an
  
  AVFilterChannelLayouts without owner will be automatically freed when
  
  attaching it to an AVFilterLink fails.
  Reviewed-by : Nicolas George <george@nsup.org>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavfilter/af_channelmap.c